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質問 # 14
Which two are true about data movement between a non-CDB and a PDB using Data Pump? (Choose two.)
- A. Moving data from a non-CDB to a PDB is only possible by using conventional export and import.
- B. Moving data from a PDB to a non-CDB is only possible by using transportable tablespace export and import.
- C. Oracle attempts to convert conventional database users to local users when moving schemas from a non- CDB to a PDB.
- D. A new PDB is automatically created when importing a non-CDB into a CDB.
- E. Tablespaces are automatically created as neeed while importing full exports in either a non-CDB or a PDB.
- F. Oracle attempts to convert common users to conventional users when moving schemas from a PDB to a non-CDB.
正解：C、F
質問 # 15
Choose two. Which two are true about RMAN Multisection backups when a very large data file is divided into four sections?
- A. The four sections can be created in parallel.
- B. The four sections can be created serially.
- C. The four sections must be image copies.
- D. Each of the file sections must be processed serially.
- E. The four sections must be contained in backup sets.
正解：A、E
質問 # 16
Which three actions are performed by the Oracle Preinstallation RPM, oracle-database-server-xxxx- preinstall, for Oracle Grid Infrastructure, where xxxx is the Oracle version and release? (Choose three.)
- A. configuring the OS for Oracle Automatic Storage Management shared storage access
- B. creating the grid OS user
- C. creating thte oraInventory (oinstall) group
- D. creating the OSDBA (dba) group
- E. creating the oracle OS user
- F. performing checks to ensure minimum configuration requirements for Oracle Grid Infrastructure are met
正解：C、D、E
質問 # 17
You have configured RMAN SBT channels to write backups to media.
You then take an RMAN backup by using this command:
Which three are true? (Choose three.)
- A. All archive logs created after this backup are kept for two years.
- B. The data file backups in the self-contained archive backup are not considered obsolete for two years regardless of the retention policy.
- C. The restore point is a label for the system change number (SCN) that will be saved two years after the archival backup was taken.
- D. The SPFILE is included in the self-contaied archival backup.
- E. The control file is included in the self-contained archival backup.
- F. The restore point is a label for the system change number (SCN) before the archival backup was taken.
正解：B、D、E
解説：
Explanation
https://docs.oracle.com/cd/E18283_01/server.112/e17118/statements_6011.htm
http://devel.hotpilot.cz/ora11gR2u2-full/backup.112/e10643/rcmsubcl011.htm An example:
http://www.online-database.eu/recovery-manager-rman/143-rman-backupsets-with-restore-point
質問 # 18
Which two are true about the automatic execution of operating system scripts when performing silent mode installation starting from Oracle Database 19c? (Choose two.)
- A. The response file can specify the root or sudo password.
- B. The response file can specify the path of the sudo program.
- C. The installer will prompt for the root or sudo password.
- D. Silent install always runs operating scripts automatically.
- E. The response file must contain the root or sudo password.
正解：B、C
解説：
response file options:
oracle.install.db.rootconfig.executeRootScript= true / false
oracle.install.db.rootconfig.configMethod= ROOT / SUDO
oracle.install.db.rootconfig.sudoPath=
oracle.install.db.rootconfig.sudoUserName=
https://oraclefact.wordpress.com/2019/08/05/1-install-oracle-database-19c-with-automatic-root- scripts-execution/
質問 # 19
How do you configure a CDB for local undo mode?
- A. Open the CDB instance in restricted mode. In cdb$root, execute alter database local undo on. create an undo tablespace in each PDB, and then restart the CDB instance
- B. Open the CDB instance in restricted mode. In cdb$root, drop the undo tablespace. Execute alter database local undo on in each PDB, and then restart the CDB instance.
- C. Open the CDB in read-only mode. In cdb$root, execute alter database local undo on, and then change the CDB to read/write mode.
- D. Open the CDB instance in upgrade mode. In cdb$root, execute alter database local undo on, and then restart the CDB instance.
- E. Open the CDB instance in upgrade mode. In each PDB, execute alter database local undo on, create an undo tablespace, and then restart the CDB instance.
正解：B
質問 # 20
Which three are true about performing an Oracle Database install on Linux? (Choose three.)
- A. It can be done after installing Grid Infrastructure for a Standalone Server.
- B. It allows you to select the languages supported by the Oracle database server.
- C. The Oracle Preinstallation RPM can be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
- D. It can be done before installing Grid Infrastructure for a Standalone Server.
- E. The runfixup.sh script can install missing RPMs.
- F. The Oracle Preinstallation RPM must be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
- G. The Oracle database administrator must be granted access to the root operating system account to tun root privileged scripts.
正解：A、C、D
解説：
You can install grid and the the oracle software, otherwise you can also install oracle software before the gird and then register database with oracle restart.
質問 # 21
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. If an RMAN BACKUP VALIDATE command takes noticeably less time than an actual backup, then write I/O is a likely bottleneck.
- B. If an RMAN BACKUP VALIDATE command takesroughly the same time as an actual backup, then read I/O is a likely bottleneck.F
- C. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
- D. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
- 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、C、D
質問 # 22
Which two are true about instance recovery?
- A. It is performed automatically while the database remains in mount state. Then the database is opened.
- B. 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.
- C. It is not possible if an archived log is missing.
- D. It is performed automatically after the database is opened; however, blocks requiring recovery are not available until they are recovered.
- E. It is performed by the Recovery Writer (rvwr) background process.
- F. 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.
正解：C、F
質問 # 23
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. Setting DBWR_IO_SLAVESto a non zero value can improve backup performance when using asynchronous I/O/
- B. If an RMAN BACKUP VALIDATEcommand takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
- C. If an RMAN BACKUP VALIDATEcommand takes roughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.
- D. If an RMAN BACKUP VALIDATEcommand 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$BACKUP_ASYNC_IO.SHORT_WAITSare a potential performance bottleneck when asynchronous I/O is used.
- F. Setting DBWR_IO_SLAVESto a non zero value can improve backup performance when using synchronous I/O.
- G. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECONDare a potential performance bottleneck when synchronous I/O is used.
正解：B、D、F
解説：
http://docshare04.docshare.tips/files/21043/210437276.pdf
質問 # 24
Which three are true about thresholds, metrics, and server-generated alerts? (Choose three.)
- A. STATISTICS_LEVEL must be set to ALL to generate alerts.
- B. All metrics are instance related.
- C. Metrics are statistical counts for a specific unit.
- D. A space usage management alert is automatically cleared after the underlying problem is resolved.
- E. They are generated by SMON when a tablespace is 97% full.
- F. Cleared stateful alerts are displayed by querying DBA_ALERT_HISTORY.
正解：C、D、F
解説：
A - False. Tablespace Space Usage metris is database related
B - True. Stateful alerts appear in DBA_OUTSTANDING_ALERTS and, when cleared, go to DBA_ALERT_HISTORY C - True. Most alerts (such as "Out of space") are clared automatically when the cause of the problem disappears.
D - False. They're generated by MMON
E - True
F - False. This parameter is not required to generate alerts
質問 # 25
Choose three. Which three are true about the Oracle Optimizer?
- A. It obeys all hints.
- B. It considers object statistics when generating execution plans for SQL statements.
- C. It updates stale object statistics in the Data Dictionary.
- D. It considers the filters in WHERE clauses when generating execution plans for SQL statements.
- E. It can re-optimize execution plans after previous executions detect suboptimal plans.
- F. It can only use SQL Plan Directives tied to the SQL statement for which a plan is being generated.
正解：C、D、E
質問 # 26
Examine this configuration:
1. CDB1 is a container database.
2. COMMON_USER_PREFIX is set to an empty string.
3. PDB1 is a pluggable database in CDB1.
4. APP1_ROOT is an application container in CDB1.
5. APP1_PDB1 is an application PDB in APP1_ROOT.
You execute these commands:
$ sqlplus sys/oracle@localhost:1521/cdb1 as sysdba
SQL> CREATE ROLE role1 CONTAINER=CURRENT;
What is true?
- A. ROLE1 will be created only in CDB$ROOT and APP1_ROOT.
- B. ROLE1 will be created only in CDB$ROOT.
- C. It will return an error because creation of a local role is not allowed in CDB$ROOT.
- D. ROLE1 will be created in CDB$ROOT, PDB1, APP1_ROOT, and APP1_PDB1.
- E. It will return an error because common roles must start with C##.
正解：B
質問 # 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, 8, 6, 10
- C. 1, 2, 5, 7, 4, 10
- D. 1, 3, 5, 6, 10
- E. 1, 3, 5, 6, 10
- F. 1, 3, 5, 6, 9
正解：E
質問 # 28
Choose two. Which two are true about monitoring waits for sessions and services?
- A. V$SESSION_WAIT_CLASS displays waits broken down by wait class only for terminated sessions.
- B. V$SESSION_EVENT displays all waits events for those events that have occurred at least once for sessions that have now terminated.
- C. V$SERVICE_EVENT displays wait counts for every wait event for each service even including counts of zero for waits that never occurred.
- D. V$SESSION_WAIT and V$SESSION both contain details of the event on which a waiting session is currently waiting.
- E. V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.
正解：C、D
質問 # 29
You plan to install Oracle Grid Infrastructure for a Standalone Server and Oracle Database for the first time on a server.
Examine this command and its outcome:
Which two are true? (Choose two.)
- A. oracle will be granted the SYSASM privilege when installing the Oracle Database software.
- B. oracle can own an Oracle Database installation but not an Oracle Grid Infrastructure installation.
- C. The user account, oracle, and group, oinstall, can be used for all Oracle software installations.
- D. oracle will be an owner of the Oracle Inventory.
- E. oracle must be the owner of every Oracle Database installation.
正解：C、D
質問 # 30
choose two Which two are true about RMAN image copies?
- A. They can only be written to disk.
- B. They are the only backup option available for databases in NOARCHIVELOG mode.
- C. They can be used as a level 1 incremental backup.
- D. They can be used as a level 0 incremental backup.
- E. They can be encrypted using Transparent Data Encryption (TDE).
正解：A、D
質問 # 31
Choose three. Which three are true about using an RMAN Recovery Catalog with a pluggable database (PDB) target connection in Oracle Database 19c and later releases?
- A. The target PDB must be registered in a base catalog.
- B. The base catalog must be used by RMAN when performing point-in-time recovery for the PDB registered in the Virtual Private Catalog.
- C. The target PDB must be registered in both the base catalog and the Virtual Private Catalog.
- D. The target PDB must be registered in a Virtual Private Catalog.
- E. The base catalog owner must give the Virtual Private Catalog access to metadata for one or more PDBs.
- F. The base catalog must be enabled for Virtual Private Catalog use.
正解：B、E、F
質問 # 32
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