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質問 # 128
Examine this configuration:
While CDB1is open,
'/u02/app/oracle/fast_recover_area/cdb1/CDB1/controlfile02.ctl' is
accidentally deleted.
To recover from this critical failure, you execute these commands:
What will be the outcome?
- A. It will create `/u01/app/oralce/oradata/CDB1/controlfile/controlfile02.ctl'.
- B. It will re-create `/u02/app/oracle/fast_recover_area/cdb1/CDB1/controlfile02.ctl'
- C. It will create `/u01/app/oracle/product/12.2.0.1/db_1/dbs/ snapcf_cdb1control02.ctl'.
- D. It will fail because there is no autobackup of the controlfiles.
- E. It will create `$ORACLE_HOME/dbs/cdb1/CDB1/controlfile02.ctl'
正解：B
質問 # 129
Which two are true about flashback features in Oracle Database 19c and later releases?
- A. Flashback logs are monitored and proactively deleted when beyond the retention period defined in db_flashback_retention_target before there is space pressure.
- B. Flashback logs are automatically purged whenever the value
Of DB_FLASHBACK_RETENTION_TARGET is changed. - C. Flashback logs are automatically purged when db_flashback_retention_target is set lower than the time they have already been retained.
- D. 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.
- E. Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_flashback_retention_TARGET only after there is space pressure
正解：A、D
質問 # 130
Which three are true about Recovery Manager (RMAN) in Oracle Database 19c and later releases? (Choose three.)
- A. It isalways possible for RMAN to connect to a pluggable database as a target if any RMAN Catalog is used.
- B. It is only possible for RMAN to connect to a pluggable database as a target if an RMAN Virtual Private Catalog is used.
- C. A Virtual Private Catalog used to register a container database can be created in a non-container database.
- D. A Virtual Private Catalog used to registera container database can be created in a pluggable database.
- E. It is always possible for RMAN to connect to a pluggable database as a target.
- F. A Virtual Private Catalog used to register a container database must be created in a pluggable database.
正解：C、D、E
質問 # 131
Examine this configuration:
28.CDB1is a container database.
29.COMMON_USER_PREFIXis set to an empty string.
30.PDB1is a pluggable database in CDB1.
31.APP1_ROOTis an application container in CDB1.
32.APP1_PDB1is 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$ROOT.
- B. It will return an error because creation of a local role is not allowed in CDB$ROOT.
- C. ROLE1 will be created only in CDB$ROOT and APP1_ROOT.
- D. It will return an error because common roles must start with C##.
- E. ROLE1 will be created in CDB$ROOT, PDB1, APP1_ROOT, and APP1_PDB1.
正解：B
解説：
SQL> create role testrole container=current;
create role testrole container=current
* ERROR at line 1:
ORA-65049: Creation of local user or role is not allowed in this container.
質問 # 132
Examine this configuration:
1. The ORCL database data files are in Automatic Storage Management (Oracle ASM) disk group +DATA.
2. ORCL uses disk group +FRA for 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 ORCL database instance is started.
- B. Only the ORCL database and the ASM instances are started.
- C. The ORCL database, the Oracle ASM instances, the +DATA and +FRA disk groups, and the LISTENER are started.
- D. Only the ORCL database instance, the Oracle ASM instance, and the +DATA and +FRA disk groups are started.
- E. Only the ORCL database instance and the +DATA and +FRA disk groups are started.
正解：D
質問 # 133
Which two are true about Oracle Database Configuration Assistant (DBCA) templates?
- A. Oracle DBCA templates can be used to create new databases and duplicate existing databases.
- B. The Data Warehouse template is most suitable when transaction response time is the key criterion.
- C. Oracle DBCA templates can store only logical structure and not database files.
- D. New templates can only be created by modifying an existing user-created template.
- E. The General Purpose or Transaction Processing templates are most suitable when concurrency and recoverability are key criteria.
正解：B、C
質問 # 134
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 a SYSAUX tablespace data 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 all copies of the control file
- E. after losing an UNDO tablespace that is in use
正解：B、D
質問 # 135
choose two You take your database backups by using the RMAN media management interface (MMI). Which two are true about the use of the RMAN MMI?
- A. You can
- B. You can
- C. You can
- D. You can
- E. You can
正解：A、E
質問 # 136
Which two are true about Oracle instance recovery?
- A. Recovery begins from the last checkpoint position that was calculated by the Database Writer before instance failure.
- B. Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (ckpt).
- C. Recovery reads redo until the end of the redo thread, and then opens the database, smon then rolls back any dead transactions.
- D. Recovery begins from the start of any active redo log group or the start of the current log group if no other group is active.
- E. Recovery begins from the beginning of the current redo log group.
- F. Recovery reads redo until the end of the redo thread, smon rolls back any dead transactions, and then the database is opened.
正解：B、D
質問 # 137
Choose two. Which two are true about Rapid Home Provisioning of Oracle software?
- A. It can be used only for Oracle Grid Infrastructure, including Oracle Restart.
- B. It can be used for applications and middleware.
- C. It can be used for both Oracle Database and Oracle Grid Infrastructure, including Oracle Restart.
- D. It can be used for both Oracle Database and Oracle Grid Infrastructure, excluding Oracle Restart.
- E. It can be used only for Oracle Grid Infrastructure, excluding Oracle Restart.
正解：B、C
質問 # 138
Choose the best answer. On the 10th of August, you implement an incremental database backup strategy and configure a recovery window of five days. Level 0 backups are taken on the 10th, 17th, and 24th of August. Differential level 1 incremental backups are taken daily between the level 0 backups. Today is the 26th of August. Which backups will be obsolete?
- A. all backups prior to 24th of August
- B. all backups prior to 20th of August
- C. all backups prior to 10th of August
- D. all backups prior to 22nd of August
- E. all backups prior to 17th of August
正解：E
質問 # 139
RMAN has just been connected to a target database and the recovery catalog database.
In which two cases would an automatic partial resynchronization occur between this target database's control file and the RMAN recovery catalog?
- A. When any control file metadata for data file backups or image copies is now older than CONTROL_FILE_RECORD_KEEP_TIME.
- B. When a backup of the current SPFILE is created.
- C. When the target is first registered.
- D. When a new data file is added to a tablespace in a registered target database.
- E. When any control file metadata for archive log backups or image copies is now older than CONTROL_FILE_RECORD_KEEP_TIME.
正解：C、D
解説：
In a full resynchronization, RMAN updates all changed records, including those for the database schema. RMAN performs a full resynchronization after structural changes to database (adding or dropping database files, creating new incarnation, and so on) or after changes to the RMAN persistent configuration.
When a database is registered with a recovery catalog for the first time a full catalog synchronization is performed
https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/managing-recovery- catalog.html#GUID-6B077FE7-8E10-4603-8FDB-CAE3357E85C9
質問 # 140
1.Which two are prerequisites for creating a backup-based duplicate database?
- A. matching the database identifier (DBID) of the source database and the duplicate database
- B. creating an SPFILE for the target database
- C. creating a password file for an auxiliary instance
- D. connecting to an auxiliary instance
- E. connecting to the target database and a recovery catalog to execute the duplicate command
正解：C、D
質問 # 141
In a single-instance, multitenant container database (CDB), which three are only ever defined in or part of CDB$ROOT?
- A. redo logs
- B. undo tablespaces
- C. all data dictionary metadata
- D. temporary tablespaces
- E. user-defined PL/SQL packages
- F. mandatory Oracle-supplied PL/SQL packages
- G. control files
正解：A、C、G
質問 # 142
Examine these queries and their output:
After a system crash, an instance restart and an attempted opening of the PDBs result in:
Which two are true? (Choose two.)
- A. Data file 24 cannot be recovered while the CDB is opened.
- B. Data file 24 can be recovered while PDB2 is opened.
- C. Data file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.
- D. Data file 24 must be recovered while PDB2 is closed.
19c: PDB SYSTEM or UNDO Tablespace Recovery: The CDB and all other PDBs can be left opened. 1. Connect to PDB 2. Shutdown abort the PDB, if its not automatically done. sqlplus sys@sales_pdb as sysdba sql> SHUTDOWN ABORT; OR ALTER PLUGGABLE DATABASE CLOSE ABORT; rman target sys@slaes_pdb rman> restore database; rman> recover database; rman> alter pluggable database sales_pdb open; - E. Data file 24 must be recovered while the CDB is opened.
正解：B、E
質問 # 143
Which two are true about duplicating pluggable databases (PDBs) with RMAN?
- A. A user with sysdba or sysbkup must be logged in with RMAN to the PDB to duplicate it.
- B. All tablespaces belonging to a PDB must be duplicated when duplicating the PDB.
- C. Two or more PDBs can be duplicated with the same rmak duplicate command.
- D. cdb$root and pdbSseed are automatically duplicated.
- E. The auxiliary Instance is automatically created with enable_pluggable_database = true.
正解：B、C
質問 # 144
Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)
- A. The number of table rows is considered when evaluating the cost of accessing a table using an index.
- B. Index balanced B*Tree height is considered when evaluating the cost of using an index.
- C. The Statistics Advisor generates actions for all recommendations.
- D. The Statistics Advisor can help recommend the best way to gather statistics.
- E. Statistics collected using DBMS_STATS always yield the best optimizer result.
正解：D、E
質問 # 145
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