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 2 of 15

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Q11.

Which of the following allows dirty reads, nonrepeatable reads and phantom reads to occur?

Read committed

Read uncommitted

Repeatable read

Serializable

Discuss

Answer: (b).Read uncommitted

Q12.

Which of the following locks the item from access of any type?

Implicit lock

Explicit lock

Exclusive lock

Shared lock

Discuss

Answer: (c).Exclusive lock

Q13.

The size of a lock is called:

implicit lock

lock granularity

exclusive lock

shared lock

Discuss

Answer: (b).lock granularity

Q14.

A cursor type in which the application sees the data as they were at the time the cursor was opened is called:

forward only

static

keyset

dynamic

Discuss

Answer: (b).static

Q15.

Locks placed by the DBMS are called ________ .

implicit locks

explicit locks

exclusive locks

shared locks

Discuss

Answer: (a).implicit locks

Q16.

If an transaction is performed in a database and committed, the changes are taken to the previous state of transaction by

Flashback

Rollback

Both a and b

Cannot be done

Discuss

Answer: (d).Cannot be done

Q17.

When the transaction finishes the final statement the transaction enters into

Active state

Committed state

Partially committed state

Abort state

Discuss

Answer: (c).Partially committed state

Q18.

Which of the following is an atomic sequence of database actions?

Transaction

Concurrency

Relations

All of the mentioned

Discuss

Answer: (a).Transaction

Q19.

DBMS periodically suspends all processing and synchronizes its files and journals through the use of

Checkpoint facility

Backup facility

Recovery manager

Database change log

Discuss

Answer: (a).Checkpoint facility

Q20.

A race condition occurs when

Two concurrent activities interact to cause a processing error

two users of the DBMS are interacting with different files at the same time

both (a) and (b)

All of the above

Discuss

Answer: (a).Two concurrent activities interact to cause a processing error

Page 2 of 15

Welcome to the Concurrency Control MCQs Page

Concurrency Control MCQs | Page 2 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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