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Operating system mcqs atomic transactions
Question 6 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
The undo and redo operations must be ..... to guarantee correct behaviour, even if a failure occurs during recovery process.
idempotent | |
easy | |
protected | |
all of the mentioned |
Question 6 Explanation:
Idempotent - Multiple executions of an operation have the same result as does one execution.
Question 7 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
The system periodically performs checkpoints that consists of the following operation(s) .....
Putting all the log records currently in main memory onto stable storage | |
putting all modified data residing in main memory onto stable storage | |
putting a log record onto stable storage | |
all of the mentioned |
Question 8 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
The growing phase is a phase in which?
A transaction may obtain locks, but does not release any | |
A transaction may obtain locks, and releases a few or all of them | |
A transaction may release locks, but does not obtain any new locks | |
A transaction may release locks, and does obtain new locks |
Question 9 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Write ahead logging is a way .....
to ensure atomicity | |
to keep data consistent | |
that records data on stable storage | |
all of the mentioned |
Question 10 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
In the write ahead logging a ..... is maintained.
a memory | |
a system | |
a disk | |
a log record |
There are 10 questions to complete.