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 8 of 9

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Q71.

Which compiler is used to execute the structured query language?

DCL

DDL

DML

None of the mentioned

Discuss

Answer: (c).DML

Q72.

Which among the following tags belong to Data definition language?

SELECT

FROM

WHERE

All of the mentioned

Discuss

Answer: (d).All of the mentioned

Q73.

Which among the following tags belong to Data Manipulation language?

UPDATE

ALTER

MODIFY

All of the mentioned

Discuss

Answer: (d).All of the mentioned

Q74.

Query Mechanism performs the following functions?

Syntax correction

Checking permission for executing the query

Checking permission for accessing the desired data

All of the mentioned

Discuss

Answer: (d).All of the mentioned

Q75.

What jobs “Query Optimizer” perform in Mysql?

Determine the efficient way to execute a query

Syntax errors

Permissions

All of the mentioned

Discuss

Answer: (a).Determine the efficient way to execute a query

Q76.

What is the meaning of “EMPTY SET” in the following MySQL command?

SELECT fname, lname, person_id
FROM person
WHERE lname=’s’;
/* after Execution*/ Mysql tool RETURN EMPTY SET 0:00sec

No values

Error

Access denied

None of the mentioned

Discuss

Answer: (a).No values

Q77.

Which are the two languages used in Mysql?

DML/DDL

DDL/DCL

DML/DDM

None of the mentioned

Discuss

Answer: (a).DML/DDL

Q78.

The users responsible for query processing in database system are ___________

Native users

Application programmers

Sophisticated users

Specialized users

Discuss

Answer: (c).Sophisticated users

Q79.

Select the sequence for how the query mechanism works?

Authentication-> DDL->DML->query optimizer->output

DDL->DML->query optimizer-> Authentication->output

DML->query optimizer-> Authentication-> DDL-> output

All of the mentioned

Discuss

Answer: (a).Authentication-> DDL->DML->query optimizer->output

Q80.

Which clause is used to determine “which column to include in the query sets”?

SELECT

FROM

WHERE

ORDER BY

Discuss

Answer: (a).SELECT

Page 8 of 9

Welcome to the Query Optimization MCQs Page

Query Optimization MCQs | Page 8 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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