信頼的な1Z0-083最新知識一回合格-効率的な1Z0-083合格問題

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Oracle 1Z0-083 Exam Syllabus Topics:

Section	Objectives
Security Management	- Database auditing and encryption - User management and privileges
Performance Management	- Automatic Workload Repository (AWR) and diagnostics - SQL performance tuning
Database Architecture and Administration	- Multitenant container database (CDB/PDB) concepts - Oracle Database architecture components
Storage and Space Management	- Tablespaces and datafiles - Segment management
Database Backup and Recovery	- RMAN configuration and backup strategies - Database recovery techniques

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正確的-信頼的な1Z0-083最新知識試験-試験の準備方法1Z0-083合格問題

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Oracle Database Administration II 認定 1Z0-083 試験問題 (Q165-Q170):

質問 # 165
Which four are true about performance-related Oracle tools?

A. The Automatic Database Diagnostic Monitor (ADDM) Compare Period report can compare two consecutive periods.
B. SQL Performance Analyzer can identify regressed SQL statements.
C. Database Replay always uses one replay client for all the original database sessions.
D. Database Replay always uses one replay client for each original database session.
E. The Active Session History (ASH) report is based on wait event samples.
F. The Automatic Database Diagnostic Monitor (ADDM) Compare Period report can compare two non-consecutive periods.
G. SQL Performance Analyzer can suggest schema changes.

正解：A、B、F、G

質問 # 166
Which three are true about patchsets? (Choose three.)

A. They can be applied in a rolling fashion for Clusterware and the databases.
B. They are only released quarterly.
C. They are installed via OPatch or OPatchAuto.
D. A base release is not needed to install patchsets.
E. Installing a patchset is considered an "upgrade".
F. They can introduce new features.

正解：D、E、F

解説：
A: False - Can be applied rolling for clusterware only, because that's the only one we have multiple environments. Not for databases.
C: False - We can install via the OUI, the Oracle Universal Installer
E: False - Its about PSU . They are released quarterly. Apply it on top of any given patch set. So they are cumulative patches.

質問 # 167
Choose two. When backing up to the Oracle Fast Recovery Area (FRA), you determine that the backup takes too long and suspect a performance bottleneck. Which two are true about diagnosing and tuning these problems?

A. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
B. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
C. If an RMAN BACKUP VALIDATE command takesroughly the same time as an actual backup, then read I/O is a likely bottleneck.F
D. If an RMAN BACKUP VALIDATE command takes noticeably less time than an actual backup, then write I/O is a likely bottleneck.
E. If an RMAN BACKUP VALIDATE command takesroughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.

正解：A、B、D

質問 # 168
Which two are true about flashback features in Oracle Database 19c and later releases? (Choose two.)

A. Flashback logs are monitored for being older than the retention period defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
B. Flashback logs are automatically purged when DB_FLASHBACK_RETENTION_TARGET is set lower than the time they have already been retained.
C. Flashback logs are automatically purged whenever the value of DB_FLASHBACK_RETENTION_TARGET is changed.
D. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET only after there is space pressure.
E. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET before there is space pressure.

正解：B、E

質問 # 169
Which two are true about the Automatic Database Diasnostic Monitor (ADDM)? (Choose two.)

A. It analyzes a period of time corresponding to the 12 hours of activity.
B. Results are written to the alert log.
C. It runs automatically after each AWR snapshot.
D. It analyzes a period of time corresponding to the last day of activity.
E. A DBA can run it manually.

正解：C、E

解説：
An ADDM analysis task is performed and its findings and recommendations stored in the database every time an AWR snapshot is taken provided the STATISTICS_LEVEL parameter is set to TYPICAL or ALL.
The time period analyzed by ADDM is defined by the last two snapshots (the last hour by default).

質問 # 170
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