Free Oracle 1Z0-083 Exam Questions

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

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Total 285 Questions | Updated On: Nov 20, 2025

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Question 1

Which three are true about requirements for various FLASHBACK operations? (Choose three.)

A : FLASHBACK transaction query requires undo to retrieve all versions of a row that existed between two points in time.

B : FLASHBACK drop requires that the RECYCLEBIN parameter be set to ON.

C : FLASHBACK version query requires that the RECYCLEBIN parameter be set to ON.

D : FLASHBACK DATA ARCHIVE requires undo to store all versions of all rows of a table being tracked.

E : FLASHBACK drop requires undo to retrieve all versions of a row that existed two points in time.

F : FLASHBACK version query requires undo to retrieve all versions of a row that existed between two points in time.

Answer: A,B

Question 2

Which two are true about instance recovery? (Choose two.)

A : It is not possible if an archived log is missing.

B : It is performed automatically after the database is opened; however, blocks requiring recovery are not available until they are recovered.

C : Setting FAST_START_MTTR_TARGET to a lower value reduces instance recovery time by causing dirty buffers to be written to disk more frequently, thereby reducing the number of I/Os needed during instance recovery.

D : It is performed by the Recovery Writer (RVWR) background process.

E : Setting FAST_START_MTTR_TARGET to a higher value reduces instance recovery time by causing The log writer to write more frquently, thereby reducing the number of I/Os needed during instance recovery.

F : It is performed automatically while the database remains in MOUNT state. Then the database is opened.

Answer: A,C

Question 3

Choose two. Which two are true about an RPM-based Oracle Database installation?

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 performs a software-only Oracle Database installation.

E : It uses a service configuration script to create a single-instance database as part of the installation.

Answer: B,D

Question 4

Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

A : The number of table rows is considered when evaluating the cost of accessing a table using an index.

B : Index balanced B*Tree height is considered when evaluating the cost of using an index.

C : The Statistics Advisor can help recommend the best way to gather statistics.

D : Statistics collected using DBMS_STATS always yield the best optimizer result.

E : The Statistics Advisor generates actions for all recommendations.

Answer: B,C

Question 5

Choose three. In which three situations can you use threshold server-generated alerts to help diagnose and fix problems?

A : when free space in a dictionary managed tablespace falls below a specified percentage

B : when free space in a locally managed tablespace falls below a specified percentage

C : when the total number of locked user account exceeds a specific value

D : when the number of logons per second exceeds a specific value

E : when a resumable statement is suspended

F : when the total number of logons exceeds a specific value

Answer: B,C,D

Page: 1 / 57

Total 285 Questions | Updated On: Nov 20, 2025

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