Operating System MCQs

A. Putting all the log records currently in main memory onto stable storage
B. Putting all modified data residing in main memory onto stable storage
C. Putting a log record onto stable storage
D. All of the mentioned

A. There is a need to perform an undo operation on t1
B. There is a need to perform a redo operation on t1
C. There is no need to perform an undo and redo operation on t1
D. All of the mentioned

A. Concurrent execution of transactions is equivalent to the transactions executed serially
B. The transactions can be carried out one after the other
C. A valid result occurs after execution transactions
D. None of the mentioned

A. Governs how locks are acquired
B. Governs how locks are released
C. Governs how locks are acquired and released
D. None of the mentioned

A. Growing & shrinking phase
B. Shrinking & creation phase
C. Creation & growing phase
D. Destruction & creation phase

A. A transaction may obtain locks, but does not release any
B. A transaction may obtain locks, and releases a few or all of them
C. A transaction may release locks, but does not obtain any new locks
D. A transaction may release locks, and does obtain new locks

A. A transaction may obtain locks, but does not release any
B. A transaction may obtain locks, and releases a few or all of them
C. A transaction may release locks, but does not obtain any new locks
D. A transaction may release locks, and does obtain new locks

A. I only
B. Ii only
C. Both i and ii
D. Neither i nor ii

A. Abort one or more processes to break the circular wait
B. Abort all the process in the system
C. Preempt all resources from all processes
D. None of the mentioned

A. Abort all deadlocked processes
B. Abort all processes
C. Abort one process at a time until the deadlock cycle is eliminated
D. All of the mentioned