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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 6 of 9

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Q51.
Accessing data from which of these is faster?

memory, disk

a.

memory

b.

disk

c.

same speed

d.

machine dependent

Discuss
Answer: (a).memory
Q52.
Which system variable controls the size of the table cache?

a.

table_cache

b.

cache_table

c.

open_cache

d.

cache_open

Discuss
Answer: (a).table_cache
Q53.
Which status indicator assesses how effective the table cache is?

a.

Open_tables

b.

Opened_tables

c.

Close_tables

d.

Closed_tables

Discuss
Answer: (b).Opened_tables
Q54.
In MySQL, the default size of the key buffer in MB is _________________

a.

4

b.

8

c.

16

d.

32

Discuss
Answer: (b).8
Q55.
The system variable to maintain InnoDB log buffer size is _________________

a.

innodb_log_buffer_size

b.

innodb_buffer_log_size

c.

buffer_log_innodb_size

d.

log_buffer_innodb_size

Discuss
Answer: (a).innodb_log_buffer_size
Q56.
All queries can be cached.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q57.
To determine whether query cache is supported by the server the variable is _________________

a.

have_query_cache

b.

have_cache_query

c.

query_cache_have

d.

cache_query_have

Discuss
Answer: (a).have_query_cache
Q58.
Which mode tells not to cache query results?

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (a).0
Q59.
Which mode tells cache queries that begin with SELECT SQL_CACHE?

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (c).2
Q60.
Installing more memory into the machine enables to configure larger values for cache server.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Page 6 of 9

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