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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 3 of 15

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Q21.
Data integrity control

a.

is used to set upper and lower limits on numeric data

b.

requires the use of passwords to prohibit unauthorized access to the file

c.

has the data dictionary keep the date and time of last access last back-up, and most recent modification for all files

d.

All of the above

Discuss
Answer: (c).has the data dictionary keep the date and time of last access last back-up, and most recent modification for all files
Q22.
The type of constraints that specifies the uniqueness of data stored in the database are considered as

a.

semantics

b.

business rules

c.

controlled rules

d.

structural rules

Discuss
Answer: (a).semantics
Q23.
The property of DBMS which ensures the execution of all the operations in transaction or none of the operation is executed is classified as

a.

isolation property

b.

atomicity property

c.

online execution property

d.

offline execution property

Discuss
Answer: (b).atomicity property
Q24.
The control feature in database management system which ensures the accuracy of data updated by multiple users is classified as

a.

conceptual implementation control

b.

concurrency control

c.

interface modeling control

d.

user accessibility control

Discuss
Answer: (b).concurrency control
Q25.
The property of DBMS which ensures whether the hundreds of applications are executed, each transaction must be executed in isolation is classified as

a.

online execution property

b.

offline execution property

c.

isolation property

d.

atomicity property

Discuss
Answer: (c).isolation property
Q26.
If a transaction has obtained a __________ lock, it can read but cannot write on the item

a.

Shared mode

b.

Exclusive mode

c.

Read only mode

d.

Write only mode

Discuss
Answer: (a).Shared mode
Q27.
If a transaction has obtained a ________ lock, it can both read and write on the item

a.

Shared mode

b.

Exclusive mode

c.

Read only mode

d.

Write only mode

Discuss
Answer: (b).Exclusive mode
Q28.
A transaction can proceed only after the concurrency control manager ________ the lock to the transaction

a.

Grants

b.

Requests

c.

Allocates

d.

None of the mentioned

Discuss
Answer: (a).Grants
Q29.
If a transaction can be granted a lock on an item immediately in spite of the presence of another mode, then the two modes are said to be ________

a.

Concurrent

b.

Equivalent

c.

Compatible

d.

Executable

Discuss
Answer: (c).Compatible
Q30.
A transaction is made to wait until all ________ locks held on the item are released

a.

Compatible

b.

Incompatible

c.

Concurrent

d.

Equivalent

Discuss
Answer: (a).Compatible
Page 3 of 15

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