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Welcome to the Query Optimization MCQs Page

Dive deep into the fascinating world of Query Optimization with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Query Optimization, a crucial aspect of MySQL Database. In this section, you will encounter a diverse range of MCQs that cover various aspects of Query Optimization, 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 MySQL Database.

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Check out the MCQs below to embark on an enriching journey through Query Optimization. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of MySQL Database.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Query Optimization. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Query Optimization MCQs | Page 5 of 9

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Q41.
Which of these has higher priority?

writes, reads

a.

writes

b.

reads

c.

same priority

d.

machine dependent

Discuss
Answer: (a).writes
Q42.
How many of the following implement the default scheduling property of MySQL?

MyISAM, MERGE, MEMORY

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (d).3
Q43.
Which statement issues a lock on tables?

a.

ISSUE LOCK

b.

LOCK ISSUE

c.

LOCK TABLES

d.

ISSUE LOCKS

Discuss
Answer: (c).LOCK TABLES
Q44.
Reading from a table does not change it.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q45.
To how many of these does the LOW_PRIORITY modifier apply to?

DELETE, INSERT, LOAD DATA, REPLACE

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (d).4
Q46.
The number of tables among the following for which HIGH_PRIORITY have an effect are _________________

MyISAM, MEMORY, MERGE

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (d).3
Q47.
The number of tables for which DELAYED works is _________________

MyISAM, MEMORY, ARCHIVE, BLACKHOLE

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (d).4
Q48.
Find the odd one out in terms of scheduling policies.

a.

MyISAM

b.

InnoDB

c.

MEMORY

d.

MERGE

Discuss
Answer: (b).InnoDB
Q49.
The use of table level locks is always useful in MyISAM tables.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q50.
Which table is preferred when there are many updates?

a.

MyISAM

b.

InnoDB

c.

MEMORY

d.

MERGE

Discuss
Answer: (b).InnoDB
Page 5 of 9

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