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Welcome to the Concurrency Control MCQs Page

Dive deep into the fascinating world of Concurrency Control with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Concurrency Control, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Concurrency Control, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

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Check out the MCQs below to embark on an enriching journey through Concurrency Control. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Concurrency Control. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Concurrency Control MCQs | Page 4 of 15

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Q31.
State true or false: It is not necessarily desirable for a transaction to unlock a data item immediately after its final access

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q32.
The situation where no transaction can proceed with normal execution is known as ________

a.

Road block

b.

Deadlock

c.

Execution halt

d.

Abortion

Discuss
Answer: (b).Deadlock
Q33.
The protocol that indicates when a transaction may lock and unlock each of the data items is called as __________

a.

Locking protocol

b.

Unlocking protocol

c.

Granting protocol

d.

Conflict protocol

Discuss
Answer: (a).Locking protocol
Q34.
If a transaction Ti may never make progress, then the transaction is said to be ____________

a.

Deadlocked

b.

Starved

c.

Committed

d.

Rolled back

Discuss
Answer: (b).Starved
Q35.
The two phase locking protocol consists which of the following phases?

a.

Growing phase

b.

Shrinking phase

c.

More than one of the mentioned

d.

None of the mentioned

Discuss
Answer: (c).More than one of the mentioned
Q36.
If a transaction may obtain locks but may not release any locks then it is in _______ phase

a.

Growing phase

b.

Shrinking phase

c.

Deadlock phase

d.

Starved phase

Discuss
Answer: (a).Growing phase
Q37.
If a transaction may release locks but may not obtain any locks, it is said to be in ______ phase

a.

Growing phase

b.

Shrinking phase

c.

Deadlock phase

d.

Starved phase

Discuss
Answer: (b).Shrinking phase
Q38.
A system is in a _______ state if there exists a set of transactions in which every transaction is waiting for another transaction in the set.

a.

Deadlock

b.

Starved

c.

Isolated

d.

None of the mentioned

Discuss
Answer: (a).Deadlock
Q39.
Which of the following is not a method in deadlock handling

a.

Deadlock prevention

b.

Deadlock detection

c.

Deadlock recovery

d.

Deadlock distribution

Discuss
Answer: (d).Deadlock distribution
Q40.
Deadlocks can be prevented using

a.

Preemption and transaction rollbacks

b.

Wait and die scheme

c.

Wound-wait scheme

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Page 4 of 15

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