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.

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 1 of 9

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Q1.

Using indexes optimizes query performance.

True

False

May be True or False

Can't say

Discuss

Answer: (a).True

Q2.

The maximum number of indexes on MyISAM table is __________

more than 1

Discuss

Answer: (d).more than 1

Q3.

The data rows of a MyISAM table are stored in __________

data file

index file

log file

error file

Discuss

Answer: (a).data file

Q4.

In a single table (with 10 columns) join query the number of values needed to examine per column is __________

Discuss

Answer: (b).10

Q5.

Suppose tbl_1 is a table consisting of 8 rows and tbl_2 is a table consisting of 6 rows, the number of combinations through which the search is performed is __________

SELECT tbl_1.i1, tbl_2.i2
 FROM tbl_1 INNER JOIN tbl_2
 WHERE tbl_1.i1 = tbl_2.i2;

Discuss

Answer: (d).48

Q6.

How many of the following shared tablespaces is bound by the OS file size limit?

MyISAM, InnoDB, TRANSACTION

Discuss

Answer: (b).1

Q7.

If a column contains 7 values and 6 distinct values, the cardinality is __________

Discuss

Answer: (b).6

Q8.

For a table having 4 columns, the number of columns to which hash function is applied when using hash indexes is __________

Discuss

Answer: (d).4

Q9.

The slow query log can be used to identify queries that may be performing badly.

True

False

May be True or False

Can't say

Discuss

Answer: (a).True

Q10.

The slow query log is written as __________

numbers

text

image

graph

Discuss

Answer: (b).text

Page 1 of 9

Welcome to the Query Optimization MCQs Page

Query Optimization MCQs | Page 1 of 9

Explore more Topics under MySQL Database

MySQL Basics

Managing Data using SQL

MySQL Data Types and Operators

Stored Programs

MySQL Programming

MySQL Administration

Access Control and Security

Database Maintenance and Backup

System and User Variables

MySQL Clauses

Miscellaneous Topics in MySQL

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