1Z0-083 Free Exam Questions and Answers PDF Updated on Mar-2024
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Oracle 1Z0-083 (Oracle Database Administration II) Certification Exam is a professional certification exam designed for individuals who want to validate their expertise in Oracle Database Administration. 1Z0-083 exam is the second step in the Oracle Database Administration certification path, following the Oracle 1Z0-082 exam. Passing 1Z0-083 exam demonstrates your advanced knowledge and skills in managing Oracle 19c databases.
Oracle 1Z0-083 certification exam is a challenging but rewarding exam for IT professionals who want to prove their expertise in database administration. Whether you are just starting your career in database administration or have years of experience, passing 1Z0-083 exam will demonstrate your commitment to excellence in your field and enhance your career prospects.
NEW QUESTION # 49
The users tablespace consists of data files 3 and 4 and must always be online in read/write mode. Which two are true about using RMAN to perform an open database back up of this tablespace?
- A. Backups can be done incrementally.
- B. Backups must be contained in backup sets.
- C. Backups can be taken only if the database is in archivelog mode.
- D. Backups must be done incrementally.
- E. The database must be registered in an RMAN catalog.
- F. Only consistent backups can be created.
Answer: A,B
NEW QUESTION # 50
Which three are true about Optimizer Statistics Advisor? (Choose three.)
- A. It runs automatically every night by default.
- B. It can recommend changes to improve the statistics gathering process.
- C. It is part of the DBMS_ADVISOR package.
- D. It always analyzes all schemas in the database.
- E. It is part of the DBMS_STATS package.
- F. It can be run only manually.
Answer: B,E,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 # 51
A container database called CDB1 is OMF-enabled.
PDB_FILE_NAME_CONVERT is not configured in CDB1. PDB1 was unplugged from CDB1 earlier in the week. Examine this command, which will be executed in CDB1:
CREATE PLUGGABLE DATABASE pdb1
USING '/u01/app/oracle/oradata/pdb1.xml'
SOURCE_FILE_NAME_CONVERT =
('/u01/app/oracle/oradata/', '/u02/app/oracle/oradata/');
Which two are true? (Choose two.)
- A. /u01/app/oracle/oradata/pdb1.xml does not contain the current locations of data files for PDB1.
- B. DBMS_PDB.CHECK_PLUG_COMPATIBILITY must be run in CDB1 before executing the command.
- C. PDB1 data files already exist in the correct location.
- D. PDB1 must be dropped from CDB1.
- E. PDB_FILE_NAME_CONVERT must be set before executing the command.
Answer: A,E
NEW QUESTION # 52
Which two are true in Oracle 19c and later releases?
- A. Unified Auditing can be configured to audit only events that are issued directly by an audited user.
- B. If the password file location changes, then the new location is used automatically by the Oracle Server.
- C. All the Oracle-supplied accounts are Schema Only accounts.
- D. Unified Auditing can be configured to audit only events that are issued indirectly by an audited user.
- E. Schema Only accounts can be granted administrator privileges.
Answer: B,E
NEW QUESTION # 53
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 Memory Advisor for the System Global Area.
- B. Run the SQL Access Advisor.
- C. Run the SQL Tunning Advisor.
- D. Run the Memory Advisor for the Program Global Area.
- E. Run the Memory Advisor for the shared pool.
Answer: E
NEW QUESTION # 54
Which three are true about Recovery Manager (RMAN) in Oracle Database 19c and later releases?
- A. A Virtual Private Catalog used to register a container database can be created in a pluggable database.
- B. It Is always possible for RMAN to connect to a pluggable database as a target.
- C. It is only possible for RMAN to connect to a pluggable database as a target if an RMAN Virtual Private Catalog is used.
- D. A Virtual Private Catalog used to register a container database can be created in a non-container database.
- E. A Virtual Private Catalog used to register a container database must be created in a pluggable database.
- F. It Is always possible for RMAN to connect to a pluggable database as a target if any RMAN Catalog is used.
Answer: A,D,F
NEW QUESTION # 55
Which two are true about Oracle instance recovery? (Choose three.)
- A. Recovery begins from the last checkpoint position that was calculated by the Database Writer before instance failure.
- B. Recovery begins from the beginning of the CURRENT redo log group.
- C. Recovery reads redo until the end of the redo thread. SMON rolls back any dead transactions, and then the datanase is opened.
- D. Recovery reads redo until the end of the redo thread, and then opens the database. SMON then rolls back any dead transactions.
- E. Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (CKPT).
- F. 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.
Answer: A,C,D
NEW QUESTION # 56
Which two are true about diagnosing Oracle Database failure situations using Data Recovery Advisor? (Choose two.)
- A. Using the Data Recovery Advisor LIST FAILURE command always requires that the database for which failures are to be listed is in MOUNT state.
- B. The Data Recovery Advisor CHANGE FAILURE command can be used only to change failure priorities.
- C. Data Recovery Advisor can be used if a database is closed.
- D. Data Recovery Advisor can proactively check for failures.
- E. A failure can be closed only when it has been repaired.
Answer: B,D
NEW QUESTION # 57
Choose two. Which two are true about RMAN persistent configuration settings, administration, and their effects?
- A. A DBA must specify either a redundancy retention policy or a recovery window retention policy. B)A target database's persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.
- B. Backups older than the recovery window retention policy are always deleted automatically if the backup location has insufficient space.
- C. Backups written to the fast recovery area (FRA) that are obsolete 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.
Answer: A
NEW QUESTION # 58
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. PDB1 is closed.
- B. Uncommitted transactions in CDB1 and PDB1 have been rolled back.
- C. CDB1 is in MOUNT state
- D. Uncommitted transactions in PDB1 have been rolled back.
- E. CDB1 is shut down.
Answer: A,D
NEW QUESTION # 59
Examine this configuration:
1. CDB1 is a container database.
2. PDB1 and PDB2 are pluggable databases in CDB1.
You execute these commands successfully:
Which two are true?
- A. Redo logs are opened.
- B. PDB1 and PDB2 are in read only state.
- C. PDB$SEED is in read only state.
- D. PDB1 and PDB2 are in mount state.
- E. CDB$ROOT is in mount state.
Answer: A,B
NEW QUESTION # 60
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 Memory Advisor for the System Global Area.
- B. Run the SQL Tuning Advisor.
- C. Run the SQL Access Advisor.
- D. Run the Memory Advisor for the shared pool.
- E. Run the Memory Advisor for the Program Global Area.
Answer: A
NEW QUESTION # 61
Which two arc true about the Automatic Database Diagnostic Monitor (ADDM)?
- A. Results are written to the alert log.
- B. By default it analyzes a period of time corresponding to the last 24 hours of activity.
- C. It runs automatically after each AWR snapshot.
- D. When ADDM reports multiple findings, summing all their impacts can yield to more than 100% of DB time
- E. By default it analyzes a period of time corresponding to the last 4 hours of activity.
Answer: C,D
NEW QUESTION # 62
Choose two. Which two are true about a read-only Oracle home?
- A. It is enabled by performing an Oracle Database installation with database creation and then running the roohctl -enable script.
- B. Its configuration data and log files reside in subdirectories under the Oracle home.
- C. It is enabled by performing a software-only Oracle Database installation and then running the roohctl -enable script.
- D. It requires the Rapid Home Provisioning service.
- E. It contains an image that can be distributed across multiple servers.
Answer: C,E
NEW QUESTION # 63
Which two are true about Oracle instance recovery? (Choose three.)
- A. Recovery begins from the last checkpoint position that was calculated by the Database Writer before instance failure.
- B. Recovery begins from the beginning of the CURRENT redo log group.
- C. Recovery reads redo until the end of the redo thread. SMON rolls back any dead transactions, and then the datanase is opened.
- D. Recovery reads redo until the end of the redo thread, and then opens the database. SMON then rolls back any dead transactions.
- E. Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (CKPT).
- F. Recovery begins from the start of any ACTIVE redo log group or the start of the CURRENT log group if no other group is ACTIV
Answer: A,C,D
NEW QUESTION # 64
Choose three. Which three are true in Oracle 19c and later releases?
- A. Simultaneous data pump jobs can be limited at the pluggable database (PDB) level.
- B. Tablespaces always remain in read/write mode during transportable tablespace operations.
- C. A transportable data pump import can leave a plugged-in tablespace in read/write mode.
- D. A transportable data pump import can leave a plugged-in tablespace in read-only mode.
- E. Tablespaces never remain in read/write mode during transportable tablespace operations.
- F. An ordinary data pump export of a table with encrypted columns will always encrypt the same columns when imported.
Answer: A,C,D
NEW QUESTION # 65
Choose three. Which three are true about using Database Upgrade Assistant (DBUA) to upgrade a database?
- A. The Pre-Upgrade Information Tool script is executed by DBUA.
- B. DBUA must be launched from the target Oracle Home.
- C. All pluggable databases are automatically upgraded as part of a container database upgrade.
- D. The database must be opened in read-only mode.
- E. A whole database backup must exist before upgrade.
- F. Multiple databases with the same ORACLE_HOME can be upgraded simultaneously.
Answer: A,B,C
NEW QUESTION # 66
You notice that the performance of your production 24/7 Oracle 12c database has significantly degraded. Sometimes you are not able to connect to the instance because it hangs. You do not want to restart the database instance. How can you detect the cause of the degraded performance?
- A. Enable Memory Access Mode, which reads performance data from SGA.
- B. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.
- C. Use emergency monitoring to fetch data directly from SGA for analysis.
- D. Use Active Session History (ASH) data and hang analysis in regular performance monitoring,
- E. Run ADDM in diagnostic mode.
Answer: C
NEW QUESTION # 67
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. 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.
- 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. Create the database by using the CREATE DATABASE . . . command and manually import data by using Data Pump.
- D. Use Database Configuration Assistant (DBCA) to create a template from the existing database to contain the database structure.
Answer: A
NEW QUESTION # 68
Which two are true about changing the LOCAL_UNDO_ENABLED property to false in a CDB? (Choose two.)
- A. After the change, only one undo tablespace can exist in CDB$ROOT.
- B. Any new PDB and existing PDBs are automatically configured to use the default undo tablespace in CDB$ROOT.
- C. After the change, any user with the required privilege can create an undo tablespace in the PDBs.
- D. After the change, each existing PDB has to be reopened for the new undo mode to take effect.
- E. After the change, only a common user with the required privilege can create an undo tablespace in CDB&ROOT.
- F. Undo tablespaces existing in PDBs must be dropped before the change.
Answer: A,B
Explanation:
You can set a CDB in local UNDO mode either at CDB creation or by altering the CDB property. When the database property LOCAL_UNDO_ENABLE is FALSE, which is the default, there is only one UNDO tablespace that is created in the CDB root, and that is shared by all containers. When LOCAL_UNDO_ENABLE is TRUE, every container in the CDB uses local undo and each PDB must have its own local UNDO tablespace. To maintain ease of management and provisioning, UNDO tablespace creation happens automatically and does not require any action from the user. When a PDB is opened and an UNDO tablespace is not available, its automatically created.
Reference:
https://docs.oracle.com/en/database/oracle/oracle-database/18/multi/creating-and-configuring-a- cdb.html#GUID-12ADA04D-F81D-4579-A68C-0958CC7D6C2F
NEW QUESTION # 69
Examine this configuration: 1. CDB1 is a container database. 2. COMMON_USER_PREFIX is C##. 3. PDB1 is a pluggable database contained in CDB1. 4. APP1_ROOTis an application container contained in CDB1. 5. APP1_PDB1 is an application PDB contained in APP1_ROOT. You execute these commands successfully: Which two are true? (Choose two.)
- A. APP1_USER1can be created in PDB1.
- B. APP1_USER1 can have different privileges in each Application PDB contained in APP1_ROOT.
- C. C##_USER1will have the same privileges and roles granted in all PDBs in CDB1.
- D. C##_APP_USER1 can be created in CDB1.
- E. APP1_USER1can be created in CDB1.
- F. P1_USER1can be created in CDB1.
Answer: B,D
NEW QUESTION # 70
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Passing the Oracle 1Z1-083 Exam is an important achievement for individuals who want to advance their careers in database administration. Oracle Database Administration II certification demonstrates that the individual has a deep understanding of Oracle database administration concepts and is capable of administering complex Oracle databases. Oracle Database Administration II certification also serves as a credential for individuals who want to work as Oracle database administrators in organizations that use Oracle databases.
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