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Detailed New 1Z0-083 Exam Questions for Concept Clearance
Successfully passing the 1Z0-083 exam demonstrates a high level of expertise in Oracle database administration and can lead to career advancement opportunities such as promotion and higher salaries. It can also provide a competitive edge in the job market by demonstrating to potential employers that the candidate has the knowledge and skills needed to manage complex database environments.
NEW QUESTION # 34
choose three Which three are true about RMAN duplexed backup sets or image copies?
- A. A backup set may be duplexed so that one copy is written to sbt and the other to disk.
- B. An image copy on disk can be copied to sbt.
- C. A backup set may be duplexed with both copies written to sbt.
- D. An image copy on disk can be copied to disk.
- E. A backup set may be duplexed with both copies written to disk.
- F. An image copy on sbt can be copied to disk.
Answer: C,D,E
NEW QUESTION # 35
Which two are true about RMAN encryption?
- A. The set encryption command overrides encryption settings specified by the configure encryption command.
- B. RMAN encryption keys are stored in a database keystore.
- C. RMAN can encrypt the Oracle Database password file.
- D. Dual-mode encrypted backups can be restored only if both the password and the keystore used for encryption are available.
- E. Password encryption can be persistently configured using the configure encryption command.
Answer: A,B
NEW QUESTION # 36
Which three are true about the FLASHBACK DATABASE feature? (Choose three.)
- A. FLASHBACK LOGS are archived after a log switch.
- B. A database can be flashed back using SQL*PLUS.
- C. It requires that the target database be in ARCHIVELOG mode.
- D. Queries and DML have the same FLASHBACK LOG overhead when flashback is enabled for a database.
- E. FLASHBACK DATABASE only uses FLASHBACK LOGS to get the database to the desired flashback time.
- F. It always generates REDO and UNDO.
Answer: B,C,D
NEW QUESTION # 37
Which operating system group is NOT needed to perform an Oracle Database installation?
- A. OSASM
- B. OSOPER
- C. OSRACDBA
- D. OSDBA
- E. OSKMDBA
Answer: C
NEW QUESTION # 38
Which two are true about reclaiming space used by Flashback logs in Oracle Database 19c and later releases? (Choose two.)
- A. Space is always reclaimed proactively before space pressure occurs.
- B. Space might be reclaimed automatically when the retention period for Flashback logs is lowered.
- C. Space might be reclaimed proactively before space pressure occurs.
- D. Space is only reclaimed when there is space pressure in the Fast Recovery Area. (FRA)
- E. Space is always reclaimed automatically when the retention period for Flashback logs is lowered.
Answer: A,E
Explanation:
The COMPATIBLE initialization parameter must be set to 19.0.0 or higher.
Oracle Database monitors flashback logs in the fast recovery area and automatically deletes flashback logs that are beyond the retention period. When the retention target is reduced, flashback logs that are beyond the retention period are deleted immediately.
In scenarios where a sudden workload spike causes a large number of flashback logs to be created, the workload is monitored for a few days before deleting flashback logs that are beyond the retention period. This avoids the overhead of recreating the flashback logs, if another peak workload occurs soon after.
https://docs.oracle.com/en/database/oracle/oracle-database/19/newft/new-features.html#GUID-
4DE9FA4A-BA27-434A-A68E-0B58D8FD686B
NEW QUESTION # 39
Which statement describes the significance of the CHANGE FAILURE command in RMAN? (Choose all that apply.)
- A. It is used to explicitly close the open failures.
- B. It is used to change failure priority only for the CRITICAL priority.
- C. It is used to inform the database about the repair after the repair script executes.
- D. It is used to change failure priority only for HIGH or LOW priorities.
- E. It is used to execute the advised repair script.
Answer: A,D
NEW QUESTION # 40
Which three are true about Transparent Data Encryption (TDE)?
- A. It stores the current and all past master keys in the keystore.
- B. It uses a single master key for a database.
- C. It can encrypt data at the column level.
- D. Master encryption keys are managed by Oracle Database Vault.
- E. It replaces secure application roles.
- F. It encrypts only data on the client.
Answer: A,C,D
NEW QUESTION # 41
Which two are true about Oracle instance recovery? (Choose three.)
- A. Recovery begins from the beginning of the CURRENT redo log group.
- B. Recovery reads redo until the end of the redo thread. SMON rollsback any dead transactions, and then the datanase is opened.
- C. Recovery begins from the last checkpoint position that was recorded in the control file by the checkpoint process (CKPT).
- 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 wascalculated by the Database Writer before instance failure.
- 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: B,D,E
NEW QUESTION # 42
Which two are true about data movement between a non-CDB and a PDB using Data Pump? (Choose two.)
- A. Oracle attempts to convert common users to conventional users when moving schemas from a PDB to a non-CDB.
- B. Oracle attempts to convert conventional database users to local users when moving schemas from a non- CDB to a PDB.
- C. Moving data from a non-CDB to a PDB is only possible by using conventional export and import.
- D. Moving data from a PDB to a non-CDB is only possible by using transportable tablespace export and import.
- E. Tablespaces are automatically created as neeed while importing full exports in either a non-CDB or a PDB.
- F. A new PDB is automatically created when importing a non-CDB into a CDB.
Answer: A,B
NEW QUESTION # 43
Which three actions are performed by Database Upgrade Assistant (DBUA)?
- A. It Increases tablespace size, if required, to meet upgrade requirements.
- B. It empties the recycle bin.
- C. It performs prerequisite checks to verify if the Oracle database is ready for upgrade.
- D. It recompiles all stored pl/sql code by using utlrp.sql.
- E. It removes the audsys schema and the audit_admin and audit_viewer roles.
- F. It sets all user tablespaces to "read-only" before starting the upgrade.
Answer: B,E,F
NEW QUESTION # 44
You plan to install Oracle Grid Infrastructure for a Standalone Server and Oracle Database for the first time on a server.
Examine this command and its outcome:
Which two are true? (Choose two.)
- A. oraclewill be granted the SYSASMprivilege when installing the Oracle Database software.
- B. oraclecan own an Oracle Database installation but not an Oracle Grid Infrastructure installation.
- C. oracle must be the owner of every Oracle Database installation.
- D. The user account, oracle, and group, oinstall, can be used for all Oracle software installations.
- E. oraclewill be an owner of the Oracle Inventory.
Answer: A,B
NEW QUESTION # 45
Which three are true about Recovery Manager (RMAN) in Oracle Database 19c and later releases? (Choose three.)
- A. A Virtual Private Catalog used to register a container database can be created in a non-container database.
- B. It isalways possible for RMAN to connect to a pluggable database as a target if any RMAN Catalog is used.
- 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 registera container database can be created in a pluggable 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.
Answer: A,D,F
NEW QUESTION # 46
Examine this configuration:
1. CDB1 is a container database.
2. APP_ROOT is an application root in CDB1.
3. APP_PDB1 is an application PDB in APP_ROOT.
4. FLASHBACK DATABASE is ON.
You execute these commands:
Which table or set of tables will exist after the Flashback operation has completed?
- A. none of the tables, because all three tables will be dropped
- B. CDB1_TAB and APP_PDB1_TAB
- C. CDB1_TAB and APP_ROOT_TAB
- D. CDB1_TAB only
- E. CDB1_TAB, APP_ROOT_TAB, and APP_PDB1_TAB
Answer: E
NEW QUESTION # 47
Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed:
Which three are true?
- A. Application PDBs that are subsequently created in the APP1 application container will be cloned from APP1$SEED.
- B. APP1 can never be unplugged.
- C. An application root PDB is created for APP1.
- D. A default service Is created for the application root APP1.
- E. An application seed PDB Is created for APP1.
- F. Application PDBs that are subsequently created in the APP1 application container will be cloned from PDB$SEED.
Answer: A,C,D
NEW QUESTION # 48
Which two are true about poorly performing SQL statements and their tuning in Oracle database instances? (Choose two.)
- A. SQL statements performing many physical I/Os can always have their performance improved by creating indexes.
- B. Poorly performing SQL statements can be tuned automatically by the Oracle server.
- C. The solution that best optimizes one SQL statement can degrade the performance of others.
- D. SQL statements doing joins always do more physical I/O than single table queries.
- E. SQL statements doing only logical reads never require tuning because they do no physical I/O.
Answer: B,C
Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28274/sql_tune.htm#PFGRF028
NEW QUESTION # 49
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. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to CDB$ROOT.
- B. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to PDB1.
- C. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to PDB1.
- D. Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to CDB$ROOT.
- E. This cannot be done due to the lack of a clean restore point.
Answer: C
NEW QUESTION # 50
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