LogIn

Email

Password

Show Password

I don't have account.

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

Hash Index

2

B-Tree Index

3

Full-Text Index

4

Bitmap Index

Question 2

Which of the following best describes MySQL?

1

A NoSQL database

2

A key-value store

3

A programming language

4

An open-source relational database management system

Question 3

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

1

InnoDB

2

MEMORY

3

MyISAM

4

CSV

Question 4

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

1

MyISAM

2

CSV

3

MEMORY

4

InnoDB

Question 5

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

1

CSV

2

InnoDB

3

MyISAM

4

MEMORY

Question 6

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

1

MyISAM

2

CSV

3

BLACKHOLE

4

ARCHIVE

Question 7

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

1

BLACKHOLE

2

CSV

3

InnoDB

4

ARCHIVE

Question 8

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

1

MyISAM

2

InnoDB

3

ARCHIVE

4

CSV

Question 9

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

1

ENUM

2

VARCHAR

3

TEXT

4

INT

Question 10

What is the purpose of an index in MySQL?

1

To prevent data duplication

2

To increase storage space

3

To speed up query execution

4

To store data persistently

Question 11

Which of the following helps optimize MySQL queries?

1

Storing duplicate data

2

Adding appropriate indexes

3

Using multiple OR conditions

4

Using SELECT *

Question 12

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

1

BEGIN QUERY

2

OPEN TRANSACTION

3

EXECUTE TRANSACTION

4

START TRANSACTION

Question 13

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

1

Durability

2

Isolation

3

Atomicity

4

Consistency

Question 14

Which command is used to create a new MySQL user?

1

CREATE USER

2

NEW USER

3

ADD USER

4

CREATE NEW USER

Question 15

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

1

UPDATE

2

SELECT

3

INSERT

4

ALTER

Question 16

Which command is used to create a MySQL database backup?

1

mysqldump

2

backupdb

3

create_backup

4

mysqlbackup

Question 17

Which of the following improves MySQL query performance?

1

Disabling indexes

2

Running queries without WHERE

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

DROP

2

TRUNCATE

3

ALTER

4

DELETE

Question 19

Which SQL clause is evaluated after the GROUP BY clause?

1

HAVING

2

WHERE

3

ORDER BY

4

DISTINCT

Question 20

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

1

Table structure will be deleted

2

SQL error will occur

3

All rows will be deleted

4

Only one row will be deleted

Question 21

Which SQL keyword is used to sort the result set?

1

SORT

2

FILTER

3

GROUP BY

4

ORDER BY

Question 22

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

1

COUNT(*)

2

SUM()

3

TOTAL()

4

COUNT(column_name)

Question 23

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

1

ADD COLUMN

2

MODIFY TABLE

3

UPDATE TABLE

4

ALTER TABLE

Question 24

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

1

BETWEEN

2

EXISTS

3

LIKE

4

IN

Question 25

What is the purpose of the EXISTS keyword in SQL?

1

Checks for NULL values

2

Checks if a table exists

3

Verifies column existence

4

Checks if a subquery returns any rows

Question 26

Which SQL statement is used to rename a table?

1

RENAME TABLE

2

CHANGE TABLE

3

MODIFY TABLE

4

ALTER NAME

Question 27

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

1

When improving table indexing

2

When simplifying complex recursive or multi-step queries

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

INNER JOIN

2

CROSS JOIN

3

LEFT JOIN with NULL check

4

FULL JOIN

Question 29

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

1

Bitmap Index

2

Hash Index

3

Full-Text 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

Transactions

4

Triggers