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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 14 of 15

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Q131.
Instead of locking index leaf nodes in a two-phase manner, some index concurrency-control schemes use ___________ on individual key values, allowing other key values to be inserted or deleted from the same leaf.

a.

B+ tree locking

b.

Link level locking

c.

Key-value locking

d.

Next value locking

Discuss
Answer: (c).Key-value locking
Q132.
The recovery scheme must also provide

a.

High availability

b.

Low availability

c.

High reliability

d.

High durability

Discuss
Answer: (a).High availability
Q133.
Which one of the following is a failure to system

a.

Boot crash

b.

Read failure

c.

Transaction failure

d.

All of the mentioned

Discuss
Answer: (c).Transaction failure
Q134.
Which of the following belongs to transaction failure

a.

Read error

b.

Boot error

c.

Logical error

d.

All of the mentioned

Discuss
Answer: (c).Logical error
Q135.
The system has entered an undesirable state (for example, deadlock), as a result of which a transaction cannot continue with its normal execution. This is

a.

Read error

b.

Boot error

c.

Logical error

d.

System error

Discuss
Answer: (c).Logical error
Q136.
The transaction can no longer continue with its normal execution because of some internal condition, such as bad input, data not found, overflow, or resource limit exceeded. This is

a.

Read error

b.

Boot error

c.

Logical error

d.

System error

Discuss
Answer: (c).Logical error
Q137.
The assumption that hardware errors and bugs in the software bring the system to a halt, but do not corrupt the nonvolatile storage contents, is known as the

a.

Stop assumption

b.

Fail assumption

c.

Halt assumption

d.

Fail-stop assumption

Discuss
Answer: (d).Fail-stop assumption
Q138.
Which kind of failure loses its data in head crash or failure during transfer operation.

a.

Transaction failure

b.

System crash

c.

Disk failure

d.

All of the mentioned

Discuss
Answer: (c).Disk failure
Q139.
The failure occurred sufficiently early during the transfer that the destination block remains intact.

a.

Partial Failure

b.

Total failure

c.

Successful completion

d.

Data transfer failure

Discuss
Answer: (a).Partial Failure
Q140.
The database is partitioned into fixed-length storage units called

a.

Parts

b.

Blocks

c.

Reads

d.

Build

Discuss
Answer: (b).Blocks
Page 14 of 15

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