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Oracle 1Z1-083 is a certification exam specifically designed for professionals who have a keen interest in database administration. 1Z0-083 exam is aimed at testing the skills and knowledge required for the successful administration of an Oracle Database. Oracle Database Administration II certification is a globally recognized credential that establishes the holder's proficiency in Oracle Database Administration II.
Oracle Database Administration II Exam covers a wide range of topics related to Oracle database administration, including database backup and recovery, database security, database performance tuning, and managing Oracle Grid Infrastructure. Candidates are expected to have a deep understanding of the Oracle database architecture, as well as hands-on experience in managing and maintaining Oracle databases. 1Z0-083 exam consists of 85 multiple-choice questions and must be completed within 2.5 hours.
NEW QUESTION # 94
Which two are true about RMAN Multisection backups when a very large data file is divided into four sections?
(Choose two.)
- A. The four sections must be image copies.
- B. The four sections can be created serially.
- C. The four sections must be contained in backup sets.
- D. Each of the file sections must be processed serially.
- E. The four sections can be created in parallel.
Answer: C,E
NEW QUESTION # 95
Which three are true about Optimizer Statistics Advisor? (Choose three.)
- A. It always analyzes all schemas in the database.
- B. It runs automatically every night by default.
- C. It is part of the DBMS_STATS package.
- D. It is part of the DBMS_ADVISOR package.
- E. It can be run only manually.
- F. It can recommend changes to improve the statistics gathering process.
Answer: B,C,F
Explanation:
Explanation
https://mikedietrichde.com/2017/08/22/oracle-optimizer-statistics-advisor-in-oracle-database-12-2-0-1/
https://www.oracle.com/technetwork/database/bi-datawarehousing/twp-bp-for-stats-gather-19c-5324205.pdf
NEW QUESTION # 96
Which two are true about the Automatic Database Diasnostic Monitor (ADDM)? (Choose two.)
- A. It runs automatically after each AWR snapshot.
- B. A DBA can run it manually.
- C. It analyzes a period of time corresponding to the 12 hours of activity.
- D. It analyzes a period of time corresponding to the last day of activity.
- E. Results are written to the alert log.
Answer: A,B
NEW QUESTION # 97
For which two requirements can you use the USER_TABLESPACE clause with the CREATE PLUGGABLE DATABASE command? (Choose two.)
- A. to specify a default tablespace in a PDB cloned from another PDB in the same CDB
- B. to specify the list of tablespaces to include when creating a PDB from the CDB seed
- C. to exclude a temp tablespace when plugging in a PDB
- D. to exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB
- E. to include specific user tablespaces only when relocating a PDB
- F. to specify the list of user tablespaces to include when moving a non-CDB to a PDB
Answer: D,F
NEW QUESTION # 98
choose four Which four are true about performance-related Oracle tools?
- A. Database Replay always uses one replay client for each original database session.
- B. Database Replay always uses one replay client for all the original database sessions.
- C. The Automatic Database Diagnostic Monitor (ADDM) Compare Period report can compare two non-consecutive periods.
- D. SQL Performance Analyzer can suggest schema changes.
- E. SQL Performance Analyzer can identify regressed SQL statements.
- F. The Automatic Database Diagnostic Monitor (ADDM) Compare Period report can compare two consecutive periods.
- G. The Active Session History (ASH) report is based on wait event samples.
Answer: C,D,E,F
NEW QUESTION # 99
Which two statements are true about recovering logically corrupted tables or table partitions from an RMAN backup?
- A. Tables or table partitions can be recovered only when the database is in mount state.
- B. Tables or table partitions can be recovered by using an auxiliary instance only.
- C. Tables or table partitions from the system and sysaux tablespaces cannot be recovered.
- D. Tables with not null constraints cannot be recovered.
- E. Tables or table partitions with a foreign key cannot be recovered.
Answer: B,C
NEW QUESTION # 100
Choose one You want to create a test database as a replica of your production database with minimum intervention from a DBA. Which method would you use?
- A. Create the database by using the CREATE DATABASE . . . command and manually import data by using Data Pump.
- B. Use DBCA to create a template from the existing database to contain the database structure and then manually copy the data by using Oracle Data Pump.
- C. Use DBCA to create a template from the existing database to contain the database structure with data files and then use the same template to create the database in the new location.
- D. Use Database Configuration Assistant (DBCA) to create a template from the existing database to contain the database structure.
Answer: C
NEW QUESTION # 101
A container database (CDB) contains two pluggable databases PDB1 and PDB2.
The LOCAL_UNDO_ENABLED database property is set to FALSE in the CDB. Data file 24 of PDB2 was deleted and you need to restore and recover it.
The only RMAN backup that exists was created with the BACKUP DATABASE command while connected to CDB$ROOT.
Which three are true? (Choose three.)
- A. Data file 24 can be recovered while connected to PDB2.
- B. Data file 24 can be restored only while connected to PDB2.
- C. Data file 24 can be restored and recovered while connected to CDB$ROOT.
- D. Data file 24 can be recovered only while connected to PDB2.
- E. Data file 24 can be restored only while connected to CDB$ROOT.
- F. Data file 24 can be recovered while connected to CDB$ROOT.
Answer: B,C,F
NEW QUESTION # 102
Choose the best answer. 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. 1,2, 5, 7,4, 10
- B. 1,3, 5, 7, 10
- C. 1,3, 5, 6, 10
- D. 1,3,5,8, 6, 10
- E. 1,3,5, 6, 10
- F. 1,3,5, 6, 9
Answer: B
NEW QUESTION # 103
Choose two. You plan to perform cross-platform PDB transport using XTTS. Which two are true?
- A. The source PDB must be in MOUNT state.
- B. Automatic conversion of endianess occurs.
- C. The source PDB can be in MOUNT or OPEN state.
- D. The source PDB must not be an application root.
- E. A backup of the PDB must exist, taken using the BACKUP command with the To PLATFORM clause.
- F. The source and target platforms must have the same endianess.
Answer: C,F
NEW QUESTION # 104
Which two are true about Oracle Database Configuration Assistant (DBCA)? (Choose two.)
- A. It can be used to create container databases and non-container databases.
- B. It can be launched from both the command line and the Universal Installer (OUI) interfaces.
- C. It can be used to convert a non-container database to a container database.
- D. It can be used to change the character set of an existing database.
- E. It can only be launched from the command line interface.
Answer: A,B
Explanation:
An interesting aside is that Oracle have specified that, in the future, non-CDBs will not be possible. But, this option is still available in 19c - which is what this exam is based upon. From Oracle 20c onwards, it is not meant to be possible to create non-CDBs with the DBCA. (not tested, only going from documentation)
NEW QUESTION # 105
Which three are true about RMAN persistent configuration settings, administration, and their effects? (Choose three.)
- A. A target database's persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.
- B. A DBA must specify either a redundancy retention policy or a recovery window retention policy.
- C. Backups written to the fast recovery area (FRA) that are oboslete based on the redundancy retention policy can be deleted automatically to free space.
- D. A target database's persistent RMAN configuration settings are always stored in the target's control file
- E. The V$RMAN_CONFIGURATION view displays only settings with values that have been modified.
- F. The RMAN SHOW ALL command displays only settings with nondefault values.
- G. Backup older than the recovery window retention policy are always deleted automatically if the backup location has insufficient space.
Answer: D,E,G
Explanation:
Reference:
https://books.google.com.pk/books? id=pUEkAAAAQBAJ&pg=PA114&lpg=PA114&dq=V$RMAN_CONFIGURATION+view+displays+only+settings
+with+values+that+have+been+modified&source=bl&ots=fhC9A7ULeX&sig=ACfU3U2- cGhTjmAOpCZhvlL5R4j6ixLRAw&hl=en&sa=X&ved=2ahUKEwjJzf- WmtnoAhXT8eAKHQ9uBG8Q6AEwAHoECAwQJg#v=onepage&q=V%24RMAN_CONFIGURATION%20view
%20displays%20only%20settings%20with%20values%20that%20have%20been%20modified&f=false
NEW QUESTION # 106
Which four are true about RMAN backup sets? (Choose four.)
- A. Blocks from multiple data files can be contained in one backup piece,
- B. A data file can be split into multiple sections stored in different backup sets.
- C. A data file can be split into multiple sections stored in different backup pieces in the same backup set.
- D. A backup set can contain only one backup piece.
- E. Blocks from multiple data files can be contained in one backup set,.
- F. A backup piece can belong to only one backup set.
- G. A backup set must be written to disk.
- H. A backup set must be written to media.
Answer: A,C,E,F
NEW QUESTION # 107
Which two are true about automatic block repair? (Choose two.)
- A. Real-Time Query must be enabled on a physical standby database for automatic block repair to be done on its primary database.
- B. Automatic block repair can repair blocks with no standby database if DB_BLOCK_CHECKING = TRUE.
- C. Real-Time Query must be enabled on a physical standby database for automatic block repair to be done on that physical standby database.
- D. It is not possible for media corrupt blocks.
- E. Real-Time Query must be enabled on a primary database for automatic block repair to be done on any of its physical standby databases.
Answer: A,C
Explanation:
You can use an Oracle Active Data Guard standby database for automatic repair of data corruptions detected by the primary database. Additionally if the corruption is discovered on an Active Data Guard physical standby database the corruption will be automatically repaired with a good block from the Primary.
NEW QUESTION # 108
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_SLAVES to a non zero value can improve backup performance when using synchronous I/O.
- B. Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.
- C. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.
- D. If an RMAN BACKUP VALIDATE command takes noticeably less than an actual backup, then write I/O is a likely bottleneck.
- E. Setting DBWR_IO_SLAVESto a non zero value can improve backup performance when using asynchronous I/O/
- F. If an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.
- G. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.
Answer: A,B,D
NEW QUESTION # 109
While backing up to an SBT channel, you determine that the read phase of your compressed Recovery Manager (RMAN) incremental level 0 backup is a bottleneck. FORCE LOGGING is enabled for the database. Which two could improve read performance? (Choose two.)
- A. Disable FORCE LOGGING for the database.
- B. Increase the level of RMAN multiplexing.
- C. Increase the size of the database buffer cache.
- D. Increase the size of tape I/O buffers.
- E. Enable asynchronous disk I/O.
Answer: A,C
NEW QUESTION # 110
Choose the best answer. Examine this configuration: 1. CDB1 is a container database. 2. DEFAULT_SHARING is METADATA.
3. APP_ROOT is an application root contained in CDB1. 4. APP_PDB1 is an application PDB contained in APP_ROOT. 5. COMPANYAPP is an application contained in APP_ROOT. 6. EMP is a common table created in APP_ROOT and all its application PDBs, created when version 1.0 of COMPANYAPP was installed. You execute these commands: $ sqlplus sys/ orac1e@localhost:1521/cdb1 as sysdba SQL> ALTER SYSTEM SET DEFAULT_SHARING=DATA; System altered. SQL> ALTER SESSION SET CONTAINER=app_root; Session altered. SQL> ALTER PLUGGABLE DATABASE APPLICATION companyapp BEGIN UPGRADE '1.0' TO '2.0'; pluggable database altered. SQL> ALTER TABLE emp ADD (sal NUMBER NOT NULL) ; Table altered. SQL> ALTER PLUGGABLE DATABASE APPLICATION companyapp END UPGRADE TO '2.0'; Pluggable database altered. SQL> ALTER SESSION SET CONTAINER=app_pdb1; Session altered. SQL> DESC emp; Name Null? Type --------------------------------------------------------------ENO NUMBER ENAME VARCHAR2 (20) SQL> SELECT * FROM emp; ENO ENAME ---------------------------------100 Alan 200 Ben SQL> ALTER PLUGGABLE DATABASE APPLICATION companyapp SYNC; What will be the outcome and why?
- A. SAL will be added to APP_PDB1.EMP, with NULLs in columns of existing rows.
- B. It will return an error because EMP is not empty in APP_ROOT.
- C. SAL will be added to APP_PDB1.EMP, with 0 in columns of existing rows.
- D. It will return an error because the SYNC operation is not allowed when constraints are added to common objects.
- E. It will return an error because EMP.SAL is empty in APP_ROOT.
Answer: B
NEW QUESTION # 111
Choose two. Which two are true about RMAN backups when using a media manager?
- A. A media manager always writes RMAN requested backups to tape.
- B. A media manager is required to create RMAN image copies.
- C. A media manager is required to create RMAN proxy copies.
- D. By default, a request for a proxy copy may result in a backup set being created.
- E. The media manager layer (MML) routines provided by Oracle support any vendors' media management products.
Answer: A,D
NEW QUESTION # 112
Choose two. Which two are true about backup encryption?
- A. Backup encryption can be enabled selectively for specific tablespaces.
- B. Keystore-based encryption is the default mode for RMAN backup encryption.
- C. The Transparent Data Encryption (TDE) keystore is backed up using RMAN.
- D. Image copies can be encrypted.
- E. The BACKUP BACKUPSET command can encrypt and decrypt backup sets.
- F. Vendor-specific media management software can be used for making encrypted RMAN backups to media.
Answer: B,E
NEW QUESTION # 113
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 installation must be owned by the grid user.
- B. By default, members of the OSASM group can access Automatic Storage Management and RDBMS instances.
- C. The same OSDBA group must be used for Automatic Storage Management and the Oracle Database.
- D. The Oracle Grid Infrastructure owner must have OSOPER, OSBACKUPDBA, and OSKMDBA as secondary groups.
- E. The Oracle Grid Infrastructure owner owns Oracle Restart and Oracle Automatic Storage Management binaries.
- F. The primary group for the Oracle Grid Infrastructure and Oracle Database owners must be the Oracle Inventory group.
Answer: C,D
Explanation:
Reference:
https://docs.oracle.com/database/121/CWWIN/usrgrps.htm#CWWIN-GUID-6FD3C6AE-5A99- 4C6D-85D6-868CBA6F5DAE
NEW QUESTION # 114
A container database (CDB) contains two pluggable databases PDB1 and PDB2.
The LOCAL_UNDO_ENABLEDdatabase property is set to FALSEin the CDB.
Data file 24 of PDB2was deleted and you need to restore and recover it.
The only RMAN backup that exists was created with the BACKUP DATABASEcommand while connected to CDB$ROOT.
Which three are true? (Choose three.)
- A. Data file 24 can be recovered while connected to PDB2.
- B. Data file 24 can be restored only while connected to PDB2.
- C. Data file 24 can be restored and recovered while connected to CDB$ROOT.
- D. Data file 24 can be recovered only while connected to PDB2.
- E. Data file 24 can be restored only while connected to CDB$ROOT.
- F. Data file 24 can be recovered while connected to CDB$ROOT.
Answer: B,C,F
NEW QUESTION # 115
Which two statements are true about indexes and their administration in an Oracle database?
- A. An index can be scanned to satisfy a query without the indexed table being accessed.
- B. An index is always created by scanning the key columns from the underlying table.
- C. A non-unique index can be converted to a unique index using a Data Definition Language (DDL) command.
- D. An invisible index is maintained when a Data Manipulation Language (DML) command is per- formed on its underlying table.
- E. A descending index is a type of bitmapped index.
Answer: A,D
NEW QUESTION # 116
Which three are true in Oracle 19c and later releases? (Choose three.)
- A. All the Oracle-supplied accounts are Schema Only accounts.
- B. If the password file location changes, then the new location is used automatically by the Oracle Server.
- C. Schema Only accounts can be granted administrator privileges.
- D. Unified Auditing can be configured to audit only events that are issued directly by an audited user.
- E. Privilege Analysis is included in Oracle Enterprise Edition and no longer requires Database Vault.
- F. Unified Auditing can be configured to audit only events that are issued indirectly by an audited user.
Answer: A,C,E
NEW QUESTION # 117
Your database is in ARCHIVELOG mode and you plan to use Flashback Database.
Which two features or parameters manage space availability in the fast recovery area? (Choose two.)
- A. the backup optimization policy
- B. the archived log deletion policy
- C. the DB_CREATE_ONLINE_LOG_DEST_n parameter setting
- D. the backup retention policy
- E. using guaranteed UNDO retention
- F. the DB_RECOVERY_FILE_DEST parameter setting
Answer: B,D
Explanation:
RMAN automatically manages files in the fast recovery area by deleting obsolete backups and archiving files no longer required for recovery.
https://docs.oracle.com/en/database/oracle/oracle-database/18/ssdbi/about-the-fast-recovery- area-and-the-fast-recovery-area-disk-group.html#GUID-05343E2B-24CF-427E-A068-
9AC2104BEF81
NEW QUESTION # 118
Some archived log backups have been accidentally deleted from storage.
Which two commands should be used to update the status of backups in the recovery catalog to display only the missing backups?
- A. CROSSCHECK BACKUP OF ARCHIVELOG ALL
- B. LIST ARCHIVELOG ALL
- C. REPORT OBSOLETE
- D. RESYNC CATALOG
- E. LIST EXPIRED
- F. LIST ARCHIVELOG
Answer: A,E
NEW QUESTION # 119
......
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