2025 Valid 1Z0-083 test answers & Oracle Exam PDF [Q145-Q168]

2025 Valid 1Z0-083 test answers & Oracle Exam PDF

Free Oracle 1Z0-083 Exam Questions and Answer from Training Expert VCETorrent

Oracle 1Z0-083 exam consists of 80 multiple-choice questions and has a duration of 105 minutes. 1Z0-083 exam is administered by Pearson VUE and can be taken at a testing center or online. The passing score for the exam is 63%, and candidates who pass the exam will receive a digital badge and a certificate of achievement.

Oracle 1Z0-083 exam is a challenging certification test designed for professionals who want to validate their skills in Oracle database administration. Passing 1Z0-083 exam is a prerequisite to becoming an OCP certified professional, and it requires a solid understanding of database administration concepts and hands-on experience in managing Oracle databases. With proper preparation and dedication, candidates can successfully pass the exam and advance their careers in the field of database administration.

Oracle 1Z1-083 certification exam is an important milestone for database administrators who want to demonstrate their skills and expertise in managing and administering Oracle databases. Oracle Database Administration II certification is recognized globally and is highly valued by organizations that use Oracle databases. It also serves as a benchmark for employers looking to hire database administrators who have a proven track record of managing and administering Oracle databases.

 

NEW QUESTION # 145
Which four are true about RMAN backup sets?

• A. A backup set must be written to disk.
• B. Blocks from multiple data files can be contained in one backup piece.
• C. A data file can be split into multiple sections stored in different backup sets.
• D. Blocks from multiple data files can be contained in one backup set.
• E. A data file can be split into multiple sections stored in different backup pieces in the same backup set.
• F. A backup set must be written to media.
• G. A backup piece can belong to only one backup set.
• H. A backup set can contain only one backup piece.

Answer: A,B,C,E

NEW QUESTION # 146
Which two statements are true when row-archival management is enabled?

• A. The ORA_ARCHIVE_STATE column may only be queried by users with the DBA role set.
• B. The ORA_ARCHIVE_STATE column is updated in an overnight maintenance job based on activity tracking.
• C. The ORA_ARCHIVE_STATE column may only be updated by users with the DBA role set.
• D. The ORA_ARCHIVE_STATE column is only displayed if it is referenced in the column select list of a query
• E. The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows.

Answer: D,E

NEW QUESTION # 147
Choose two. Which two are true in Oracle 19c and later releases?

• A. Schema Only accounts can be granted administrator privileges.
• B. Unified Auditing can be configured to audit only events that are issued indirectly by all users
• C. All the Oracle-supplied accounts are Schema Only accounts.
• D. Unified Auditing can be configured to audit only events that are issued directly by an audited user.
• E. If the password file location changes, then the instance must be restarted.

Answer: A,D

NEW QUESTION # 148
Which three are true about Database Point-in-Time Recovery?

• A. The target point for the recovery must be specified as a time or System Change Number (SCN).
• B. The database must be open resetlogs after Database Point-in-Time Recovery.
• C. The database must have flashback database on to perform Database Point-in-Time Recovery.
• D. The database must be in archivelog mode.
• E. The database must be in mount state when performing Database Point-in-Time Recovery.
• F. Database Point-in-Time Recovery is performed by the Managed Recovery Process (MRP)

Answer: A,C,E

NEW QUESTION # 149
Which two are true about an RPM-based Oracle Database installation? (Choose two.)

• A. It includes the Oracle Preinstallation RPM.
• B. From Oracle Database 18c, a single RPM can be used to install only Oracle Database Server for a single instance.
• C. It requires an Unbreakable Linux Network (ULN) subscription.
• D. It uses a service configuration script to create a single-instance database as part of the installation.
• E. It performs a software-only Oracle Database installation.

Answer: D,E

Explanation:
https://docs.oracle.com/en/database/oracle/oracle-database/18/ladbi/running-rpm-packages-to- install-oracle-database.html#GUID-BB7C11E3-D385-4A2F-9EAF-75F4F0AACF02

NEW QUESTION # 150
You are managing this configuration:
1. CDB1 is a container database.
2. BDB1 and PDB2 are two pluggable databases in CDB1.
3. user1 .EMP Is a table In PDBI and user2.DEPT is a table in PDB2.

Which two are true?

• A. The inserts on USER1.EMP were rolled back when the session connected to pdb2.
• B. The insert on user2.dept is uncommitted.
• C. The inserts on USER1 . EMP were committed when the session connected to pdb2.
• D. The insert on user2.dept Is a recursive autonomous transaction by the child session and is committed.
• E. The insert on user2.dept fails because of the active transaction in the parent container.
• F. The inserts on USER 1 . EMP remain uncommitted when the session connected to pdb2.
• G. The inserts on USER1. EMP were committed when the session inserted a row into user2 .dept.

Answer: B,D

NEW QUESTION # 151
The HR_ROOT application container must support the execution of a query on a table shared by application local PDBs PDB1 and PDB2, and remote PDB PDB3.
Which three are true? (Choose three.)

• A. PDB3's application root replica must exist in the local CDB.
• B. A proxy PDB must exist in the application root in the local CDB.
• C. A database link must exist in the remote CDB referring to the local CDB.
• D. The HR_ROOT replica must exist in the remote CDB.
• E. A proxy PDB must exist in the application root in the remote CDB.
• F. A database link must exist in the local CDB root referring to the remote CDB.

Answer: B,C,D

NEW QUESTION # 152
Examine these queries and their output:

An online RMAN backup of the CDB was taken an hour before Restore Point ri was created.
You want to recover PDB1 to Restore Point R1.
How do you achieve this?

• A. This cannot be done due to the lack of a clean restore point.
• B. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to PDB1.
• C. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to CDB$ROOT.
• D. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to PDB1.
• E. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to CDB$ROOT.

Answer: B

NEW QUESTION # 153
Which two are true about Optimizer Statistics? (Choose two.)

• A. They are gathered by the SQL Tuning Advisor.
• B. By default, they are automatically gathered by a maintenance job.
• C. They are ignored by Optimizer if they are stale.
• D. They can be gathered by the DBMS_STATS package.
• E. They provide real-time data about schema objects.

Answer: B,D

NEW QUESTION # 154
Which two are true about RMAN backups when using a media manager? (Choose two.)

• A. A media manager is required to create RMAN image copies.
• B. The media manager layer (MML) routines provided by Oracle support any vendors' media management products.
• C. A media manager is required to create RMAN proxy copies.
• D. A media manager always writes RMAN requested backups to tape.
• E. By default, a request for a proxy copy may result in a backup set being created.

Answer: A,D

NEW QUESTION # 155
Which two are true about the automatic execution of operating system scripts when performing silent mode installation starting from Oracle Database 19c? (Choose two.)

• A. The response file must contain the root or sudo password.
• B. The installer will prompt for the root or sudo password.
• C. The response file can specify the root or sudo password.
• D. The response file can specify the path of the sudo program.
• E. Silent install always runs operating scripts automatically.

Answer: B,D

Explanation:
response file options:
oracle.install.db.rootconfig.executeRootScript= true / false
oracle.install.db.rootconfig.configMethod= ROOT / SUDO
oracle.install.db.rootconfig.sudoPath=
oracle.install.db.rootconfig.sudoUserName=
https://oraclefact.wordpress.com/2019/08/05/1-install-oracle-database-19c-with-automatic-root- scripts-execution/

NEW QUESTION # 156
Which two are true about Oracle Flashback features?

• A. flashback drop can undrop an index when undropping a table.
• B. flashback query can retrieve redo records from online and archived redo log files.
• C. After a database is restored from flashback logs using the flashback database command, it is sometimes rolled forward using redo logs.
• D. flashback version query can retrieve redo records from online and archived redo log files.
• E. flashback table can undrop a column.

Answer: B,E

NEW QUESTION # 157
Your container database, CDB1 has an application container, HR_ROOT, with an application PDB, HR_PDB1.
You have the required privilege to clone HR_PDB1 to container database CDB2, which does not contain HR_ROOT Which two are always true?

• A. Cloning HR_ROOT automatically clones HR_PDB1.
• B. The HR_PDB1 clone created in CDB2 will be in mount state when cloning ends.
• C. All transactions in HR_PDB1 of CDB1 must commit before the cloning process starts.
• D. A common user must exist in CDB2 with the create pluggable database privilege.
• E. CDB1 and CDB2 must be In shared undo mode.

Answer: A,D

NEW QUESTION # 158
Which two are true about gathering optimizer statistics? (Choose two.)

• A. System statistics can be gathered only while connected to CDB$ROOT.
• B. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB opened in read/write mode gathers object statistics for that PDB.
• C. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)
• D. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics only in CDB$ROOT.
• E. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open PDBs except PDB$SEED.

Answer: B,C

Explanation:
https://mikedietrichde.com/2016/10/21/gather-fixed-objects-stats-in-pdbs-as-well/#:~:text=Yes%2C%20you'll%20have%20to,independently%20from%20the%20CDB%24ROOT.&text=Oracle%20Database%20automatically%20gathers%20fixed,Automatic%20Optimizer%20Statistics%20Collection%E2%80%9C) .
Reference:
https://docs.oracle.com/en/database/oracle/oracle-database/20/arpls/DBMS_STATS.html

NEW QUESTION # 159
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. The entire PGA is located in the System Global Area (SGA) when using shared servers.
• C. Sorts and Hash Joins use PGA memory.
• D. The private SQL area (UGA) is located in the System Global Area (SGA) when using dedicated servers.
• E. The private SQL area (UGA) is located in the System Global Area (SGA) when using shared servers.

Answer: A,D

NEW QUESTION # 160
Your container database, CDB1, is in local undo mode.
You successfully execute this command while connected to CDB1:
CREATE PLUGGABLE DATABASE pdb1
ADMIN USER pdb1_admin IDENTIFIED BY pdb123 ROLES=(CONNECT)
CREATE_FILE_DEST='/u01/app/oracle/oradata/cdb1/pdb1';
Which three are true about PDB1? (Choose three.)

• A. It has no local users.
• B. It has the same number of roles as CDB1.
• C. Service PDB1 is created for remote logins to PDB1.
• D. It has the same common users defined as does CDB1.
• E. It is in mount state after creation.
• F. It has only local roles.

Answer: B,C,E

Explanation:
You cant create local roles in CDB, only common, so always you will have the same number of roles when you create a pdb, all common roles that you have in CDB.

NEW QUESTION # 161
Choose three. Which three are true about cloning databases into an existing CDB with RMAN?

• A. The target and auxiliary instance passwords must be the same.
• B. A user with SYSDBA or SYSBKUP must be logged in with RMAN to the non-CDB being cloned when cloning a non-CDB.
• C. Only one PDB can be cloned at a time.
• D. Two or more PDBs can be cloned with the same command.
• E. A non-CDB can be cloned into a PDB.
• F. A user with SYSDBA or SYSBKUP must be logged in with RMAN to CDB$ROOT when cloning a PDB.

Answer: B,C,F

NEW QUESTION # 162
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 and target platforms must have the same endianess.
• D. A backup of the PDB must exist, taken using the BACKUP command with the To PLATFORM clause.
• E. The source PDB must not be an application root.
• F. The source PDB can be in MOUNT or OPEN state.

Answer: C,F

NEW QUESTION # 163
Which four are true about RMAN backup sets? (Choose four.)

• A. A data file can be split into multiple sections stored in different backup sets.
• B. Blocks from multiple data files can be contained in one backup piece,
• C. A data file can be split into multiple sections stored in different backup pieces in the same backup set.
• D. A backup set must be written to media.
• E. A backup piece can belong to only one backup set.
• F. A backup set must be written to disk.
• G. Blocks from multiple data files can be contained in one backup set,.
• H. A backup set can contain only one backup piece.

Answer: B,C,E,G

NEW QUESTION # 164
RMAN is connected to a target database instance and an auxilary instance. You execute 3625the command: RMAN> DUPLICATE TARGET DATABASE TO dupdb FROM ACTIVE DATABASE SECTION SIZE 1G; What is the outcome?

• A. RMAN uses the push method to transfer backup sets
• B. RMAN uses the pull method to restore files using image copies
• C. RMAN uses the pull method to restore files using backup sets
• D. RMAN uses the push method to transfer image copies

Answer: C

NEW QUESTION # 165
Identify three benefits of Unified Auditing.

• A. It automatically audits Recovery Manager (RMAN) events.
• B. It guarantees zero-loss auditing.
• C. It improves overall auditing performance.
• D. The audit trail cannot be easily modified because it is read-only.
• E. Decreased use ofstorage to store audit trail rowsin the database.

Answer: A,C,D

NEW QUESTION # 166
Which two are true about the character sets used in an Oracle database? (Choose two.)

• A. Single-byte character sets always use 8-bit encoding schemes.
• B. Multibyte character sets allow more efficient space utilization than single byte character sets.
• C. Unicode enables information from any language to be stored using a single character set.
• D. Single-byte character sets always use 7-bit encoding schemes.
• E. Single-byte character sets provide better performance than multibyte character sets.
• F. Unicode is the only supported character set for Oracle databases created using Database Configuration Assistant (DBCA).

Answer: C,E

Explanation:
A - Single-byte character sets result in better performance than multibyte character sets, and they also are the most efficient in terms of space requirements.
Ref: https://docs.oracle.com/en/database/oracle/oracle-database/19/nlspg/choosing-character- set.html#GUID-BF26E01D-AB92-48FC-855A-69A5B3AF9A92 B - Unicode is a universal encoded character set that enables information from any language to be stored using a single character set.
Ref:
https://docs.oracle.com/cd/B19306_01/server.102/b14225/ch6unicode.htm#:~:text=Unicode%20i s%20a%20universal%20encoded%20character%20set%20that,been%20adopted%20by%20man y%20software%20and%20hardware%20vendors.

NEW QUESTION # 167
Which three are true about opatchauto?

• A. It applies patches in nonrolling mode by default.
• B. Users must always input patch plans to opatchauto.
• C. It performs a shutdown and then a restart of all processes in both Oracle Grid Infrastructure and Oracle Database home during the patching process.
• D. It requires the Oracle Grid Infrastructure and Oracle Database instances to be shut down before being invoked.
• E. It must be invoked by a user with root user privileges.
• F. Patchsets are applied via opatchauto.
• G. It Is used to apply interim patches to Oracle Grid Infrastructure and Oracle Database home combinations.

Answer: A,D,F

NEW QUESTION # 168
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