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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:
- RMAN Troubleshooting and Tuning
- Duplicating a Database
- Transporting Data
- Diagnosing Failures
- Restore and Recovery Concepts
- Performing Recovery
- Oracle Database: Deploy, Patch and Upgrade Workshop
- Using Flashback Technologies
- Creating an Oracle Database by using DBCA
- Patching Grid Infrastructure and Oracle Database
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NEW QUESTION 83
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 DATABSE
6. RECOVER DATABASE NOREDO
7. RECOVER DATABASE UNTIL AVAILABLE
8. RESTORE ARCHIVELOG ALL
9. ALTER DATABSE OPEN
10.ALTER DATABASE OPEB RESETLOGS
Choose the minimum required steps in the correct order to recover the database.
- A. 1, 3, 5, 7, 10
- B. 1, 2, 5, 7, 4, 10
- C. 1, 3, 5, 6, 9
- D. 1, 3, 5, 8, 6, 10
- E. 1, 3, 5, 6, 10
Answer: E
NEW QUESTION 84
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 same OSDBA group must be used for Automatic Storage Management and the Oracle Database.
- B. The Oracle Grid Infrastructure owner owns Oracle Restart and Oracle Automatic Storage Management binaries.
- C. The primary group for the Oracle Grid Infrastructure and Oracle Database owners must be the Oracle Inventory group.
- D. The Oracle Grid Infrastructure installation must be owned by the grid user.
- E. The Oracle Grid Infrastructure owner must have OSOPER, OSBACKUPDBA, and OSKMDBA as secondary groups.
- F. By default, members of the OSASM group can access Automatic Storage Management and RDBMS instances.
Answer: B,C
NEW QUESTION 85
A user complains about poor database performance.
You want to verify if the user's session has waited for certain types of I/O activity. Which view displays all waits waited on by a session at least once?
- A. V$SESSION
- B. V$SESSTAT
- C. V$SESSION_WAIT
- D. V$SESSION_WAIT_CLASS
- E. V$SESSION_EVENT
Answer: E
NEW QUESTION 86
Which three are true about requirements for various flashback operations?
- A. flashback drop requires undo to retrieve all versions of a row that existed between two points in time.
- B. flashback transaction query requires undo to retrieve all versions of a row that existed between two points in time.
- C. flashback version query requires undo to retrieve all versions of a row that existed between two points in time.
- D. flashback drop requires that the recyclebin parameter be set to on.
- E. flashback version query requires that the recyclebin parameter be set to on.
- F. flashback data archive requires undo to store all versions of all rows of a table being tracked.
Answer: A,C,F
NEW QUESTION 87
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
Explanation:
Reference:
https://docs.oracle.com/database/121/TGSQL/tgsql_sqltune.htm#TGSQL540
NEW QUESTION 88
Which two are true about the Oracle dataabsemethodology? (Choose two.)
- A. The Oracle Database time model should be used to find the database and instance areas most in need of tuning.
- B. Tuning activities should stop onceagreed service levels for performance have been met.
- C. The database instance memory should always be tuned before tuning any file systems.
- D. Tuning activities should stop once the user is satisfied with performance.
- E. SQL statements should always be tuned before tuning any file systems.
- F. The alert log should be used to find the database and instance areas most in need of tuning.
Answer: B,F
NEW QUESTION 89
Examine this configuration:
To recover from this critical failure, you execute these commands:
What will be the outcome?
A)
B)
C)
D)
E)
- A. Option D
- B. Option B
- C. Option E
- D. Option A
- E. Option C
Answer: D
NEW QUESTION 90
Which two are true about Oracle Flashback features? (Choose two.)
- A. After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.
- B. FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
- C. FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
- D. FLASHBACK DROP can undrop an index when undropping a table.
- E. FLASHBACK TABLE can undrop a column.
Answer: A,D
NEW QUESTION 91
Examine this configuration:
1. The ORCLdatabase data files are in Automatic Storage Management (Oracle ASM) disk group +DATA.
2. ORCLuses disk group +FRAfor the Fast Recovery Area.
3. LISTENER is the listener for ORCL.
4. The database, listener, ASM instance, and ASM disk groups are managed by Oracle Restart.
5. All components are currently shut down.
You execute this command:
What is the outcome?
- A. Only the ORCLdatabase instance, the Oracle ASM instance, and the +DATAand +FRAdisk groups are started.
- B. The ORCL database, the Oracle ASM instances, the +DATAand +FRAdisk groups, and the LISTENER are started.
- C. Only the ORCLdatabase instance and the +DATAand +FRAdisk groups are started.
- D. Only the ORCLdatabase and the ASM instances are started.
- E. Only the ORCL database instance is started.
Answer: A
NEW QUESTION 92
For which two requirements can you use the USER_TABLESPACE clause with the CREATE PLUGGABLE DATABASE command? (Choose two.)
- A. to exclude a temp tablespace when plugging in a PDB
- B. to specify a default tablespace in a PDB cloned from another PDB in the same CDB.
- C. to specify the list of user tablespaces to include when moving a non-CDB to a PDB
- D. to specify the list of tablespaces to include when creating a PDB from the CDB seed
- E. to include specific user tablespaces only when relocating a PDB
- F. to exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB
Answer: A,D
NEW QUESTION 93
Which three are true about backup, restore, and recovery operations done without using Recovery Manager (RMAN)? (Choose three.)
- A. Oracle data file backups, copied using an O/S utility, can be added to the RMAN catalog as IMAGE COPIES.
- B. An Oracle database can be restored from backup files copied using O/S utilities.
- C. Backing up a database in NOARCHIVELOG mode using O/S utilities requires that the database instance be started and the dataabse be in the MOUNT state.
- D. Backing up a database in NOARCHIVELOG mode using O/S utilities requires that the database instance be shut down.
- E. Backing up a database in ARCHIVELOG mode using O/S utilities requires that the database instance be started and the database be in MOUNT state.
- F. Oracle archive log backups, copied using an O/S utility, can be added to the RMAN catalog as a backup set.
- G. Backing up a database in ARCHIVELOG mode using O/S utilities requires that the database instance be started and the database be in OPEN state.
Answer: A,D,E
NEW QUESTION 94
Which two are true about Rapid Home Provisioning (RHP), which has been available since Orcale 18c? (Choose two.)
- A. It can be used to provision applications.
- B. It cannot be used to upgrade Oracle Database homes.
- C. It can be used to provision middleware.
- D. It can be used to patch Grid Infrastructure homes containing Oracle Restart.
- E. It is an Oracle Database service
Answer: C,D
Explanation:
Reference:
https://www.oracle.com/assets/rapid-home-provisioning-2405191.pdf
NEW QUESTION 95
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. 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. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.
- D. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.
- E. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
- F. Setting DBWR_IO_SLAVES to a non zero value can improve backup performance when using asynchronous I/O/
- G. If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
Answer: C,E,G
Explanation:
Reference:
https://web.stanford.edu/dept/itss/docs/oracle/10gR2/backup.102/b14191/rcmtunin003.htm
NEW QUESTION 96
Examine these queries and their output:
After a system crash, an instance restart and an attempted opening of the PDBs result in:
Which two are true? (Choose two.)
- A. Data file 24 can be recovered while PDB2 is opened.
- B. Data file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.
- C. Data file 24 must be recovered while PDB2 is closed.
- D. Data file 24 must be recovered while the CDB is opened.
- E. Data file 24 cannot be recovered while the CDB is opened.
Answer: D,E
NEW QUESTION 97
Which two are true about duplicating pluggable databases (PDBs) with RMAN?
- A. cdb$root and pdbSseed are automatically duplicated.
- B. All tablespaces belonging to a PDB must be duplicated when duplicating the PDB.
- C. The auxiliary Instance is automatically created with enable_pluggable_database = true.
- D. Two or more PDBs can be duplicated with the same rmak duplicate command.
- E. A user with sysdba or sysbkup must be logged in with RMAN to the PDB to duplicate it.
Answer: B,D
NEW QUESTION 98
Which two are true about instance recovery?
- A. It is not possible if an archived log is missing.
- B. Setting fast_start_mttr_target to a lower value reduces instance recovery time by causing dirty buffers to be written to disk more frequently, thereby reducing the number of I/Os needed during instance recovery.
- C. It is performed automatically after the database is opened; however, blocks requiring recovery are not available until they are recovered.
- D. It is performed automatically while the database remains in mount state. Then the database is opened.
- E. Setting fast_start_mttr_target to a higher value reduces instance recovery time by causing the log writer to write more frequently, thereby reducing the number of I/Os needed during instance recovery.
- F. It is performed by the Recovery Writer (rvwr) background process.
Answer: A,F
NEW QUESTION 99
Which three are true about performing an Oracle Database install on Linux?
- A. It can be done before installing Grid Infrastructure for a Standalone Server.
- B. The Oracle Preinstallation RPM must be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
- C. The Oracle PreinstallationRPMcan be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
- D. It can be done after installing Grid Infrastructure for a Standalone Server.
- E. It allows you to select the languages supported by the Oracle database server.
- F. The runfixup.sh script can install missing RPMs.
- G. The Oracle database administrator must be granted access to the root operating system account to run root privileged scripts.
Answer: A,B,E
NEW QUESTION 100
Which two are true about Oracle Database Configuration Assistant (DBCA)? (Choose two.)
- A. It can be launched from both the command line and the Universal Installer (OUI) interfaces.
- B. It can be used to create container databases and non-container databases.
- C. It can only be launched from the command line interface.
- D. It can be used to convert a non-container database to a container database.
- E. It can be used to change the character set of an existing database.
Answer: C,E
NEW QUESTION 101
Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed:
Which three are true? (Choose three.)
- A. Application PDBs that are subsequently created in the APP1 application container will be cloned from APP1$SEED.
- B. Application PDBs that are subsequently created in the APP1 application container will be cloned from PDB$SEED.
- C. APP1 can never be unplugged.
- D. An application seed PDB is created for APP1.
- E. An application root PDB is created for APP1.
- F. A default service is created for the application root APP1.
Answer: A,B,D
NEW QUESTION 102
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