Oracle Oracle Certifications 1Z0-083 Questions & Answers

• Question 31:

  Which three are true about SGA memory management in a multitenant database? (Choose three.)

  A. Setting DB_CACHE_SIZE for a PDB guarantees a minimum amount of Database Buffer Cache memory for that PDB.

  B. The SHARED_POOL_SIZE setting for a PDB can be up to 80% of the SHARED_POOL_SIZE setting of the root container.

  C. Setting SHARED_POOL_SIZE for a PDB guarantees a minimum amount of Shared Pool memory for that PDB.

  D. The SGA_TARGET setting for a PDB cannot exceed 50% of the SGA_TARGET value of the root container.

  E. Setting SGA_TARGET for a PDB guarantees a minimum amount of SGA memory for that PDB.

  F. SGA_MIN_SIZE cannot be set for a PDB.

  Correct Answer: ACE

• Question 32:

  Examine this configuration:

  1.

  CDB1 is an Oracle Database 12c Release 2 container database (CDB).

  2.

  PDB1 and PDB2 are two pluggable databases (PDBs) in CDB1.

  After successfully performing all the preupgrade tasks, you execute these commands from the Oracle Database 18c environment:

  

  What is the outcome?

  A. It fails because PDB$SEED is in MIGRATE state.

  B. Only CDB$ROOT, PDB$SEED, and PDB2 are upgraded.

  C. Only CDB$ROOT, PDB$SEED, and PDB1 are upgraded.

  D. CDB$ROOT, PDB$SEED, PDB1, and PDB2 are upgraded.

  E. Only CDB$ROOT and PDB$SEED are upgraded.

  F. It fails because PDB2 is not in UPGRADE state.

  Correct Answer: C

  C. Only CDB$ROOT, PDB$SEED, and PDB1 are upgraded.

  CDB$ROOT - In Upgrade MOde PDB$SEED - in Upgrade Mode PDB1 - In Upgrade Mode (Alter .. Open Upgrade) PDB2 - Excluded

  A - Incorrect When a PDB is in open migrate mode, you can run database upgrade scripts on the PDB

  F-Incorrect -it's excluded.

• Question 33:

  You want to transport the UNIVERSITY tablespace from one database to another.

  The UNIVERSITY tablespace is currently open read/write.

  The source and destination platforms have the same endian format.

  Examine this list of steps:

  1.

  Make the UNIVERSITY tablespace read-only on the source system.

  2.

  Export the UNIVERSITY tablespace metadata using EXPDP.

  3.

  Create a cross-platform backup set from the UNIVERSITY tablespace on the source system, using an RMAN command that includes the DATAPUMP clause.

  4.

  Copy the cross-platform backup sets to the destination system.

  5.

  Copy the Data Pump dump set from the source to the destination system.

  6.

  Restore the cross-platform backup set on the destination system using an RMAN command that includes the DATAPUMP clause.

  7.

  Import the UNIVERSITY tablespace metadata using IMPDP.

  8.

  Make the UNIVERSITY tablespace read/write on the destination system.

  Which are the minimum number of steps required, in the correct order, to transport the UNIVERSITY tablespace?

  A. 1, 3, 4, 6, 8

  B. 3, 4, 6

  C. 1, 2, 3, 4, 5, 6, 7, 8

  D. 2, 3, 4, 5, 6, 7

  Correct Answer: A

  https://docs.oracle.com/en-us/iaas/Content/Database/Tasks/mig-rman-cross-plat-transp-tablespace.htm

• Question 34:

  Which three actions will add a resource to an Oracle Restart configuration? (Choose three.)

  A. creating an Oracle Database service by modifying the SERVICE_NAMES parameter

  B. creating a disk group using the CREATE DISKGROUP SQL statement

  C. creating a database using the CREATE DATABASE SQL statement

  D. creating a database service using DBMS_SERVICE.CREATE_SERVICE

  E. creating a database service using Oracle Database Configuration Assistant (DBCA)

  F. creating an Oracle Automatic Storage Management (ASM) instance with ASM Configuration Assistant (ASMCA)

  Correct Answer: BEF

  Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/admin/configuring-automatic-restart-of-an-oracle-database.html#GUID-2AED50FD-C9C4-4187-8BD8-5113B6735A4A

• Question 35:

  You plan to perform cross-platform PDB transport using XTTS. Which two are true? (Choose two.)

  A. A backup of the PDB must exist, taken using the BACKUP command with the TO PLATFORM clause.

  B. The source PDB must be in MOUNT state.

  C. The source PDB must not be an application root.

  D. The source PDB can be in MOUNT or OPEN state.

  E. The source and target platforms must have the same endianness.

  F. Automatic conversion of endianness occurs.

  Correct Answer: BE

  Reference: https://blog.enmotech.com/2018/01/10/oracle-12cr2-cross-platform-pdb-transport-using-xtts/

• Question 36:

  Which three true about recovering tables using RMAN? (Choose three.)

  A. RMAN can recover tables in the SYSAUX tablespace.

  B. RMAN can recover tables owned by the SYS user.

  C. RMAN can recover tables in the SYSTEM tablespace.

  D. RMAN always uses an auxiliary instance.

  E. RMAN can recover tables in a standby database.

  F. RMAN can recover a table after a DDL operation has altered the table structure.

  G. RMAN can recover tables owed by the SYSTEM user.

  Correct Answer: DFG

  A. RMAN can recover tables in the SYSAUX tablespace. - WRONG

  B. RMAN can recover tables owned by the SYS user. - WRONG

  C. RMAN can recover tables in the SYSTEM tablespace.- WRONG

  D. RMAN always uses an auxiliary instance.

  E. RMAN can recover tables in a standby database.- WRONG

  F. RMAN can recover a table after a DDL operation has altered the table structure.

  G. RMAN can recover tables owed by the SYSTEM user.

  22.1.4 Backup Guide

• Question 37:

  Which operating system group is NOT needed to perform an Oracle Database installation?

  A. OSASM

  B. OSKMDBA

  C. OSDBA

  D. OSOPER

  E. OSRACDBA

  Correct Answer: A

  Reference: https://docs.oracle.com/database/121/LADBI/usr_grps.htm#LADBI2820

• Question 38:

  Which three are true about the Oracle Optimizer? (Choose three.)

  A. It obeys all hints.

  B. It considers the filters in WHERE clauses when generating execution plans for SQL statements.

  C. It can re-optimize execution plans after previous executions detect suboptimal plans.

  D. It considers object statistics when generating execution plans for SQL statements.

  E. It updates stale object statistics in the Data Dictionary.

  F. It can only use SQL Plan Directives tied to the SQL statement for which a plan is being generated.

  Correct Answer: BCD

• Question 39:

  RMAN has just been connected to a target database and the recovery catalog database.

  In which two cases would an automatic full resynchronization occur between this target database's control file and the RMAN recovery catalog? (Choose two.)

  A. when control file metadata for archive log backups or image copies has been overwritten in the target database's control file due to being older than CONTROL_FILE_RECORD_KEEP_TIME

  B. when control file metadata for data file backups or image copies has been overwritten in the target database's control file due to being older than CONTROL_FILE_RECORD_KEEP_TIME

  C. when a new tablespace is added to a registered target database

  D. when a backup of the current control file is created

  E. when the target is first registered

  Correct Answer: CE

  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 https://www.oracledistilled.com/oracle-database/backup-and-recovery/registering-a-database-with-a-recovery-catalog/#:~:text=Using%20RMAN%2C%20connect%20to%20both,register)%20and%20the%20recovery%20catalog.andtext=Next% 20issue%20the%20REGISTER%20DATABASE%20command%20to%20register%20the%20database.andtext=When%20a%20database%20is%20registered,is%20performed%20(%20RESYNC%20CATALOG%20).

• Question 40:

  Which two are true about RMAN Multisection backups when a very large data file is divided into four sections? (Choose two.)

  A. Each of the file sections must be processed serially.

  B. The four sections can be created serially.

  C. The four sections must be image copies.

  D. The four sections can be created in parallel.

  E. The four sections must be contained in backup sets.

  Correct Answer: BD

  If you specify the SECTION SIZE parameter on the BACKUP command, then RMAN creates a backup set in which each backup piece contains the blocks from one file section. The option E mentions backup "sets" (more than one backup set), making the option wrong.

  Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/bradv/backing-up-database-advanced.html#GUID-F2D9FF2D-9E1C-4D38-AD8E-88B6B32F02B4