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Practice mysql Quizzes

Boost your knowledge of mysql with DevBrainiac's interactive quizzes that make learning faster and more effective. Each quiz focuses on real-world concepts, helping you improve accuracy, understand fundamentals and prepare better for technical interviews. Suitable for beginners and professionals alike, our mysql quizzes offer a focused, practical approach to mastering the topic.

Explore All mysql Quizzes

Learn mysql step by step with interactive quizzes designed for beginners and learners revising key concepts. Build a strong foundation with clear, structured practice in mysql.

Question 1

Which index type does MySQL use by default for primary keys?

1

B-Tree Index

2

Bitmap Index

3

Hash Index

4

Full-Text Index

Question 2

Which of the following best describes MySQL?

1

An open-source relational database management system

2

A NoSQL database

3

A key-value store

4

A programming language

Question 3

Which of the following is the default storage engine in MySQL 8.0?

1

MyISAM

2

InnoDB

3

CSV

4

MEMORY

Question 4

Which MySQL storage engine is best suited for high-speed, read-heavy workloads but does not support transactions?

1

InnoDB

2

CSV

3

MyISAM

4

MEMORY

Question 5

Which MySQL storage engine is designed for in-memory operations and does not persist data to disk?

1

MyISAM

2

CSV

3

MEMORY

4

InnoDB

Question 6

Which MySQL storage engine is best for logging and large-scale data archiving with high compression?

1

BLACKHOLE

2

ARCHIVE

3

CSV

4

MyISAM

Question 7

Which MySQL storage engine does NOT store any data and acts as a data sink?

1

ARCHIVE

2

InnoDB

3

CSV

4

BLACKHOLE

Question 8

Which MySQL storage engine stores table data in a plain text file and is useful for data exchange?

1

ARCHIVE

2

CSV

3

MyISAM

4

InnoDB

Question 9

Which data type is best suited for storing large text data in MySQL?

1

VARCHAR

2

TEXT

3

INT

4

ENUM

Question 10

What is the purpose of an index in MySQL?

1

To increase storage space

2

To prevent data duplication

3

To store data persistently

4

To speed up query execution

Question 11

Which of the following helps optimize MySQL queries?

1

Adding appropriate indexes

2

Using SELECT *

3

Storing duplicate data

4

Using multiple OR conditions

Question 12

Which SQL command is used to start a transaction in MySQL?

1

OPEN TRANSACTION

2

EXECUTE TRANSACTION

3

START TRANSACTION

4

BEGIN QUERY

Question 13

Which of the following ACID properties ensures that a transaction is executed completely or not at all?

1

Atomicity

2

Durability

3

Isolation

4

Consistency

Question 14

Which command is used to create a new MySQL user?

1

CREATE USER

2

ADD USER

3

CREATE NEW USER

4

NEW USER

Question 15

Which MySQL privilege allows a user to modify the database structure?

1

SELECT

2

UPDATE

3

ALTER

4

INSERT

Question 16

Which command is used to create a MySQL database backup?

1

mysqldump

2

create_backup

3

backupdb

4

mysqlbackup

Question 17

Which of the following improves MySQL query performance?

1

Running queries without WHERE

2

Disabling indexes

3

Avoiding normalization

4

Using composite indexes

Question 18

Which of the following SQL commands is used to remove all records from a table but keep its structure?

1

ALTER

2

DROP

3

DELETE

4

TRUNCATE

Question 19

Which SQL clause is evaluated after the GROUP BY clause?

1

ORDER BY

2

DISTINCT

3

HAVING

4

WHERE

Question 20

What will happen if you use DELETE without a WHERE clause?

1

SQL error will occur

2

All rows will be deleted

3

Only one row will be deleted

4

Table structure will be deleted

Question 21

Which SQL keyword is used to sort the result set?

1

FILTER

2

GROUP BY

3

SORT

4

ORDER BY

Question 22

Which SQL function returns the total number of rows, including NULL values?

1

SUM()

2

COUNT(column_name)

3

COUNT(*)

4

TOTAL()

Question 23

Which SQL statement is used to add a new column to an existing table?

1

MODIFY TABLE

2

ADD COLUMN

3

ALTER TABLE

4

UPDATE TABLE

Question 24

Which SQL operator is used to search for a specified pattern?

1

EXISTS

2

LIKE

3

IN

4

BETWEEN

Question 25

What is the purpose of the EXISTS keyword in SQL?

1

Verifies column existence

2

Checks for NULL values

3

Checks if a subquery returns any rows

4

Checks if a table exists

Question 26

Which SQL statement is used to rename a table?

1

MODIFY TABLE

2

ALTER NAME

3

RENAME TABLE

4

CHANGE TABLE

Question 27

Which scenario is most suitable for using a CTE (Common Table Expression)?

1

When simplifying complex recursive or multi-step queries

2

When improving table indexing

3

When replacing transactions

4

When permanent storage is required

Question 28

Which SQL join can be used to find records that exist in one table but not in another?

1

LEFT JOIN with NULL check

2

INNER JOIN

3

FULL JOIN

4

CROSS JOIN

Question 29

Which index type is most effective for columns with low cardinality?

1

Full-Text Index

2

Bitmap Index

3

Hash Index

4

B-Tree Index

Question 30

Which SQL feature ensures data consistency when multiple users access the database concurrently?

1

Indexing

2

Views

3

Triggers

4

Transactions