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Database Performance and Tuning Essentials 2015

Question No: 31

Which three are controllable by a resource plan, when you are using the Oracle Database 12c Multitenant option?

  1. CPU

  2. concurrent sessions

  3. SGA

  4. network I/O

  5. ability to use parallel server processes

  6. use of SGA memory and ability to allocate PGA

Answer: A,B,E Explanation: Section: (none) Explanation

Question No: 32

Instead of a database automatically publishing statistics when statistics collection ends, you want to test queries a satisfactory result before they are made available to the entire database. Which would you configure for that to occur?

  1. SetOPTIMIZER_USE_PENDING_STATISTICStoTRUE.

  2. SetAUTO_UPDATE_STATISTICStoFALSE.

  3. Use aHOLD HINTin the SQL.

  4. SetAUTOMATIC_WORKLOAD_REPOSITORY_COLLECTIONtoPAUSE.

Answer: A

Question No: 33

When performing performance analysis of Oracle Real Application Cluster (RAC) databases, what are three Automatic Database Diagnostics Monitoring (ADDM) analysis modes that are available?

  1. Database

  2. Instance

  3. Partial

  4. Sample

  5. Average

Answer: A,B,C

Question No: 34

You are reviewing an Automatic Database Diagnostic Monitor report. What is DB Time% a percentage of?

  1. total CPU time

  2. elapsed response time

  3. total time in database calls by all processes

  4. total time in V$ views

  5. time that users wait for the database to respond

Answer: C

Question No: 35

A customer seeks capability to measure and test database performance before and after application changes. Which would you implement to meet that requirement?

  1. Oracle Performance Analyzer

  2. Oracle Application Performance Analyzer

  3. Oracle Real Application Testing

  4. Oracle SQL Developer

  5. Oracle Spatial and Graph

Answer: E

Question No: 36

What are three activities an Oracle Database Performance and Tuning solution enables a customer to perform?

  1. standardize database troubleshooting and diagnostics

  2. control database clouds.

  3. automate database performance management

  4. perform global database backup

  5. outsource database operations

  6. replay and test actual workloads to assure database performance and consolidatios.

Answer: C,D,E

Question No: 37

You have been asked to provide a “technology update” to a long time Oracle Database customer. During the meeting, you are asked about Oracle Enterprise ManagerDatabase Express in Oracle Database 12c.

Identify three of its capabilities you would share with the customer.

  1. Once Oracle Database 12c is installed, a DBA runs the separate Oracle Enterprise Manager DatabaseExpress installer to add it into the database console.

  2. The Oracle Enterprise Manager Database Express Performance HUB organizes and provides aconsolidated viewof real-time and historical performance data.

  3. The Database Express Performance HUB displays Oracle RAC specific metrics.

  4. Oracle Enterprise Manager Database Express can be extended by the user to also display Oracle 7-10gdatabases.

  5. Oracle Enterprise Manager Database Express does not require any separate middle-tier componentsbecause it uses XDB and SQL*NET.

  6. The Oracle enterprise Manager Database Express Performance Hub displays Oracle RAC specific metricswhen the optional RAC Pack is licensed.

Answer: A,E,F

Question No: 38

Which background process performs Automatic Workload Repository (AWR) tasks such as writing when a metric violates its threshold value, taking snapshots, and capturing statistics for recently modified SQL objects?

  1. LGWR

  2. DBWR

  3. CKPT

  4. MMON

  5. MMNL

Answer: D Explanation:

Themanageability monitor process (MMON)performs many tasks related to theAutomatic Workload Repository (AWR). For example, MMON writes when ametricviolates its threshold value, taking snapshots, and capturing statistics value for recently modified SQL objects.

Reference:

https://docs.oracle.com/cd/E11882_01/server.112/e40540/process.htm#CNCPT008

Question No: 39

Which action can beperformed by using Oracle Enterprise Manager Database Express Performance Hub?

  1. View health status and performance of an Oracle Database instance via Database Control.

  2. Launch and view STATSPACK reports.

  3. View real-time and historical Oracle Database performance information.

  4. View only real-time Oracle Database performance information.

  5. View only historical Oracle Database performance information.

  6. Consolidate ADDM, AWR, and ASH repositories within an enterprise and enable centralized performancereporting.

Answer: C

Question No: 40

Which is the default statistics gatheringperiod for Automatic Database Diagnostics Monitoring (ADDM)?

  1. every 30 seconds

  2. every 60 minutes

  3. every 30 minutes

  4. every 24 hoursE. every 40 hours

Answer: A

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