2021 Realistic Actual4Exams 1Z0-083 Dumps PDF - 100% Passing Guarantee
Free Oracle 1Z0-083 Exam Questions & Answer
Exam Topic for Oracle Database Administration II Exam Number: 1Z0-083
The following will be discussed in ORACLE 1Z0-083 exam dumps:
- Restore and Recovery Concepts
- Diagnosing Failures
- Backup and Duplicate
- Creating CDBs and Regular PDBs
- Transporting Data
- Using Flashback Technologies
- Recovery and Flashback
- Duplicating a Database
- Backup Strategies and Terminology
- Manage Application PDBs
- Install Grid Infrastructure and Oracle Database
The benefit in Obtaining the 1Z0-083 Exam Certification
- Oracle Database Administrator provides practical experience to candidates from all the aspects to be a proficient worker in the organization
- Oracle Database Administrator can give you an edge at that time easily when candidates appear for a job interview employers seek to notify something which differentiates the individual to another
- Oracle Database Administrator has more useful and relevant networks that help them in setting career goals for themselves
- Oracle Database Administrator provide opportunities to get a job easily in which they are interested in instead of wasting years and ending without getting any experience
- Oracle Database Administrator networks provide you with the right career direction than non certified usually are unable to get
- Certified Professional will reduce the time he spends on tasks, meaning he can get more done this could help reduce company downtime when repairing faults on a system or fixing hardware problems
- Oracle Database Administrator will be confident and stand different from others as their skills are more trained than non-certified professionals
- Becoming Oracle Database Administrator means one thing you are worth more to the company and therefore more to yourself in the form of an upgraded pay package
- Oracle Database Administrator have the knowledge to use the tools to complete the task efficiently and cost effectively than the other non-certified professionals lack in doing so
- Organization owners invest a lot in their employees when it comes to their training with the goal of making them quicker, more efficient, and more knowledgeable about their role
- Oracle Database Administrator Certification is distinguished among competitors
NEW QUESTION 23
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,B
NEW QUESTION 24
Which two are true about creating RMAN backups for an Oracle container database?
- A. The backup pluggable database command can be used to back up cdb$root.
- B. The backup database plus archivelog command will back up archive logs when RMAN is connected to a PDB.
- C. spfile backups can be created while connected to an application root PDB.
- D. The backup database command will create a pluggable database (PDB) backup when RMAN is connected to a PDB.
- E. Tablespaces from different PDBs with identical names must be backed up by connecting RMAN separately to each PDB to back up the tablespaces.
Answer: B,D
NEW QUESTION 25
Which three are true in Oracle 19c and later releases? (Choose three.)
- A. Tablespaces never remain in read/write mode during transportable tablespace operations.
- B. A transportable data pump import can leave a plugged-in tablespace in read/write mode.
- C. A transportable data pump import can leave a plugged-in tablespace in read-only mode.
- D. An ordinary data pump export of a table with encrypted columns will always encrypt the same columns when imported.
- E. Tablespaces always remain in read/write mode during transportable tablespace operations.
- F. Simultaneous data pump jobs can be limited at the pluggable database (PDB) level.
Answer: B,D,E
NEW QUESTION 26
Which three are true about managing memory components in an Oracle database instance? (Choose three.)
- A. On Line Transaction Processing systems often use less Program Global Area than Decision Support Systems.
- B. Automatically tuned and resized System Global Area components will always revert to their initial sizes after an instance restart.
- C. With Automatic Shared Memory Management, the database instance can increase the Program Global Area size by reducing the System Global Area size.
- D. With Automatic Memory Management, the database instance can increase the System Global Area size by reducing the Program Global Area size.
- E. Automatic Memory Management must be used together with locking the System Global Area into physical memory.
- F. With Automatic Shared Memory Management, the database instance can increase the Large Pool size by reducing the Shared Pool size.
Answer: A,C,F
Explanation:
Explanation/Reference: https://docs.oracle.com/database/121/TGDBA/tune_shared_pool.htm
NEW QUESTION 27
Which three are true about creating container databases (CDBs) and pluggable databases (PDBs) in Oracle
19c and later releases? (Choose three.)
- A. A PDB snapshot can be a full copy of a source PDB.
- B. A snapshot copy PDB can be a full copy of a source PDB.
- C. A snapshot copy PDB does not depend on an existing storage snapshot of the source PDB.
- D. A CDB can be duplicated using the Database Configuration Assistant (DBCA) in silent mode with no configuration required before starting the duplication.
- E. A PDB snapshot can be a sparse copy of a source PDB.
- F. A CDB can be duplicated using Recovery Manager (RMAN) with no configuration required before starting the duplication.
- G. A PDB snapshot depends on an existing storage snapshot of the source PDB.
Answer: B,E,G
NEW QUESTION 28
Which three are true about Database Point-in-Time Recovery?
- A. Database Point-in-Time Recovery is performed by the Managed Recovery Process (MRP)
- B. The database must be open resetlogs after Database Point-in-Time Recovery.
- C. The target point for the recovery must be specified as a time or System Change Number (SCN).
- D. The database must be in mount state when performing Database Point-in-Time Recovery.
- E. The database must have flashback database on to perform Database Point-in-Time Recovery.
- F. The database must be in archivelog mode.
Answer: C,D,E
NEW QUESTION 29
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 owner must have OSOPER, OSBACKUPDBA, and OSKMDBA as secondary groups.
- B. The Oracle Grid Infrastructure owner owns Oracle Restart and Oracle Automatic Storage Management binaries.
- C. The same OSDBA group must be used for Automatic Storage Management and the Oracle Database.
- D. The Oracle Grid Infrastructure installation must be owned by the grid user.
- E. The primary group for the Oracle Grid Infrastructure and Oracle Database owners must be the Oracle Inventory group.
- F. By default, members of the OSASM group can access Automatic Storage Management and RDBMS instances.
Answer: A,C
NEW QUESTION 30
Which two are true about data movement between a non-CDB and a PDB using Data Pump? (Choose two.)
- A. Moving data from a PDB to a non-CDB is only possible by using transportable tablespace export and import.
- B. Tablespaces are automatically created as neeed while importing full exports in either a non-CDB or a PDB.
- C. Oracle attempts to convert common users to conventional users when moving schemas from a PDB to a non-CDB.
- D. Oracle attempts to convert conventional database users to local users when moving schemas from a non- CDB to a PDB.
- E. Moving data from a non-CDB to a PDB is only possible by using conventional export and import.
- F. A new PDB is automatically created when importing a non-CDB into a CDB.
Answer: C,D
NEW QUESTION 31
Which three are true about managing memory components in an Oracle database instance? (Choose three.)
- A. On Line Transaction Processing systems often use less Program Global Area than Decision Support Systems.
- B. Automatically tuned and resized System Global Area components will always revert to their initial sizes after an instance restart.
- C. With Automatic Shared Memory Management, the database instance can increase the Program Global Area size by reducing the System Global Area size.
- D. With Automatic Memory Management, the database instance can increase the System Global Area size by reducing the Program Global Area size.
- E. Automatic Memory Management must be used together with locking the System Global Area into physical memory.
- F. With Automatic Shared Memory Management, the database instance can increase the Large Pool size by reducing the Shared Pool size.
Answer: A,C,F
NEW QUESTION 32
Which three are true about upgrading Oracle Grid Infrastructure?
- A. Existing Oracle Database instances must be shut down before starting the upgrade.
- B. The upgrade process will automatically install all mandatory patches for the current version of Oracle Grid Infrastructure.
- C. The newer version is installed in a separate Oracle Grid Infrastructure home on the same server as the existing version.
- D. Only the grid user can perform the upgrade.
- E. An existing Oracle base can be used.
- F. A direct upgrade can be performed only from the immediately preceding Oracle Grid Infrastructure version.
Answer: A,B,C
NEW QUESTION 33
Which two are true about Oracle instance recovery? (Choose three.)
- A. Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (CKPT).
- B. Recovery begins from the last checkpoint position that wascalculated by the Database Writer before instance failure.
- C. Recovery begins from the beginning of the CURRENT redo log group.
- 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 reads redo until the end of the redo thread. SMON rollsback any dead transactions, and then the datanase is opened.
- F. Recovery reads redo until the end of the redo thread, and then opens the database. SMON then rolls back any dead transactions.
Answer: B,E,F
NEW QUESTION 34
Which three are true about opatchauto? (Choose three.)
- A. It must be invoked by a user with root user privileges.
- B. It requires the Oracle Grid Infrastructure and Oracle Database instances to be shut down before being invoked.
- C. Users must always input patch plans to opatchauto.
- D. It performs a shutdown and then a restart of all processes in both Oracle Grid Infrastructure and Oracle Database home during the patching process.
- E. It applies patches in nonrolling mode by default.
- F. It is used to apply interim patches to Oracle Grid Infrastructure and Oracle Database home combinations.
- G. Patches are applied via opatchauto.
Answer: A,D,G
NEW QUESTION 35
Which two are true about creating RMAN backups for an Oracle container database? (Choose two.)
- A. Tablespaces from different PDBs with identical names must be backed up by connecting RMAN separately to each PDB to back up the tablespaces.
- B. The BACKUP DATABASE PLUS ARCHIVELOG command will back up archive logs when RMAN is connected to a PDB.
- C. The BACKUP DATABASE command will create a pluggable database (PDB) backup when RMAN is connected to a PDB.
- D. The BACKUP PLUGGABLE DATABASE command can be used to back up CDB$ROOT.
- E. SPFILE backups can be created while connected to an application root PDB.
Answer: A,C
NEW QUESTION 36
Which three are true about actions that can or cannot be performed by users with the SYSBACKUP privilege?
(Choose three.)
- A. They cannot drop tablespaces.
- B. They can view data from any data dictionary view or dynamic performance view.
- C. They can view data from any user-defined tables.
- D. They can drop any tablespace.
- E. They can create any table.
- F. They cannot create restore points.
Answer: A,E
NEW QUESTION 37
Which three are true about Optimizer Statistics Advisor? (Choose three.)
- A. It is part of the DBMS_ADVISOR package.
- B. It is part of the DBMS_STATS package.
- C. It can recommend changes to improve the statistics gathering process.
- D. It always analyzes all schemas in the database.
- E. It runs automatically every night by default.
- F. It can be run only manually.
Answer: B,C,F
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 Reference:
https://oracle-base.com/articles/12c/optimizer-statistics-advisor-12cr2
NEW QUESTION 38
Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases? (Choose two.)
- A. A PDB snapshot depends on a storage snapshot which can be stored on any file system.
- B. A snapshot copy PDB depends on a storage snapshot which can be stored on any file system.
- C. A PDB snapshot depends on a storage snapshot which can only be stored on specific file systems.
- D. A PDB snapshot is always a sparse copy of the source PDB.
- E. A PDB snapshot is always a full copy of the source PDB.
- F. A snapshot copy PDB can be created from a stand-alone clone PDB.
- G. A snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems.
Answer: C,E
NEW QUESTION 39
Which statement correctly describes the SQL profiling performed by the SQL Tuning Advisor?
- A. It is a set of recommendations by the optimizer to create new indexes.
- B. It is auxiliary information collected by the optimizer for a SQL statement to eliminate estimation error.
- C. It is a set of recommendations by the optimizer to change the access methods used.
- D. It is a set of recommendations by the optimizer to restructure a SQL statement to avoid suboptimal execution plans.
- E. It is auxiliary information collected by the optimizer for a SQL statement to help use better joins orders.
Answer: D
NEW QUESTION 40
Which three are true about requirements for various FLASHBACKoperations? (Choose three.)
- A. FLASHBACKversion query requires that the RECYCLEBINparameter be set to ON.
- B. FLASHBACKtransaction query requires undo to retrieve all versions of a row that existed between two points in time.
- C. FLASHBACKdrop requires that the RECYCLEBIN parameter be set to ON.
- D. FLASHBACKversion query requires undo to retrieve all versions of a row that existed between two points in time.
- E. FLASHBACK DATA ARCHIVErequires undo to store all versions of all rows of a table being tracked.
- F. FLASHBACKdrop requires undo to retrieve all versions of a row that existed between two points in time.
Answer: A,B,C
Explanation:
Explanation/Reference:
https://books.google.com.pk/books?id=0iwrL9P25Z0C&pg=PA35&lpg=PA35&dq=FLASHBACK+transaction
+query+requires+undo+to+retrieve+all+versions+of+a+row+that+existed+between+two+points+in
+time&source=bl&ots=MJnYl5CZ1u&sig=ACfU3U0dWP-NPd-
U8uu3zbaoi3YZzT0FTQ&hl=en&sa=X&ved=2ahUKEwigi5_Jl9joAhXzUBUIHUh4DksQ6AEwAnoECAsQJg#v=o nepage&q=FLASHBACK%20transaction%20query%20requires%20undo%20to%20retrieve%20all%20versions
%20of%20a%20row%20that%20existed%20between%20two%20points%20in%20time&f=false
https://docs.oracle.com/cd/E18283_01/server.112/e17120/tables011.htm
NEW QUESTION 41
Which two are true about the Program Global Area (PGA) and its management in an Oracle database instance? (Choose two.)
- A. PGA_AGGREGATE_LIMIT is a hard limit on the PGA size for any one session.
- B. Sorts and Hash Joins use PGA memory.
- C. The private SQL area (UGA) is located in the System Global Area (SGA) when using shared servers.
- D. The private SQL area (UGA) is located in the System Global Area (SGA) when using dedicated servers.
- E. The entire PGA is located in the System Global Area (SGA) when using shared servers.
Answer: A,D
NEW QUESTION 42
Which two are facets of performance planning that should always be considered or implemented for an Oracle Database environment? (Choose two.)
- A. using check constraints to speed up updates
- B. the configuration of storage arrays
- C. the physical data model
- D. defining primary keys for all tables to speed up all queries
- E. defining foreign keys for all tables to speed up joins
Answer: B,D
NEW QUESTION 43
Examine this configuration:
* CDB1 is an Oracle Database 12c Release 2 database containing pluggable databases PDB$SEED, PDB1, and PDB2.
* PDB$SEED is open READ ONLY
* PDB1 is open READ WRITE
* PDB2 is MOUNTED.
* ORACLE_HOME is /u01/app/oracle/product/18.1.0/dbhome_1.
You execute these commands before upgrading the database to the current release:
For which databases will fixup scripts be created?
- A. PDB$SEED, PDB1, and PDB2 only
- B. CDB1 and PDB$SEED only
- C. CDB1, PDB1, and PDB2 only
- D. CDB1, PDB$SEED, and PDB1 only
- E. CDB1, PDB$SEED, PDB1, and PDB2
Answer: D
NEW QUESTION 44
Which three actions are performed by Database Upgrade Assistant (DBUA)? (Choose three.)
- A. It sets all user tablespaces to "read-only" before starting the upgrade.
- B. It empties the RECYCLE BIN.
- C. It performs prerequisite checks to verify if the Oracle database is ready for upgrade.
- D. It increases tablespace size, if required, to meet upgrade requirements.
- E. It removes the AUDSYS schema and the AUDIT_ADMIN and AUDIT_VIEWER roles
- F. It recompiles all stored PL/SQL code by using utlrp.sql.
Answer: C,D,F
NEW QUESTION 45
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