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Oracle 1Z0-083 Online Practice Questions and Exam Preparation

1Z0-083 Exam Details

  • Exam Code
    :1Z0-083
  • Exam Name
    :Oracle Database Administration II
  • Certification
    :Oracle Certifications
  • Vendor
    :Oracle
  • Total Questions
    :273 Q&As
  • Last Updated
    :May 31, 2026

Oracle 1Z0-083 Online Questions & Answers

  • Question 151:

    Which two are true about RMAN virtual private catalogs (VPCs)? (Choose two.)

    A. RMAN uses Oracle Virtual Private Database (VPD) to implement VPCs
    B. Each VPC is owned by the recovery catalog schema owner
    C. VPC functionality is enabled by default
    D. The RMAN catalog owner can grant access for an already registered database to a new virtual catalog owner
    E. Only one target database can be registered in a VPC

  • Question 152:

    You want to create a duplicate database DUP_DB from your production database PROD on the same host. The PROD database uses Automatic Storage Management (ASM) for storage. Regular backups are taken using RMAN connected to a recovery catalog. You create an auxiliary instance and want to execute the command: RMAN> DUPLICATE TARGET DATABASE TO dup_db FROM ACTIVE DATABASE;

    What is a prerequisite for the successful execution of this command?

    A. RMAN must be connected to the target database instance and the auxiliary instance.
    B. A most recent backup set of the PROD database must exist.
    C. Flashback must be enabled for the PROD database.
    D. The target database must be in MOUNT state.

  • Question 153:

    In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments. On further investigation, you f ind that buffer busy waits is caused by contention on data blocks. Which option would you consider first to decrease the wait event immediately?

    A. Decreasing PCTUSED
    B. Decreasing PCTFREE
    C. Increasing the number of DBWN process
    D. Using Automatic Segment Space Management (ASSM) E. Increasing db_buffer_cache based on t he V$DB_CACHE_ADVICE recommendation

  • Question 154:

    Which three statements are true about the key store storage framework for transparent data encryption?

    A. It facilitates and helps to enforce keystore backup requirements.
    B. It handles encrypted data without modifying applications.
    C. It enables a keystore to be stored only in a file on a file system.
    D. It enables separation of duties between the database administrator and the security administrator.
    E. It transparently decrypts data for the database users and applications that access this data.
    F. It helps to track encryption keys and implement requirements such as keystore password rotation and master encryption key reset or re-key operations.

  • Question 155:

    Examine these RMAN commands:

    RMAN> CONNECT TARGET "sbu@prod AS SYSBACKUP";

    RMAN> CONNECT AUXILIARY "sbu@dup_db AS SYSBACKUP";

    RMAN> DUPLICATE TARGET DATABASE TO dup_db

    FROM ACTIVE DATABASE

    PASSWORD FILE

    SECTION SIZE 400M;

    Which statement is true about the DUPLICATE command?

    A. It succeeds.
    B. It fails because no parallel channels are allocated for the auxiliary database.
    C. It fails because connection to the AUXILIARY instance must be as SYSDBA.
    D. It succeeds only if the target database is greater than 400M.
    E. No catalogued backup of the TARGET is used to duplicate the database.

  • Question 156:

    You want to install Oracle Grid Infrastructure for a Standalone Server using Oracle Universal Installer (OUI). There is no existing Oracle installation on the server. Which two are prerequisites? (Choose two).

    A. an operating system user to own this installation
    B. the Oracle Inventory group oinstall
    C. an operating system account called grid
    D. a group called dba
    E. the installation of Oracle ASMLIB

  • Question 157:

    Examine this configuration:

    1.

    CDB1 is a container database.

    2.

    PDB1 and PDB2 are pluggable databases in CDB1.

    3.

    PDB1 and PDB2 are OPEN in READ WRITE mode. You execute these commands successfully:

    Which two are true? (Choose two.)

    A. Uncommitted transactions in PDB1 have been rolled back.
    B. PDB1 is closed.
    C. Uncommitted transactions in CDB1 and PDB1 have been rolled back.
    D. CDB1 is shut down.
    E. CDB1 is in MOUNT state

  • Question 158:

    Automatic Shared Memory Management is disabled for one of your database instances.

    Some SQL statements perform poorly due to excessive hard parse activity, thereby degrading performance.

    What would be your next step?

    A. Run the SQL Access Advisor.
    B. Run the Memory Advisor for the shared pool.
    C. Run the SQL Tunning Advisor.
    D. Run the Memory Advisor for the Program Global Area.
    E. Run the Memory Advisor for the System Global Area.

  • Question 159:

    Which two are true about the Automatic Database Diasnostic Monitor (ADDM)? (Choose two.)

    A. It analyzes a period of time corresponding to the 12 hours of activity.
    B. It runs automatically after each AWR snapshot.
    C. A DBA can run it manually.
    D. Results are written to the alert log.
    E. It analyzes a period of time corresponding to the last day of activity.

  • Question 160:

    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

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