Database Systems MCQs - Chapter 3

Concurrency Control Multiple Choice Questions (MCQs) PDF Download - 5

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Concurrency Control Questions & Answers PDF Download: MCQ Quiz 5

MCQ 21: Deadlock recovery is possible by using the scheme(s)

Deadlock recovery
Deadlock detection
Deadlock elimination
Both A and B

MCQ 22: For controlling preemption, each transaction can be assigned a unique

Order
Identifier
Locator
Timestamp

MCQ 23: A protocol that permits a transaction to lock a new data item only if it has not yet unlocked any data item, is called

Two-phase unlocking protocol
One-phase locking protocol
Two-phase locking protocol
One-phase unlocking protocol

MCQ 24: A time stamp-ordering scheme ensures

Serializability
Cascading
Atomicity
Consistency

MCQ 25: The data item may be locked by

2 modes
3 modes
4 modes
5 modes

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