[2021] 1Z1-083 Actual Exam Dumps, 1Z1-083 Practice Test
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Understanding functional and technical aspects of Oracle Database Administration II Exam Number: 1Z0-083
The following will be discussed in the ORACLE 1Z0-083 dumps pdf:
- Oracle Database 19c: New Features for Administrators
- Upgrade the Oracle Database
- Using General Overall Database Enhancements
- Oracle Restart
- Using Availability Enhancements
- Monitoring and Tuning Database Performance
- Oracle Database: Administration Workshop
- Oracle Database 18c: New Features
- Install Grid Infrastructure for a Standalone server
- Upgrading to Oracle Grid Infrastructure
NEW QUESTION 16
A database is configured in ARCHIVELOG mode.
A full RMAN backup exists but no control file backup to trace has been taken. A media failure has occurred.
In which two scenarios is incomplete recovery required? (Choose two.)
- A. after losing all copies of the control file
- B. after losing all members of an INACTIVE online redo log group
- C. after losing all members of the CURRENT online redo log group
- D. after losing an UNDO tablespace that is in use
- E. after losing a SYSAUX tablespace data file
Answer: A,C
NEW QUESTION 17
Which three methods can be used for heap table data migration after upgrading a database? (Choose three.)
- A. using operating system file copy utilities
- B. using the CREATE TABLE AS SELECT SQL statement
- C. using Database Replay
- D. using Oracle Data Pump
- E. using Database Upgrade Assistant
- F. using SQL Developer
Answer: B,D,E
Explanation:
Explanation
https://www.oracle.com/a/tech/docs/twp-upgrade-oracle-database-19c.pdf
NEW QUESTION 18
A database is configured in ARCHIVELOG mode.
Full RMAN backups are taken and no backup to trace has been taken of the control file. A media failure has occurred.
In which two scenarios is complete recovery possible? (Choose two.)
- A. after losing an archived log from before the most recent backup
- B. after losing an archived log from after the most recent backup
- C. after losing all copies of the control file
- D. after losing the SYSTEM tablespace
- E. when any archived log from, before, or after the most recent backup is corrupt.
Answer: A,D
NEW QUESTION 19
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 retentionperiod defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
- B. Flashback logs areautomatically 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.
Answer: C,D
NEW QUESTION 20
Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed:
Which three are true?
- A. A default service Is created for the application root APP1.
- B. Application PDBs that are subsequently created in the APP1 application container will be cloned from APP1$SEED.
- C. APP1 can never be unplugged.
- D. An application root PDB is created for APP1.
- E. An application seed PDB Is created for APP1.
- F. Application PDBs that are subsequently created in the APP1 application container will be cloned from PDB$SEED.
Answer: A,B,D
NEW QUESTION 21
Examine this configuration:
1. CDB1 is a container database.
2. PDB1 and PDB2 are pluggable databases in CDB1.
You execute these commands successfully:
Which two are true?
- A. PDB1 and PDB2 are in mount state.
- B. PDB1 and PDB2 are in read only state.
- C. Redo logs are opened.
- D. CDB$ROOT is in mount state.
- E. PDB$SEED is in read only state.
Answer: B,C
NEW QUESTION 22
Which three are true about opatchauto? (Choose three.)
- A. It must be invoked by a user with root user privileges.
- B. It requires the Oracle Grid Infrastructure and Oracle Database instances to be shut down before being invoked.
- C. Users must always input patch plans to opatchauto.
- D. It performs a shutdown and then a restart of all processes in both Oracle Grid Infrastructure and Oracle Database home during the patching process.
- E. It applies patches in nonrolling mode by default.
- F. It is used to apply interim patches to Oracle Grid Infrastructure and Oracle Database home combinations.
- G. Patches are applied via opatchauto.
Answer: A,D,G
NEW QUESTION 23
Which three are true about the SQL Tuning Advisor? (Choose three.)
- A. It considers all SQL statements being analyzed by the advisor task as a group.
- B. It checks each query being analyzed for missing statistics.
- C. It only recommends syntactic changes to SQL statements.
- D. It checks each query being analyzed for stale statistics.
- E. It builds SQL profiles for each poorly performing SQL statement to prevent regressions.
- F. It can recommend semantic changes to SQL statements.
Answer: B,D,E
NEW QUESTION 24
Which two are true about diagnosing Oracle Database failure situations using Data Recovery Advisor?
(Choose two.)
- A. A failure can be closed only when it has been repaired.
- B. Data Recovery Advisor can be used if a database is closed.
- C. Data Recovery Advisor can proactively check for failures.
- D. The Data Recovery Advisor CHANGE FAILUREcommand can be used only to change failure priorities.
- E. Using the Data Recovery Advisor LIST FAILUREcommand always requires that the database for which failures are to be listed is in MOUNTstate.
Answer: C,D
Explanation:
Explanation/Reference:
NEW QUESTION 25
Which three are true about Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the Manageability Monitor (MMON) background process? (Choose three.)
- A. AWR snapshots must be deleted when no longer required by ADDM.
- B. ADDM can recommend extending the buffer cache.
- C. ADDM performs its analysis only when a DBA requests it.
- D. By default, AWR snapshots are automatically purged after eight days.
- E. By default, MMON creates an AWR snapshot every 30 minutes.
- F. ADDM can recommend shrinking the buffer cache.
Answer: A,D,F
NEW QUESTION 26
Which two are true about gathering optimizer statistics? (Choose two.)
- A. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open PDBs except PDB$SEED.
- B. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)
- C. System statistics can be gathered only while connected to CDB$ROOT.
- D. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB opened in read/write mode gathers object statistics for that PDB.
- E. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics only in CDB$ROOT.
Answer: B,E
NEW QUESTION 27
Examine this configuration:
1. CDB1 is a container database running in archivelog mode.
2. Multiple uncommitted transactions are running in CDB1.
3. Redo log groups 1 and 2 are inactive.
4. Redo log group 3 is the current group.
All members of redo log group 3 are lost before it is archived. Examine these possible steps:
1. SHUTDOWN ABORT
2. STARTUP NOMOUNT
3. STARTUP MOUNT
4. ALTER DATABASE MOUNT
5. RESTORE DATABASE
6. RECOVER DATABASE NOREDO
7. RECOVER DATABASE UNTIL AVAILABLE
8. RESTORE ARCHIVELOG ALL
9. ALTER DATABASE OPEN
10. ALTER DATABASE OPEN RESETLOGS
Choose the minimum required steps in the correct order to recover the database.
- A. 1, 3, 5, 7, 10
- B. 1, 3, 5, 6, 10
- C. 1, 2, 5, 7, 4, 10
- D. 1, 3, 5, 6, 9
- E. 1, 3, 5, 6, 10
- F. 1, 3, 5, 8, 6, 10
Answer: B
NEW QUESTION 28
While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup is taking too long and suspect a performance bottleneck.
Which three are true about diagnosing and tuning these problems? (Choose three.)
- A. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.
- B. Setting DBWR_IO_SLAVESto a non zero value can improve backup performance when using asynchronous I/O/
- C. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
- D. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.
- E. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.
- F. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
- G. If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
Answer: D,F,G
NEW QUESTION 29
Which three are true about Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the Manageability Monitor (MMON) background process? (Choose three.)
- A. AWR snapshots must be deleted when no longer required by ADDM.
- B. ADDM can recommend extending the buffer cache.
- C. ADDM performs its analysis only when a DBA requests it.
- D. By default, AWR snapshots are automatically purged after eight days.
- E. By default, MMON creates an AWR snapshot every 30 minutes.
- F. ADDM can recommend shrinking the buffer cache.
Answer: B,D,F
NEW QUESTION 30
Examine this configuration:
You execute these commands before upgrading the database to the current release:
For which databases will fixup scripts be created?
- A. CDB1 and PDB$SEED only
- B. CDB1, PDB$SEED, and PDB1 only
- C. PDB$SEED, PDB1, and PDB2 only
- D. CDB1, PDB1, and PDB2 only
- E. CDB1, PDB$SEED, PDB1, and PDB2
Answer: A,C
NEW QUESTION 31
Which three methods can be used for heap table data migration after upgrading a database? (Choose three.)
- A. using operating system file copy utilities
- B. using the CREATE TABLE AS SELECT SQL statement
- C. using Database Replay
- D. using Oracle Data Pump
- E. using Database Upgrade Assistant
- F. using SQL Developer
Answer: B,D,F
Explanation:
Explanation
https://www.oracle.com/a/tech/docs/twp-upgrade-oracle-database-19c.pdf
NEW QUESTION 32
Automatic Shared Memory Management is disabled for one of your database instances.
Some SQL statements perform poorly due to excessive hard parse activity, thereby degrading performance.
What would be your next step?
- A. Run the Memory Advisor for the Program Global Area.
- B. Run the SQL Access Advisor.
- C. Run the SQL Tuning Advisor.
- D. Run the Memory Advisor for the System Global Area.
- E. Run the Memory Advisor for the shared pool.
Answer: D
NEW QUESTION 33
Which four are true about performing Tablespace Point-In-Time Recovery (TSPITR) using Recovery Manager (RMAN)?
- A. RMAN always includes tablespaces containing undo segments in the recovery set.
- B. It can be performed using an auxiliary instance managed by a DBA.
- C. It can be performed using an auxiliary instance managed by RMAN.
- D. It can be used to recover a dropped tablespace.
- E. It can be performed repeatedly until the correct time is found without using an RMAN catalog.
- F. RMAN automatically adds any required tablespaces to the recovery set to make it self-contained.
- G. flashback database must be enabled for it to work.
- H. It can be used to recover a truncated table.
Answer: B,C,E,G
NEW QUESTION 34
Which three are true about monitoring waits for sessions and services? (Choose three.)
- A. V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.
- B. V$SESSION_WAIT and V$SESSION both contain details of the event on which a session is currently waiting.
- C. V$SESSION_EVENT displays all waits for all past sessions if the wait has occurred at least once for a session.
- D. V$SERVICE_EVENT displays all waits for all services if the wait has occurred at least once for a service.
- E. V$SESSION_EVENT displays all waits for all past and existing sessions if the wait has occurred at least once for a session.
- F. V$SESSION_WAIT_CLASS displays waits broken down by wait class only for waiting sessions.
Answer: A,C,D
NEW QUESTION 35
Which two are true about OS groups and users for Oracle Grid Infrastructure and the Oracle Relational Database Management System (RDBMS)? (Choose two.)
- A. The Oracle Grid Infrastructure owner must have OSOPER, OSBACKUPDBA, and OSKMDBA as secondary groups.
- B. The Oracle Grid Infrastructure owner owns Oracle Restart and Oracle Automatic Storage Management binaries.
- C. The same OSDBA group must be used for Automatic Storage Management and the Oracle Database.
- D. The Oracle Grid Infrastructure installation must be owned by the grid user.
- E. The primary group for the Oracle Grid Infrastructure and Oracle Database owners must be the Oracle Inventory group.
- F. By default, members of the OSASM group can access Automatic Storage Management and RDBMS instances.
Answer: A,C
Explanation:
Reference:
https://docs.oracle.com/database/121/CWWIN/usrgrps.htm#CWWIN-GUID-6FD3C6AE-5A99- 4C6D-85D6-868CBA6F5DAE
NEW QUESTION 36
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What is Oracle Database Administration II Exam Number: 1Z0-083 Certification Exam and Retake policy
Oracle Cloud Certification credentials are only valid for a period of 18 months from the date you earn the credential. The certification will become inactive at the end of 18 months. However, for Oracle candidates, it is necessary to hold an active certification in order to have access to various certification benefits including, using Oracle certification logos, certificates, scoring reports, digital badges, and certification verification.
To stay current, candidates have to re-certify themselves with the latest version of the exam. Oracle Cloud Certifications include various titles with levels that are Oracle Certified Associate, Specialist, and Professional. Moreover, the Oracle Cloud Certifications are updated continuously throughout the year for keeping current with major product and service releases and re-released on an annual basis with a new title.
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