Database Systems MCQs - Chapter 3

Concurrency Control Trivia Questions and Answers PDF - 4

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Concurrency Control Questions & Answers PDF Download: MCQ Quiz 4

MCQ 16: In preemption technique, transactions are assigned a unique timestamp to decide whether it should wait or

Executed
Committed
Aborted
Rolled back

MCQ 17: Snapshot isolation is a scheme of

Multiversion concurrency-control
Multiversion two-phase locking
Multiversion timestamp ordering
Multiversion one-phase locking

MCQ 18: The two modes of locking a data item, are termed as 'shared' and

Composite
Compatible
Exclusive
Linear

MCQ 19: Two-phase locking does not ensure freedom from

Obtain locks
Release locks
New locks
Deadlocks

MCQ 20: A set of rules applied over a transaction that may lock and unlock each of the data items in the database, is known to be

Unlocking protocol
Locking protocol
Deadlock protocol
Validation protocol

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