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Oracle 1Z0-515

Data Warehousing 11g Essentials

Questions and Answers : 70
Q&A Update On : September 22, 2017
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Oracle 1Z0-515

Data Warehousing 11g Essentials

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    Oracle 1Z0-515 (Data Warehousing 11g Essentials)

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1Z0-515 Questions and Answers

Microsoft Word - 1Z0-515


QUESTION: 59

Identify the statement about Oracle OLAP that is NOT true.


  1. Oracle OLAP cubes are stored in the Oracle relational database

  2. Oracle OLAP uses standard Oracle database security.

  3. Meta data for Oracle OLAP is accessible in an external data dictionary

  4. Oracle OU\P can be deployed using RAC.


Answer: A


Explanation:

http://download.oracle.com/docs/cd/B28359_01/olap.111/b28124/whatsnew.htm According to the answer; "Oracle OLAP uses standard Oracle database security." is a false statement and "Meta data for Oracle OLAP is accessible in an external data dictionary" is a correct statement.

But in Oracle documentation,

http://download.oracle.com/docs/cd/E11882_01/olap.112/e17123/overview.htm#i1

011393 ; is says "With Oracle OLAP, standard Oracle Database security features are used to secure your multidimensional data.".


QUESTION: 60

Identity the true statement about a data warehouse


  1. The data warehouse is typically refreshed as often as a transactional system,

  2. Data warehouse queries are simpler than OLTP queries.

  3. A data warehouse typically contains historical data.

  4. Queries against a data warehouse never need summarized information.


Answer: C


Explanation:

http://wiki.oracle.com/page/Oracle+OLAP+Terminology-D


QUESTION: 61

Identify the statement about ASM that is NOT true.


  1. ASM is easier to manage than file systems.

  2. ASM delivers the performance of raw partitions.


  3. ASM is an extra cost option for Oracle databases.

  4. ASM delivers automatic striping and mirroring.


Answer: B


Explanation:

http://download.oracle.com/docs/cd/B28359_01/server.111/b31107/asmprepare.htm


QUESTION: 62

Which two statements are true about the advantages of using a data warehouse?


  1. A data warehouse uses fewer database structures, so access to answers is faster and easier

  2. A data warehouse is typically implemented with a different design, making access faster.

  3. A data warehouse is optimized for ongoing write activity, making response faster.

  4. A data warehouse uses specialized features of the Oracle database, like materialized views and star transformations, making response faster.


Answer: A, D


QUESTION: 63

What are two ways in which query performance can be improved with partitioning?


  1. Partition pruning

  2. Partition optimization

  3. Partition compression

  4. Partition-wise joins


Answer: A, D


QUESTION: 64

Your customer is looking to implement ad-hoc analysis in a data warehouse. Which approach is least likely to be used assuming that the customer does not want the expense of managing view?


  1. Star schema

  2. Snowflake schema


  3. Third normal form schema

  4. OLAP


Answer: A


QUESTION: 65

You have analyzed your client's workload and the Materialized Views Advisor in Enterprise Manager recommends that you create some materialized views to improve performance. What should you do in order to most simply implement this change?


  1. Rewrite all the queries in the application to identify materialized view

  2. Rewrite existing queries. New queries will automatically use the views.

  3. Respond positively to the Advisor to create the materialized views.

  4. Build virtual views on a third normal form schema.


Answer: C


QUESTION: 66

A Full Rack Oracle Exadata Database Machine can contain 100 TB of disk space with high performance. How much user data should you conservatively estimate this configuration can hold?


  1. 100 TB

  2. 75 TB

  3. 50 TB

  4. 28 TB

  5. 20 TB


Answer: A


QUESTION: 67

What would you do to compress data in partitions that are frequently updated in Oracle Database11g?


  1. Use Hybrid Columnar Compression.

  2. Use Advanced Compression Option.


  3. Use Hybrid Partitions.

  4. Avoid compressing any data.


Answer: A


Explanation:

http://blogs.oracle.com/datawarehousing/2010/01/new_whitepaper_on_exadata_hybr.html


QUESTION: 68

The Analytic Workspace Manager would be used to generate .


  1. Materialized views

  2. Oracle OLAP Option cubes

  3. Oracle Data Mining algorithms

  4. Oracle SQL Analytic functions


Answer: B


Explanation:

http://forums.oracle.com/forums/thread.jspa?threadID=616811


QUESTION: 69

Which feature of Oracle Warehouse Builder can be used to help ensure data quality?


  1. Data extraction

  2. Data profiling

  3. Logical mapping

  4. Exception reporting


Answer: A


QUESTION: 70

Flash in the Oracle Exadata Database Machine is of lower latency (and enables faster access to data) than:


  1. Memory


  2. Memory and locally attached disk

  3. Memory and network-attached disk

  4. Locally attached and network-attached disk


Answer: B

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