【优技教育】Oracle 19c OCP 082题库(Q 19题)- 2024年修正版
考试科目:1Z0-082
考试题量:90
通过分数:60%
考试时间:150min
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原文地址:http://www.cuug.com.cn/ocp/082kaoshitiku/38228860619.html
第19题:
Q 19、
Choose two
Which two are true about rollbacks?
A) The ROLLBACK statement does not release locks resulting from table updates.
B) A transaction interrupted by a system failure is automatically rolled back.
C) Data Control Language (DCL) statements, such as GRANT and REVOKE, can be rolled back.
D) If the ROLLBACK statement is used without TO SAVEPOINT, then all savepoints in the transaction are deleted
E) Data consistency is not guaranteed after a rollback.
Answer:BD
(解析:该题是回滚的考点,事务的完成有提交和回滚,不管哪个,都会释放锁,该考点不难,即使第一次出现,自己应该也能够判断出来。)
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