【OCP 12c】OCP 062最新考试原题解析-第1题

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QUESTION 1

Examine the parameters for your database instance:

NAME TYPE VALUE

-------------------------- ------------------------------- ---------------------------

undo_management string AUTO

undo_retention integer 1200

undo_tablespace string UNDOTBS1

You execute the following command:

SQL> ALTER TABLESPACE undotbs1 RETENTION NOGUARANTEE;

Which statement is true in this scenario?

A. Undo data is written to flashback logs after 1200 seconds.

B. Inactive undo data is retained for 1200 seconds even if subsequent transactions fail due to lack of space in the undo tablespace.

C. You can perform a Flashback Database operation only within t he duration of 1200 seconds.

D. An attempt is made to keep inactive undo for 1200 seconds but transactions may overwrite the undo before that time has elapsed.

Correct Answer: D