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.

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 7 of 15

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Q61.

Read only operations omit the _______ phase

Read phase

Validation phase

Write phase

None of the mentioned

Discuss

Answer: (c).Write phase

Q62.

Which of the following timestamp is used to record the time at which the transaction started execution?

Start(i)

Validation(i)

Finish(i)

Write(i)

Discuss

Answer: (a).Start(i)

Q63.

Which of the following timestamps is used to record the time when a transaction has finished its read phase?

Start(i)

Validation(i)

Finish(i)

Write(i)

Discuss

Answer: (b).Validation(i)

Q64.

Which of the following timestamps is used to record the time when a database has completed its write operation?

Start(i)

Validation(i)

Finish(i)

Write(i)

Discuss

Answer: (c).Finish(i)

Q65.

State true or false: Locking and timestamp ordering force a wait or rollback whenever a conflict is detected.

True

False

May be

Can't say

Discuss

Answer: (a).True

Q66.

State true or false: We determine the serializability order of validation protocol by the validation ordering technique

True

False

May be

Can't say

Discuss

Answer: (b).False

Q67.

In _______ schemes, each write operation creates a new version of Q

Multiversion

Snapshot isolation

Lock based

Timestamp

Discuss

Answer: (a).Multiversion

Q68.

If the first update is overwritten by a second, it is called as a _______ update

Useful

Overlapping

Lost

Concurrent

Discuss

Answer: (c).Lost

Q69.

State true or false: Snapshot isolation prevents lost updates

True

False

May be

Can't say

Discuss

Answer: (a).True

Q70.

Which of the following is a variant of snapshot isolation

First committer wins

First updater wins

More than one of the mentioned

None of the mentioned

Discuss

Answer: (c).More than one of the mentioned

Page 7 of 15

Welcome to the Concurrency Control MCQs Page

Concurrency Control MCQs | Page 7 of 15

Explore more Topics under DBMS

DBMS Basics

Data Models

The Entity Relationship Approach

Relational Databases

Data Storage and Querying

Relational Algebra

Normalization

Storage and File Structures

Indexing and Hashing

Transactions

Recovery System

Distributed Databases

SQL

Data Warehousing and Data Mining

RDBMS

Advanced SQL

SQL Queries,Constraints and Triggers

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