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Welcome to the Transactions MCQs Page

Dive deep into the fascinating world of Transactions with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Transactions, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Transactions, 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 Transactions. 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 Transactions. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Transactions MCQs | Page 2 of 15

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Q11.
The deadlock in a set of transaction can be determined by

a.

Read-only graph

b.

Wait graph

c.

Wait-for graph

d.

All of the mentioned

Discuss
Answer: (a).Read-only graph
Q12.
A deadlock exists in the system if and only if the wait-for graph contains a ___________.

a.

Cycle

b.

Direction

c.

Bi-direction

d.

Rotation

Discuss
Answer: (a).Cycle
Q13.
Selecting the victim to be rollbacked to the previous state is determined by the minimum cost. The factors determining cost of rollback is

a.

How long the transaction has computed, and how much longer the transaction will compute before it completes its designated task.

b.

How many data items the transaction has used.

c.

How many more data items the transaction needs for it to complete and how many transactions will be involved in the rollback.

d.

All of the above

Discuss
Answer: (d).All of the above
Q14.
__________ rollback requires the system to maintain additional information about the state of all the running transactions.

a.

Total

b.

Partial

c.

Time

d.

Commit

Discuss
Answer: (b).Partial
Q15.
Which of these is data type long literal?

a.

0x99fffL

b.

ABCDEFG

c.

0x99fffa

d.

99671246

Discuss
Answer: (a).0x99fffL
Q16.
Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?

a.

Nonrepeatable read

b.

Phantom read

c.

Dirty read

d.

Consistent read

Discuss
Answer: (b).Phantom read
Q17.
A transaction for which all committed changes are permanent is called:

a.

atomic

b.

consistent

c.

isolated

d.

durable

Discuss
Answer: (d).durable
Q18.
In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.

a.

Read committed

b.

Read uncommitted

c.

Repeatable read

d.

Serializable

Discuss
Answer: (a).Read committed
Q19.
Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?

a.

Nonrepeatable read

b.

Phantom read

c.

Dirty read

d.

Consistent read

Discuss
Answer: (a).Nonrepeatable read
Q20.
A transaction may not always complete its execution successfully. Such a transaction is termed

a.

Aborted

b.

Terminated

c.

Closed

d.

All of the mentioned

Discuss
Answer: (a).Aborted
Page 2 of 15

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