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Database Performance and Tuning Essentials 2015

Question No: 1

Which one would SQL Access Advisor use as input to provide a recommendation on a partition or index?

  1. SQL Tuning Advisor

  2. Automatic Workload Repository

  3. Automatic Diagnostic Monitor

  4. SQL Tuning SetE. SQL Error

Answer: A

Question No: 2

Which two are functionalities of Oracle Real Application Testing?

  1. Database Replay

  2. SQL Query Sets (SQS)

  3. SQL Tuning Analyzer

  4. SQL Performance Analyzer (SPA)

  5. Real Application Cluster Replay

Answer: A,E

Question No: 3

Which is a capability that Active Session History (ASH) reports enable you to perform?

  1. Compare database performance between two periods of time, and resolve performance degradation thatmay happen from one time period to another.

  2. Analyze transient performance problems with the database that are short-lived and do not appear in theADDM analysis.

  3. Optimize the performance of data access paths by creating the proper set of materialized views,materialized view logs, and indexes for a given workload.

  4. Analyze transient performance problems that have happened in the database since it has been started.

Answer: A

Question No: 4

Which two statements are true about Oracle Enterprise Manager Database Express?

  1. It uses internal infrastructure components, such as XDB and SQL*NET.

  2. It can perform actions inside and outside the database.

  3. Performance Hub and Composite Active Reports are its key functionalities.

  4. It is not supported on Oracle Standard Edition or Express Edition.

  5. It replaces Oracle Grid Control.

Answer: A,C

Reference: http://www.oracle.com/technetwork/database/manageability/emx-intro- 1965965.html

Question No: 5

Which two could Oracle Database Replay is used to validate performance?

  1. applying workload to an application after an operating system patch

  2. applying a workload from one database release to another database release

  3. moving a workload from a single database instance and applying it to an Oracle Real Application Cluster(RAC)

  4. to check and compare if a specific set of SQL statements have regressed between two different databasereleases

  5. to find the least-used SQL statement

Answer: A,C

Question No: 6

An advanced fault diagnostic infrastructure introduced as of Oracle Database 11g, assigns an incidentnumber and diagnostic data when a critical error occurs. What is the feature and where does it store that data?

  1. Oracle Enterprise Manager. Data is stored in the OEM Repository.

  2. MyOracle Support. Data is stored in Oracle Cloud.

  3. Automatic Workload Repository. Data is stored in views inside the Oracle database.

  4. Automatic Diagnostic Repository. Data is stored in views inside the Oracle database.

  5. Automatic Diagnostic Repository. Data is stored in a file-based repository outside the database.

Answer: E Explanation:

The data is then stored in the Automatic Diagnostic Repository (ADR) – a file-based repository outside the database

Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28310/diag001.htm

Question No: 7

Which two statements are true about Automatic Statistics collection by the Optimizer?

  1. Statistics are collected during automatic maintenance tasks.

  2. Any fixed objects are disregarded.

  3. Any external tables are incorporated.

  4. All tables in the data dictionary are included by defaults.

  5. Statistics are gathered after table statistics are marked stale.

Answer: A,E

Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28274/stats.htm

Question No: 8

When providing partition and index recommendations, which one would SQL Access Advisor source input from?

  1. SQL Tuning Advisor

  2. Automatic Workload Repository

  3. Automatic Database Diagnostic Monitor

  4. SQL Tuning Set

Answer: D

Question No: 9

When planning an Oracle Database architecture, which are three caching functionalities that would improve application response time and speed up query processing?

  1. Result Cache

  2. Mega Cache

  3. Oracle In-Memory Database Cache

  4. Database Smart Flash Cache

  5. Oracle In-Memory DBSTATS Cache

Answer: A,C,D

Question No: 10

What are two reasons for which the Diagnostics and Tuning packs are essential to ongoing maintenance of an Oracle Database?

  1. With Diagnostics and Tuning Packs installed, an Oracle database recovers easily from a crash orcorruption.

  2. Oracle Databases are constantly changing; more users, data added and deleted, varying SQL atapplication level.

  3. Diagnostics and Tuning Packs are needed to keepOracle Database table and index statistics current.

  4. Inefficient “Bad” application SQL can be detected by Diagnostics Pack and then optimized utilizing TuningPack SQL Profiles, even if it can#39;t be changed at the application end.

  5. Diagnostics and Tuning packs are a prerequisite for a customer to license Oracle Database EnterpriseEdition.

Answer: C,E

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