【ocp 12c】OCP 062最新考试题库原题带答案-第1题

时间：2019-04-17 来源：

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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