Database Systems MCQs - Chapter 21

SQL Concepts and Queries MCQ (Multiple Choice Questions) PDF - 2

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SQL Concepts and Queries Questions & Answers PDF Download: MCQ Quiz 2

MCQ 6: SQL allows comparison operations on the data types i.e.

A) time

B) date

C) timestamp

D) All datatypes

MCQ 7: In the case of power outage or other system crash, when the system restarts, the action known to be occur is of

A) Rollback work

B) Trace work

C) Traceback work

D) Commit work

MCQ 8: The current date is returned by the method

A) system.date

B) current.date

C) machine.date

D) today.date

MCQ 9: All the statements between the keywords begin atomic ...end form a/an

A) Single transaction

B) NO transaction

C) Multiple transactions

D) 2 parallel transactions only

MCQ 10: Any relation that is not part of the logical model, but is made visible to a user as a

A) Natural relation

B) Absolute relation

C) Virtual relation

D) Linear relation

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