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 1 of 15

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Q1.

Locks placed by command are called ________ .

implicit locks

explicit locks

exclusive locks

shared locks

Discuss

Answer: (b).explicit locks

Q2.

Which of the following locks the item from change but not from read?

Implicit lock

Explicit lock

Exclusive lock

Shared lock

Discuss

Answer: (d).Shared lock

Q3.

The advantage of optimistic locking is that:

the lock is obtained only after the transaction has processed.

the lock is obtained before the transaction has processed.

the lock never needs to be obtained.

transactions that are best suited are those with a lot of activity.

Discuss

Answer: (a).the lock is obtained only after the transaction has processed.

Q4.

Which of the following refers to a cursor type that when the cursor is opened, a primary key value is saved for each row in the recordset; when the application accesses a row, the key is used to fetch the current values of the row?

Forward only

Static

Keyset

Dynamic

Discuss

Answer: (c).Keyset

Q5.

Which of the following refers to a cursor type where changes of any type and from any source are visible?

Forward only

Static

Keyset

Dynamic

Discuss

Answer: (d).Dynamic

Q6.

Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads?

Read committed

Read uncommitted

Repeatable read

Serializable

Discuss

Answer: (c).Repeatable read

Q7.

Dirty read, nonrepeatable, and phantom reads are not possible in this instance.

Read committed

Read uncommitted

Repeatable read

Serializable

Discuss

Answer: (d).Serializable

Q8.

A transaction in which either all of the database actions occur or none of them do is called:

atomic

consistent

isolated

durable

Discuss

Answer: (a).atomic

Q9.

A cursor type in which the application can only move forward through the recordset is called:

forward only

static

keyset

dynamic

Discuss

Answer: (a).forward only

Q10.

Which of the following occurs when one transaction reads a changed record that has not been committed to the database?

Nonrepeatable read

Phantom read

Dirty read

Consistent read

Discuss

Answer: (c).Dirty read

Page 1 of 15

Welcome to the Concurrency Control MCQs Page

Concurrency Control MCQs | Page 1 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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