Free Oracle 1Z0-083 Exam Questions

Become Oracle Certified with updated 1Z0-083 exam questions and correct answers

Page: 1 / 57

Total 285 Questions | Updated On: Feb 21, 2026

Add To Cart

Question 1

Choose three. Which three are true about the FLASHBACK DATABASE feature?

A : FLASHBACK DATABASE only uses FLASHBACK LOGS to get the database to the desired flashback time.

B : It requires that the target database be in ARCHIVELOG mode.

C : FLASHBACK LOGS are archived after a log switch.

D : A database can be flashed back using SQL*PLUS.

E : It always generates REDO and UNDO.

F : Queries and DML have the same FLASHBACK LOG overhead when flashback is enabled for a database.

Answer: A,B,D

Question 2

Which two are true about Oracle Flashback features? (Choose two.)

A : FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVE D REDO LOG files.

B : FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVE D REDO LOG files.

C : FLASHBACK TABLE can undrop a column.

D : FLASHBACK DROP can undrop an index when undropping a table.

E : After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.

Answer: A,D

Question 3

Choose three. Which three are true about the Oracle Optimizer?

A : It considers the filters in WHERE clauses when generating execution plans for SQL statements.

B : It obeys all hints.

C : It considers object statistics when generating execution plans for SQL statements.

D : It updates stale object statistics in the Data Dictionary.

E : It can only use SQL Plan Directives tied to the SQL statement for which a plan is being generated.

F : It can re-optimize execution plans after previous executions detect suboptimal plans.

Answer: A,D

Question 4

Choose the best answer. Which should be tuned first when doing a performance tuning exercise for an Oracle Database environment?

A :

log writer performance

B :

database writer performance

C :

general operating system health

D :

SQL statements

E :

database instance memory management and sizes

Answer: C

Question 5

Choose the best answer. Examine this configuration:
1. CDB1 is a container database running in ARCHIVELOG mode.
2. Multiple uncommitted transactions are running in CDB1.
3. Redo log groups 1 and 2 are INACTIVE.
4. Redo log group 3 is the CURRENT group
All members of redo log group 3 are lost before it is archived. Examine these possible steps:
1. SHUTDOWN ABORT
2. STARTUP NOMOUNT
3. STARTUP MOUNT
4. ALTER DATABASE MOUNT
5. RESTORE DATABASE
6. RECOVER DATABASE NOREDO
7. RECOVER DATABASE UNTIL AVAILABLE
8. RESTORE ARCHIVELOG ALL
9. ALTER DATABASE OPEN
10. ALTER DATABASE OPEN RESETLOGS
Choose the minimum required steps in the correct order to recover the database.

A : 1,3,5, 6, 9

B : 1,3,5, 7, 10

C : 1,2, 5, 7,4, 10

D : 1,3, 5, 6, 10

E : 1,3,5, 6, 10

F : 1,3,5,8, 6, 10

Answer: B

Page: 1 / 57

Total 285 Questions | Updated On: Feb 21, 2026

Add To Cart