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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?
-
SQL Tuning Advisor
-
Automatic Workload Repository
-
Automatic Diagnostic Monitor
-
SQL Tuning SetE. SQL Error
Answer: A
Question No: 2
Which two are functionalities of Oracle Real Application Testing?
-
Database Replay
-
SQL Query Sets (SQS)
-
SQL Tuning Analyzer
-
SQL Performance Analyzer (SPA)
-
Real Application Cluster Replay
Answer: A,E
Question No: 3
Which is a capability that Active Session History (ASH) reports enable you to perform?
-
Compare database performance between two periods of time, and resolve performance degradation thatmay happen from one time period to another.
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Analyze transient performance problems with the database that are short-lived and do not appear in theADDM analysis.
-
Optimize the performance of data access paths by creating the proper set of materialized views,materialized view logs, and indexes for a given workload.
-
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?
-
It uses internal infrastructure components, such as XDB and SQL*NET.
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It can perform actions inside and outside the database.
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Performance Hub and Composite Active Reports are its key functionalities.
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It is not supported on Oracle Standard Edition or Express Edition.
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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?
-
applying workload to an application after an operating system patch
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applying a workload from one database release to another database release
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moving a workload from a single database instance and applying it to an Oracle Real Application Cluster(RAC)
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to check and compare if a specific set of SQL statements have regressed between two different databasereleases
-
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?
-
Oracle Enterprise Manager. Data is stored in the OEM Repository.
-
MyOracle Support. Data is stored in Oracle Cloud.
-
Automatic Workload Repository. Data is stored in views inside the Oracle database.
-
Automatic Diagnostic Repository. Data is stored in views inside the Oracle database.
-
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?
-
Statistics are collected during automatic maintenance tasks.
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Any fixed objects are disregarded.
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Any external tables are incorporated.
-
All tables in the data dictionary are included by defaults.
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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?
-
SQL Tuning Advisor
-
Automatic Workload Repository
-
Automatic Database Diagnostic Monitor
-
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?
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Result Cache
-
Mega Cache
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Oracle In-Memory Database Cache
-
Database Smart Flash Cache
-
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?
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With Diagnostics and Tuning Packs installed, an Oracle database recovers easily from a crash orcorruption.
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Oracle Databases are constantly changing; more users, data added and deleted, varying SQL atapplication level.
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Diagnostics and Tuning Packs are needed to keepOracle Database table and index statistics current.
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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.
-
Diagnostics and Tuning packs are a prerequisite for a customer to license Oracle Database EnterpriseEdition.
Answer: C,E
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