presales data warehousing

7/27/2019 Presales Data Warehousing

1/78

1. True/False. Database Resource Manager can define the degree of parallelism for a

Consumer Group. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. Database Resource Manager can define the degree of parallelism

for a Consumer Group.

2. Which of the following are part of the data quality features of Oracle Warehouse

Builder? Marcar para Revisin

(1) Puntos

(Seleccione todas las respuestas correctas)

Data profiling (*)

Exception reporting

Match-merge (*)

Extraction tools

Incorrecto Incorrect. Data profiling and match-merge are part of the data quality

features of Oracle Warehouse Builder.


2/78

3. True/False. Oracle Exadata Database Machine combines storage and processing.

Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. The Oracle Exadata Database Machine combines storage with

processing.

4. Which of the following can be used transparently by applications, without having

to change the application code? Marcar para Revisin

(1) Puntos


Oracle OLAP (*)

RAC (*)

Plan stabilization (*)

Materialized views (*)

Incorrecto Incorrect. Materialized views, Oracle OLAP, plan stabilization and RAC

can all be used transparently, without having to make changes to an application.


3/78

5. How many Exadata cells can be stored in a rack? Marcar para Revisin

(1) Puntos

18 (*)

2

32

16

24

Incorrecto Incorrect. You can store up to 18 Exadata cells in a rack.

6. Interval partitioning delivers which of the following benefits? Marcar para Revisin

(1) Puntos


Improved performance versus range partitions.

Automatic creation of new partitions, based on a length of time. (*)

Automatic transfer of older partitions to reduced cost storage.

The ability to partition data based on a date. (*)


4/78

Correcto Correct. Interval partitioning is based on a date, and can automatically

create new partitions based on a length of time.

7. Which features included in the Oracle Exadata Database Machine contribute toimproved availability? Marcar para Revisin

(1) Puntos


Redundant switches (*)

RAC (*)

ASM (*)

Redundant power supplies (*)

Incorrecto Incorrect. Redundant power supplies and switches, ASM and RAC allcontribute to the high availability of the Oracle Exadata Oracle Database Machine.

8. Which of the following dimensions is included in most data warehouses? Marcar

para Revisin

(1) Puntos

Cost dimension

Time dimension (*)

Location dimension


5/78

Product dimension

Incorrecto Incorrect. Most data warehouses include a time dimension.

9. Which of the following statements are true about composite partitioning? Marcar

para Revisin

(1) Puntos


Composite partitioning can use different partitioning methods for each level. (*)

Composite partitioning has to use partitioning methods for each level.

Composite partitioning has more than one level of partitions. (*)

Composite partitioning always uses different partitioning methods for each level.

Incorrecto Incorrect. Composite partitioning has more than one level, and can (but

does not have to) use different partitioning methods for each level.

10. For OLTP data, it is a good practice to compress _____. Marcar para Revisin

(1) Puntos

Your largest tables

Some of your B*-tree indexes


6/78

All data and indexes

Some of your bit-mapped indexes

Your largest tables AND some of your B*-tree indexes (*)

Incorrecto Incorrect. It makes sense to compress your largest tables and some of

your B*-tree indexes for an OLTP database.

11. With Database Resource Manager, you can _____. Marcar para Revisin(1) Puntos


Specify the amount of parallelism for a resource group. (*)

Specify the maximum number of concurrent operations for a resource group (*)

Limit access to particular data for a resource group.

Limit resource consumption for a resource group (*)

Incorrecto Incorrect. With Database Resource Manager you can specify the

maximum number of concurrent operations and the amount of parallelism for aresource group, as well as limit the resource consumption for a resource group.

12. Exadata Storage Servers improve performance in which ways? Marcar para

Revisin


7/78

(1) Puntos


Reducing the amount of rows returned to the server (*)

More efficient memory usage

Reducing the amount of I/O performed

Moving some intelligence to smart scans in the Exadata cells (*)

Correcto Correct. Exadata improves performance by offloading CPU funtions to the

cells and reducing the amount of data returned to the server.

13. The Oracle Warehouse Builder Repository can _____. Marcar para Revisin

(1) Puntos


Import metadata from Oracle tools (*)

Synchronize access for multiple users (*)

Lock objects in repository (*)

Import metadata from ERWin (*)


8/78

Incorrecto Incorrect, the Oracle Warehouse Builder repository can import meta data

from Oracle tools and ERWin, among other tools, synchronize multi-user access to

metadata and lock objects in the repository.

14. How can you use data mining with Oracle Warehouse Builder? Marcar para

Revisin

(1) Puntos

To eliminate ETL logging

To identify records to extract

To increase write performance

As a standard transform operation (*)

Correcto Correct. You can use data mining with Oracle Warehouse Builder s a

standard transform operation.

15. Advanced Compression compresses data _____. Marcar para Revisin

(1) Puntos

On subsequent UPDATEs

On initial load (*)

On subsequent INSERTs

On subsequent UPDATEs and INSERTs


9/78

Incorrecto Incorrect. Advanced Compression compresses data when it is initially

loaded, and compresses INSERTs and UPDATEs in batch.

16. Which of the following qualities come with REF partitions? Marcar para Revisin

(1) Puntos


With REF partitions, changes to partitioning in the master table are automatically

reflected in related table. (*)

With REF partitions, changes in a master table are not reflected in related tables.

With REF partitions, the sub-partitions are automatically created in a related table

(*)

Incorrecto Incorrect. With REF partitioning, related tables are partitioned to matchthe master table, and subsequent changes in the master table are reflected in the

related tables.

17. What is Oracle's market share in the data warehousing market? Marcar para

Revisin

(1) Puntos

22%

15%

10%


10/78

41% (*)

Incorrecto Incorrect. Oracle's market share for data warehousing is 41%.

18. Compression can be applied to which of the following? Marcar para Revisin

(1) Puntos


Tables (*)

Indexes (*)

Partitions (*)

Views

Incorrecto Incorrect. You can apply compression to tables, indexes or partitions.

19. True/False. You can use Oracle Data Mining on unstructured data. Marcar para

Revisin

(1) Puntos

Verdadero (*)

Falso


11/78

Incorrecto Incorrect. You can use Oracle Data Mining on unstructured data.

20. Exadata uses smart scans, which are _____. Marcar para Revisin

(1) Puntos

Done in Exadata cells. (*)

Exadata doesn't use smart scans.

Done by the CPU.

Done in memory.

Correcto Correct. Exadata smart scans are done in Exadata cells.

21. What are Oracle Data Integrator templates used for? Marcar para Revisin

(1) Puntos

As reports to monitor ETL activity

To define how to transform data (*)

To optimize data exports

To model SAP applications


12/78

Incorrecto Incorrect. Oracle Data Integrator templates are used to define how to

transform data.

22. SQL Access Advisor can give what type of advice? Marcar para Revisin

(1) Puntos


Materialized view advice (*)

Partition advice (*)

Compression advice

Index advice (*)

Data Masking

Incorrecto Incorrect. SQL Access Advisor can give advice on partitioning, index

usage and materialized views.

23. Which is the fastest way to load data into an Oracle data warehouse? Marcar

para Revisin

(1) Puntos

Data Pump

SQL*Loader


13/78

External table using CREATE TABLE AS . . . SELECT (*)

Direct Path loading

Incorrecto Incorrect. Using an external table and CTAS is the fastest way to load

data.

24. Which of the following can be used as meta-data clients for Oracle Warehouse

Builder meta-data? Marcar para Revisin

(1) Puntos

Meta-data browser

Custom Java applications

Meta-data browser and OWB GUI

Meta-data browser, OWB GUI and Custom Java applications (*)

OWB GUI

Incorrecto Incorrect. The meta-data browser, OWB GUI and custom Java

applications can be used as meta-data clients for Oracle Warehouse Builder meta-data.

25. Which of the following things can Oracle Data Mining do? Marcar para Revisin

(1) Puntos



14/78

Predict customer behaviour (*)

Associate factors with a business issue (*)

Reduce the amount of data used in a data warehouse

Determine associations within a population (*)

Incorrecto Incorrect. Oracle Data Mining can be used to predict customer behaviour,

associate factors with a business issue, or determine associations within a populationto use for future marketing and sales actions.

26. Which of the following statements are true about Oracle OLAP? Marcar para

Revisin

(1) Puntos


Oracle OLAP uses standard Oracle security. (*)

Oracle OLAP runs in the Oracle database. (*)

Meta data for Oracle OLAP is in a compatible data dictionary.

Oracle OLAP can be used with RAC. (*)

Incorrecto Incorrect. Oracle OLAP runs in the Oracle database and uses standard

Oracle security. Oracle OLAP can be used with RAC, but Oracle OLAP stores its meta

data in the Oracle data dictionary itself.


15/78

27. Which of the following databases are supported by Oracle Data Integrator?

Marcar para Revisin

(1) Puntos


Oracle Database (*)

DB2 (*)

Netezza (*)

Teradata (*)

Incorrecto Incorrect. Oracle Database, DB2, Teradata and Netezza are supported by

Oracle Data Integrator.

28. True/False. Adaptive parallelism is ON by default. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. Adaptive parallelism is on by default, based on the

PARALLEL_ADPATIVE_MULTI_USER parameter, which is TRUE by default.


16/78

29. What are some of the benefits provided by ASM? Marcar para Revisin

(1) Puntos


Performance of raw partitions (*)

Easier to manage than file systems (*)

Automatic striping and mirroring (*)

Low cost option for Oracle database.

Incorrecto Incorrect. ASM is easier to manage than file systems, provides the

performance of raw partitions, and automatically implements striping and mirroring, all

with no extra cost.

30. How many Exadata cells can be used in a grid? Marcar para Revisin

(1) Puntos

128

10

No practical limit (*)

18

36


17/78

Correcto Correct. There is no practical limit to the number of Exadata cells that can

be in a grid.

31. True/False. Oracle Warehouse Builder allows you to graphically map data flows.Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Incorrecto Incorrect. Oracle Warehouse Builder allows you to graphically map data

flows.

32. What type of data is held in the result cache? Marcar para Revisin

(1) Puntos


Results from PL/SQL function (*)

Aggregate data.

SQL results (*)

Index data


18/78

Incorrecto Incorrect. The result cache holds both SQL results and the results from

PL/SQL functions.

33. True/False. When you use compressed RMAN backups for recovery, you have togo through an extra step of decompression. Marcar para Revisin

(1) Puntos

Verdadero

Falso (*)

Incorrecto Incorrect. You do not have to go through an extra step of decompression

when you use compressed RMAN backups for recovery.

34. Which of the following types of organization are common to data warehouses?

Marcar para Revisin

(1) Puntos


Third normal form schema

Snowflake schema (*)

Star schema (*)

Fourth normal form schema


19/78

Incorrecto Incorrect. Star schemas and snowflake schemas are common to data

warehouses.

35. Oracle Data Mining can take advantage of which of the following qualities of theOracle database? Marcar para Revisin

(1) Puntos


Enterprise Manager (*)

Parallelism (*)

Security (*)

RAC (*)

Incorrecto Incorrect. Data mining can take advantage of standard Oracle features,such as parallelism, RAC, Enterprise Manager and security.

36. How does partitioning help improve availability? Marcar para Revisin

(1) Puntos

Provides resilient failover based on partitions AND reduces maintenance windows by

allowing maintenance on individual partitions.

Provides resilient failover based on partitions AND reduces liklihood of an individual

partition becoming unavailable.


20/78

Provides resilient failover based on partitions.

Reduces maintenance windows by allowing maintenance on individual partitions. (*)

Reduces liklihood of an individual partition becoming unavailable.

Incorrecto Incorrect. By reducing the maintenance window, partitioning can

contribute to the availability of the overall system.

37. Which of the following scenarios would benefit most from using the SQL resultcache? Marcar para Revisin

(1) Puntos

Queries with long run times and small result sets. (*)

All data warehouse style queries.

Queries that are used infrequently.

Queries that work on data which changes frequently.

Incorrecto Incorrect. The SQL result cache will usually benefit long running queries

that return small result sets, and are run frequently on fairly static data.

38. Partitioning can improve performance due to which of the following reasons?

Marcar para Revisin

(1) Puntos


21/78

Partition-wise joins.

Partitioning doesn't improve performance.

Partition pruning by the optimizer.

Partition pruning and partition-wise joins. (*)

Incorrecto Incorrect. Both partition pruning and partition-wise joins improve the

performance of queries with partitioning.

39. Which of the following are best practices for designing a well-performing data

warehouse with Oracle? Marcar para Revisin

(1) Puntos


Partition your tables appropriately to produce partition wise joins (*)

Create a star schema design (*)

Create a bit-mapped index on foreign key columns in the fact table (*)

Incorrecto Incorrect. Using partitions and star schemas appropriately and includinga bit-mapped index on the fact table all contribute to good performance.

40. What is the minimum recommended amount of memory per CPU core for a data

warehouse? Marcar para Revisin


22/78

(1) Puntos

8 GB

4 GB (*)

2 GB

16 GB

Incorrecto Incorrect. The minimum recommended memory per core is 4 GB.

41. Which of the following maintenance operations can be performed on a partition?

Marcar para Revisin

(1) Puntos


Backed up (*)

Taken online or off line (*)

Truncated

Merged (*)

Incorrecto Inorrect. Individual partitions can be taken on or off line, backed up, or

merged with other partitions.


23/78

42. Which of the following require application changes to obtain benefits? Marcar

para Revisin

(1) Puntos

Compression

Partitioning, Materialized views and Compression

You don't have to change any applications to benefit from partitioning, materialized

views or compression (*)

Partitioning

Materialized views

Incorrecto Incorrect. You don't have to change any applications to benefit from

partitioning, materialized views or compression.

43. Oracle Data Mining, compared to SAS, provides which of the following

advantages? Marcar para Revisin

(1) Puntos

Reduced data movement, reduced data duplication and reuse of existing security (*)

Reduced data movement

Reduced data movement, reduced data duplication

Reduced data duplication


24/78

Reuse of existing security

Incorrecto Incorrect. With Oracle Data Mining, you do not have to move data to a

duplicate environment, and you can automatically use the security of the Oracle

Database.

44. How many Knowledge Modules come with Oracle Data Integrator? Marcar para

Revisin

(1) Puntos

100

25

120 (*)

50

200

Incorrecto Incorrect. 120 Knowledge Modules come with Oracle Data Integrator.

45. True/False. Queries have to specify the use of the Database Result Cache to use

it. Marcar para Revisin

(1) Puntos

Verdadero


25/78

Falso (*)

Correcto Correct. The Database Result Cache is used transparently.

46. True/False. Oracle Data Integrator allows you to monitor ETL sessions in real time.

Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Incorrecto Incorrect. Oracle Data Integrator allows you to monitor ETL sessions in

real time.

47. How can you implement near real-time data integration with Oracle DataIntegrator? Marcar para Revisin

(1) Puntos


By mining Oracle UNDO segments

By connecting to publish and subscribe JMS message services (*)

By accessing Change Data Capture records from logs (*)

By reading operating system logs


26/78

Incorrecto Incorrect. You can implement near real-time data integration with Oracle

Data Integrator by capturing Change Data Capture records from logs or by connecting

to publish and subscribe JMS message services.

48. Which of the following statements about a data warehouse is NOT true? Marcar

para Revisin

(1) Puntos

A data warehouse consolidates data from multiple sources.

A data warehouse is primarily read only.

A data warehouse is used for trend analysis.

A data warehouse is used for tactical purposes. (*)

Incorrecto Incorrect. A data warehouse is primarily used for strategic purposes.

49. Which of the following are Knowledge Modules that come with Oracle Data

Integrator? Marcar para Revisin

(1) Puntos


Siebel (*)

MS Excel (*)


27/78

SAP/R3 (*)

SQL Server Triggers (*)

MS Access

Incorrecto Incorrect. SAP/R3, SQL Server Triggers, MS Excel and Siebel are

Knowledge Modules that come with Oracle Data Integrator.

50. Which of the following contributes to the improved performance of the Oracle

Exadata Database Machine? Marcar para Revisin

(1) Puntos


Proprietary high speed CPUs

Exadata Storage Server (*)

InfiniBand switches (*)

Correcto Correct. The InfiniBand switches allow for greater data flow, while the

Exadata Storage Server reduces the amount of data sent for processing.


28/78

1. Which of the following qualities come with REF partitions? Marcar para Revisin

(1) Puntos


With REF partitions, changes in a master table are not reflected in related tables.

With REF partitions, the sub-partitions are automatically created in a related table

(*)

With REF partitions, changes to partitioning in the master table are automatically

reflected in related table. (*)

Incorrecto Incorrect. With REF partitioning, related tables are partitioned to match

the master table, and subsequent changes in the master table are reflected in the

related tables.

2. How many Exadata cells can be used in a grid? Marcar para Revisin

(1) Puntos

10

128

36

No practical limit (*)

18


29/78

Correcto Correct. There is no practical limit to the number of Exadata cells that can

be in a grid.

3. True/False. Queries have to specify the use of the Database Result Cache to use it.

Marcar para Revisin

(1) Puntos

Verdadero

Falso (*)

Correcto Correct. The Database Result Cache is used transparently.


(1) Puntos







30/78

Correcto Correct. ASM is easier to manage than file systems, provides the


with no extra cost.

5. How can you implement near real-time data integration with Oracle Data


(1) Puntos






Correcto Correct. You can implement near real-time data integration with Oracle



6. Which of the following can be used transparently by applications, without having to

change the application code? Marcar para Revisin

(1) Puntos



RAC (*)


31/78


Oracle OLAP (*)

Correcto Correct. Materialized views, Oracle OLAP, plan stabilization and RAC can all

be used transparently, without having to make changes to an application.

7. How does compression affect resource utilization? Marcar para Revisin

(1) Puntos

Reduces amount of CPU and disk.

Increases amount of CPU and disk

Reduces amount of disk, increases CPU for loading (*)

Increases amount of disk, reduces CPU for loading.

Incorrecto Incorrect. Using compression can increase the amount of CPU needed

when loading the data, but reduces the amount of disk space used.

8. Which of the following are advantages provided by partitioning? Marcar paraRevisin

(1) Puntos



32/78

Provides added flexibility for maintenance operations. (*)

Reduces storage requirements for tables.

Helps to improve the benefits of parallelism. (*)

Improves performance by reducing I/O. (*)

Incorrecto Incorrect. Partitioning improves performance by reducing I/O,

accelerates the benefits of parallelism and provides added flexibility for maintenance

operations.

9. Oracle Data Mining can take advantage of which of the following qualities of the

Oracle database? Marcar para Revisin

(1) Puntos


Parallelism (*)


RAC (*)

Security (*)

Correcto Correct. Data mining can take advantage of standard Oracle features, such

as parallelism, RAC, Enterprise Manager and security.


33/78

10. Which of the following maintenance operations can be performed on a partition?

Marcar para Revisin

(1) Puntos


Merged (*)

Backed up (*)

Truncated

Taken online or off line (*)

Correcto Correct. Individual partitions can be taken on or off line, backed up, or

merged with other partitions.

11. The Database Result Cache can _____. Marcar para Revisin

(1) Puntos


Cache results from queries (*)

Cache returns from PL/SQL functions (*)

Cache PL/SQL code

Cache query execution plans


34/78

Incorrecto Incorrect. The Query Result Cache caches results from queries and

returns from PL/SQL functions.


Revisin

(1) Puntos

10%

22%

41% (*)

15%

Incorrecto Incorrect. Oracle's market share for data warehousing is 41%.


(1) Puntos

32

16

18 (*)

2


35/78

24

Correcto Correct. You can store up to 18 Exadata cells in a rack.

14. Which of the following types of organization are common to data warehouses?

Marcar para Revisin

(1) Puntos


Fourth normal form schema

Third normal form schema

Star schema (*)

Snowflake schema (*)

Correcto Correct. Star schemas and snowflake schemas are common to data

warehouses.

15. True/False. You can use Oracle Data Mining on unstructured data. Marcar para

Revisin

(1) Puntos

Verdadero (*)

Falso


36/78

Correcto Correct. You can use Oracle Data Mining on unstructured data.


(1) Puntos


On initial load (*)



Correcto Correct. Advanced Compression compresses data when it is initially loaded,

and compresses INSERTs and UPDATEs in batch.

17. Interval partitioning delivers which of the following benefits? Marcar para

Revisin

(1) Puntos






37/78





(1) Puntos






Correcto Correct. The Oracle Warehouse Builder repository can import meta data

from Oracle tools and ERWin, among other tools, synchronize multi-user access to

metadata and lock objects in the repository.

19. For OLTP data, it is a good practice to compress _____. Marcar para Revisin

(1) Puntos



38/78

Your largest tables




Correcto Correct. It makes sense to compress your largest tables and some of your

B*-tree indexes for an OLTP database.

20. SQL Access Advisor can give what type of advice? Marcar para Revisin

(1) Puntos


Materialized view advice (*)

Index advice (*)

Compression advice

Data Masking

Partition advice (*)

Correcto Correct. SQL Access Advisor can give advice on partitioning, index usage

and materialized views.

21. Which of the following products use Oracle Data Mining? Marcar para Revisin


39/78

(1) Puntos


Oracle Real Application Clusters

Oracle Sales Prospector (*)

Oracle CRM

Oracle Retail Data Model (*)

Incorrecto Incorrect. Oracle Sales Prospector and Oracle Retail Data Model both use

Oracle Data Mining.


Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. The Oracle Exadata Database Machine combines storage withprocessing.

23. Which features included in the Oracle Exadata Database Machine contribute to

improved availability? Marcar para Revisin


40/78

(1) Puntos


ASM (*)

RAC (*)



Correcto Correct. Redundant power supplies and switches, ASM and RAC all

contribute to the high availability of the Oracle Exadata Oracle Database Machine.

24. Bitmap join indexes produce which of the following benefits? Marcar para

Revisin

(1) Puntos


Reduced space for index (*)

The ability to use multiple fact tables (*)

Lower memory usage

Faster performance (*)


41/78

Incorrecto Incorrect, bitmap join indexes produce faster performance, use less

space for the index and allow the use of multiple fact tables.

25. True/False. When you use compressed RMAN backups for recovery, you have togo through an extra step of decompression. Marcar para Revisin

(1) Puntos

Verdadero

Falso (*)

Correcto Correct. You do not have to go through an extra step of decompression

when you use compressed RMAN backups for recovery.

26. For data warehousing, you can use RAC in which of the following ways? Marcar

para Revisin

(1) Puntos


To distribute workload to some of the nodes. (*)

To distribute workload across all nodes. (*)

To provide high availability for all operations. (*)

To provide parallel query servers across nodes. (*)


42/78

Incorrecto Incorrect. You can use RAC with a data warehouse to distribute workload

to all or some of the nodes in a cluster, to use parallel query services across the nodes,

and to provide standard high availability to data warehouse applications.

27. You can improve implementation speed by using which of the following

alternatives? Marcar para Revisin

(1) Puntos


Customized systems

Oracle Exadata Database Machine (*)

Component hardware

Optimized Warehouse Configurations (*)

Incorrecto Incorrect. Both Optimized Warehouse Configurations and the Oracle

Exadata Database Machine can reduce the time needed to implement a data

warehouse.

28. True/False. Materialized views can be used by queries written before the

materialized view was created. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso


43/78

Correcto Correct. Query rewrite allows any query to use a materialized view.



(1) Puntos

16 GB

2 GB

8 GB

4 GB (*)

Correcto Correct. The minimum recommended memory per core is 4 GB.


(1) Puntos

Verdadero (*)

Falso




44/78

31. Which of the following can be used as meta-data clients for Oracle Warehouse

Builder meta-data? Marcar para Revisin

(1) Puntos

Meta-data browser, OWB GUI and Custom Java applications (*)

OWB GUI

Custom Java applications

Meta-data browser and OWB GUI

Meta-data browser

Incorrecto Incorrect. The meta-data browser, OWB GUI and custom Java

applications can be used as meta-data clients for Oracle Warehouse Builder meta-data.

32. Oracle Data Mining, compared to SAS, provides which of the followingadvantages? Marcar para Revisin

(1) Puntos







45/78

Correcto Correct. With Oracle Data Mining, you do not have to move data to a


Database.

33. SecureFiles reduces storage costs by _____. Marcar para Revisin

(1) Puntos

Automatic deduplication of data

Automatic deduplication of data AND compression (*)

Compression

Storing images at a lower resolution

Storing images at a lower resolution AND compression

Incorrecto Incorrect. SecureFiles uses compression and deduplication to reduce

storage.

34. What are Oracle Data Integrator templates used for? Marcar para Revisin

(1) Puntos

To optimize data exports

As reports to monitor ETL activity


46/78

To model SAP applications

To define how to transform data (*)

Correcto Correct. Oracle Data Integrator templates are used to define how to

transform data.

35. True/False. The SQL optimizer is aware of Oracle OLAP cubes. Marcar para

Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. The SQL optimizer is aware of Oracle OLAP cubes.


(1) Puntos







47/78

Correcto Correct. Oracle Data Mining can be used to predict customer behaviour,

associate factors with a business issue, or determine associations within a population

to use for future marketing and sales actions.

37. Which of the following databases are supported by Oracle Data Integrator?

Marcar para Revisin

(1) Puntos


Netezza (*)

Teradata (*)

Oracle Database (*)

DB2 (*)

Correcto Correct. Oracle Database, DB2, Teradata and Netezza are supported by

Oracle Data Integrator.

38. True/False. There is a GUI interface to Oracle Data Mining functionality. Marcar

para Revisin

(1) Puntos

Verdadero (*)

Falso


48/78

Incorrecto Incorrect. There is a GUI interface to Oracle Data Mining.


para Revisin

(1) Puntos





Incorrecto Incorrect. A data warehouse is primarily used for strategic purposes.


Revisin

(1) Puntos

120 (*)

25

100

50


49/78

200

Correcto Correct. 120 Knowledge Modules come with Oracle Data Integrator.

41. Data Guard compresses data _____. Marcar para Revisin

(1) Puntos

When using physical standby

When catching up after a network failure (*)

When using logical standby

Always

Incorrecto Incorrect. Data Guard only compresses data sent over the network whenrecovering from a gap caused by a network failure.

42. SecureFiles allows _____. Marcar para Revisin

(1) Puntos


Random writes to SecureFiles (*)

Multiple levels of compression (*)


50/78

Partition-specified compression (*)

Bit level security

Incorrecto Incorrect. SecureFiles allows random writes to SecureFiles, multiple

levels of compression and the ability to specify compression at the partition level.


(1) Puntos

Done in memory.


Done by the CPU.



44. Which of the following require application changes to obtain benefits? Marcar

para Revisin

(1) Puntos

Materialized views

Partitioning, Materialized views and Compression


51/78

Partitioning

Compression

You don't have to change any applications to benefit from partitioning, materialized

views or compression (*)

Correcto Correct. You don't have to change any applications to benefit from

partitioning, materialized views or compression.

45. True/False. Oracle Data Integrator allows you to monitor ETL sessions in real

time. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. Oracle Data Integrator allows you to monitor ETL sessions in real

time.

46. Why does partitioning help parallelism with RAC? Marcar para Revisin

(1) Puntos

Partitioning allows you to do partition-wise joins, which reduces inter-nodeinterconnect traffic. (*)

Partitioning allows you to split data storage across nodes.

Partitioning reduces storage requirments.


52/78

Incorrecto Incorrect. Partitioning allows you to do partition-wise joins, which

reduces inter-node interconnect traffic.

47. True/False. You can perform 'what-if' analysis of potential changes with Oracle

Warehouse Builder. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Incorrecto Incorrect. You can perform 'what-if' analysis of potential changes with

Oracle Warehouse Builder.

48. Which of the following are best practices for designing a well-performing datawarehouse with Oracle? Marcar para Revisin

(1) Puntos


Create a bit-mapped index on foreign key columns in the fact table (*)

Create a star schema design (*)

Partition your tables appropriately to produce partition wise joins (*)


53/78

Correcto Correct. Using partitions and star schemas appropriately and including a

bit-mapped index on the fact table all contribute to good performance.

49. What are some of the advantages of using Oracle Data Integration? Marcar paraRevisin

(1) Puntos


It offers high availability at no additional costs

Takes advantage of the database optimizer (*)

No additional servers needed to implement ETL (*)

Can scale efficiently (*)

Incorrecto Incorrect. Some of the advantages of using Oracle Data Integration areno additional servers needed to implement ETL, ODI takes advantage of the database

optimizer and ODI can scale efficiently.

50. Which of the following control structures can be defined as part of a data flow

with Oracle Data Integrator? Marcar para Revisin

(1) Puntos


Loops (*)

GOTOs


54/78

Conditions (*)

Error handling (*)

Correcto Correct. Loops, conditions and error handling can be defined as part of a

data flow with Oracle Data Integrator.


55/78

1. Materialized views can be based on _____. Marcar para Revisin

(1) Puntos

Oracle tables, Oracle OLAP cubes AND Oracle PL/SQL results

Oracle PL/SQL results

Oracle tables

Oracle tables AND Oracle OLAP cubes (*)

Oracle OLAP cubes

Incorrecto Incorrect. Materialized views can be based on Oracle tables or OLAP

cubes.

2. How can you use data mining with Oracle Warehouse Builder? Marcar para

Revisin

(1) Puntos

As a standard transform operation (*)

To identify records to extract

To increase write performance

To eliminate ETL logging


56/78

Correcto Correct. You can use data mining with Oracle Warehouse Builder s a

standard transform operation.

3. Which features included in the Oracle Exadata Database Machine contribute toimproved availability? Marcar para Revisin

(1) Puntos


ASM (*)



RAC (*)

Correcto Correct. Redundant power supplies and switches, ASM and RAC allcontribute to the high availability of the Oracle Exadata Oracle Database Machine.


(1) Puntos





57/78



Correcto Correct. ASM is easier to manage than file systems, provides the


with no extra cost.

5. How can you implement near real-time data integration with Oracle Data


(1) Puntos






Correcto Correct. You can implement near real-time data integration with Oracle



6. Which of the following are part of the data quality features of Oracle Warehouse

Builder? Marcar para Revisin

(1) Puntos


58/78


Exception reporting

Data profiling (*)

Match-merge (*)

Extraction tools

Correcto Correct. Data profiling and match-merge are part of the data qualityfeatures of Oracle Warehouse Builder.

7. With Database Resource Manager, you can _____. Marcar para Revisin

(1) Puntos


Specify the amount of parallelism for a resource group. (*)

Specify the maximum number of concurrent operations for a resource group (*)

Limit access to particular data for a resource group.

Limit resource consumption for a resource group (*)

Correcto Correct. With Database Resource Manager you can specify the maximum

number of concurrent operations and the amount of parallelism for a resource group,

as well as limit the resource consumption for a resource group.


59/78



(1) Puntos

16 GB

4 GB (*)

8 GB

2 GB

Correcto Correct. The minimum recommended memory per core is 4 GB.

9. Which of the following can be used transparently by applications, without having

to change the application code? Marcar para Revisin

(1) Puntos



Oracle OLAP (*)

RAC (*)



60/78

Correcto Correct. Materialized views, Oracle OLAP, plan stabilization and RAC can all

be used transparently, without having to make changes to an application.

10. Exadata improves performance by _____. Marcar para Revisin

(1) Puntos


Increasing the size of the pipes. (*)

Increasing the amount of data required to flow through pipes.

Decreasing the size of the pipes.

Reducing the amount of data required to flow through pipes. (*)

Reducing constraint caused by data flow through pipes. (*)

Incorrecto Inorrect. Exadata gives you more pipes, bigger pipes and reduces the

amount of data flowing through those pipes to deliver increased performance.


(1) Puntos

On initial load (*)




61/78


Correcto Correct. Advanced Compression compresses data when it is initially loaded,

and compresses INSERTs and UPDATEs in batch.


(1) Puntos

Done by the CPU.

Done in memory.




13. True/False. Oracle Data Integrator allows you to monitor ETL sessions in real

time. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso


62/78

Correcto Correct. Oracle Data Integrator allows you to monitor ETL sessions in real

time.

14. Oracle Data Mining can take advantage of which of the following qualities of theOracle database? Marcar para Revisin

(1) Puntos


RAC (*)

Parallelism (*)

Security (*)


Correcto Correct. Data mining can take advantage of standard Oracle features, suchas parallelism, RAC, Enterprise Manager and security.

15. Oracle Data Mining, compared to SAS, provides which of the following

advantages? Marcar para Revisin

(1) Puntos





63/78



Incorrecto Incorrect. With Oracle Data Mining, you do not have to move data to a


Database.

16. For data warehousing, you can use RAC in which of the following ways? Marcar

para Revisin

(1) Puntos


To provide parallel query servers across nodes. (*)

To distribute workload across all nodes. (*)

To provide high availability for all operations. (*)

To distribute workload to some of the nodes. (*)

Correcto Correct. You can use RAC with a data warehouse to distribute workload to

all or some of the nodes in a cluster, to use parallel query services across the nodes,

and to provide standard high availability to data warehouse applications.


(1) Puntos


64/78

32

24

2

16

18 (*)

Correcto Correct. You can store up to 18 Exadata cells in a rack.

18. Which of the following dimensions is included in most data warehouses? Marcar

para Revisin

(1) Puntos

Location dimension

Product dimension

Cost dimension

Time dimension (*)

Correcto Correct. Most data warehouses include a time dimension.

19. The Database Result Cache can _____. Marcar para Revisin


65/78

(1) Puntos


Cache query execution plans

Cache returns from PL/SQL functions (*)

Cache PL/SQL code

Cache results from queries (*)

Incorrecto Incorrect. The Query Result Cache caches results from queries and

returns from PL/SQL functions.

20. Which of the following control structures can be defined as part of a data flow

with Oracle Data Integrator? Marcar para Revisin

(1) Puntos


GOTOs

Loops (*)

Error handling (*)

Conditions (*)


66/78

Correcto Correct. Loops, conditions and error handling can be defined as part of a

data flow with Oracle Data Integrator.

26. True/False. The SQL optimizer is aware of Oracle OLAP cubes. Marcar para

Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. The SQL optimizer is aware of Oracle OLAP cubes.

27. Which of the following statements are true about Oracle OLAP? Marcar para

Revisin

(1) Puntos


Oracle OLAP runs in the Oracle database. (*)

Oracle OLAP can be used with RAC. (*)

Oracle OLAP uses standard Oracle security. (*)

Meta data for Oracle OLAP is in a compatible data dictionary.

Correcto Correct. Oracle OLAP runs in the Oracle database and uses standard Oracle

security. Oracle OLAP can be used with RAC, but Oracle OLAP stores its meta data in

the Oracle data dictionary itself.


67/78

28. Interval partitioning delivers which of the following benefits? Marcar para

Revisin

(1) Puntos









(1) Puntos






68/78


Correcto Correct. The Oracle Warehouse Builder repository can import meta data

from Oracle tools and ERWin, among other tools, synchronize multi-user access tometadata and lock objects in the repository.

30. True/False. You can perform 'what-if' analysis of potential changes with Oracle

Warehouse Builder. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. You can perform 'what-if' analysis of potential changes with Oracle

Warehouse Builder.


Revisin

(1) Puntos

120 (*)

200

100

25

50


69/78

Correcto Correct. 120 Knowledge Modules come with Oracle Data Integrator.

32. True/False. Partitions should be used to load new data into data warehouse

tables. Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Incorrecto Incorrect. The EXCHANGE PARTITION command can be used to load data

into a data warehouse table.


(1) Puntos







70/78

Correcto Correct. Oracle Data Mining can be used to predict customer behaviour,

associate factors with a business issue, or determine associations within a population

to use for future marketing and sales actions.


Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. The Oracle Exadata Database Machine combines storage with

processing.

35. With Advanced Compression, you can compress _____. Marcar para Revisin

(1) Puntos


Backup data (*)

Unstructured data (*)

Structured data (*)

Network Transport (*)

Meta data


71/78

Incorrecto Incorrect. Advanced Compression can compress structured, unstructured

and backup data, as well as network traffic.

36. What are some of the advantages of using Oracle Data Integration? Marcar para

Revisin

(1) Puntos


It offers high availability at no additional costs

Can scale efficiently (*)

Takes advantage of the database optimizer (*)

No additional servers needed to implement ETL (*)

Correcto Correct. Some of the advantages of using Oracle Data Integration are no

additional servers needed to implement ETL, ODI takes advantage of the database

optimizer and ODI can scale efficiently.

37. Compression can be applied to which of the following? Marcar para Revisin

(1) Puntos


Partitions (*)


72/78

Tables (*)

Indexes (*)

Views

Correcto Correct. You can apply compression to tables, indexes or partitions.


Revisin(1) Puntos

15%

41% (*)

10%

22%

Correcto Correct. Oracle's market share for data warehousing is 41%.

39. Which of the following is true of a data warehouse? Marcar para Revisin

(1) Puntos

Data warehouse queries are simpler than OLTP queries.


73/78

The data warehouse is refreshed frequently in real time.

A data warehouse typically contains large amounts of data. (*)

Queries against a data warehouse do not include summarized information.

Incorrecto Incorrect. A data warehouse typically contains large amounts of data.

40. Exadata Storage Servers improve performance in which ways? Marcar para

Revisin(1) Puntos


More efficient memory usage

Moving some intelligence to smart scans in the Exadata cells (*)

Reducing the amount of I/O performed

Reducing the amount of rows returned to the server (*)

Incorrecto Incorrect. Exadata improves performance by offloading CPU funtions to

the cells and reducing the amount of data returned to the server.

41. Which of the following contributes to the improved performance of the Oracle

Exadata Database Machine? Marcar para Revisin

(1) Puntos


74/78


Proprietary high speed CPUs

InfiniBand switches (*)

Exadata Storage Server (*)

Correcto Correct. The InfiniBand switches allow for greater data flow, while the

Exadata Storage Server reduces the amount of data sent for processing.

42. True/False. Oracle Warehouse Builder allows you to graphically map data flows.

Marcar para Revisin

(1) Puntos

Verdadero (*)

Falso

Correcto Correct. Oracle Warehouse Builder allows you to graphically map data

flows.

43. Partitioning can improve performance due to which of the following reasons?

Marcar para Revisin

(1) Puntos

Partition-wise joins.


75/78

Partitioning doesn't improve performance.

Partition pruning by the optimizer.

Partition pruning and partition-wise joins. (*)

Correcto Correct. Both partition pruning and partition-wise joins improve the

performance of queries with partitioning.

44. For OLTP data, it is a good practice to compress _____. Marcar para Revisin(1) Puntos



Your largest tables



Correcto Correct. It makes sense to compress your largest tables and some of your

B*-tree indexes for an OLTP database.

45. Which of the following factors contribute to the performance of Oracle OLAP?

Marcar para Revisin

(1) Puntos


76/78


More efficent CPU operations

Offset addressing (*)

Dense arrays (*)

Incorrecto Incorrect. Both offset addressing (which allows fast access), and dense

arrays (which reduces I/O) deliver optimal performance for Oracle OLAP.


(1) Puntos

Verdadero (*)

Falso



47. Which of the following index types is particularly useful for data warehousing?

Marcar para Revisin

(1) Puntos

Invisible indexes

B*-tree indexes


77/78

Reverse indexes

Bitmap indexes (*)

Correcto Correct, bitmap indexes are particularly useful for data warehouses.


para Revisin

(1) Puntos





Correcto Correct. A data warehouse is primarily used for strategic purposes.

49. SecureFiles allows _____. Marcar para Revisin

(1) Puntos


Bit level security


78/78

Multiple levels of compression (*)

Partition-specified compression (*)

Random writes to SecureFiles (*)

Incorrecto Incorrect. SecureFiles allows random writes to SecureFiles, multiple

levels of compression and the ability to specify compression at the partition level.

50. Which is the fastest way to load data into an Oracle data warehouse? Marcar

para Revisin

(1) Puntos

SQL*Loader

Direct Path loading

External table using CREATE TABLE AS . . . SELECT (*)

Data Pump

Incorrecto Incorrect. Using an external table and CTAS is the fastest way to load

data.

presales data warehousing

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