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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

Hash Index

2

Full-Text Index

3

B-Tree Index

4

Bitmap Index

Question 2

Which of the following best describes MySQL?

1

A NoSQL database

2

An open-source relational database management system

3

A programming language

4

A key-value store

Question 3

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

1

MEMORY

2

CSV

3

InnoDB

4

MyISAM

Question 4

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

1

InnoDB

2

MyISAM

3

MEMORY

4

CSV

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

BLACKHOLE

2

CSV

3

ARCHIVE

4

MyISAM

Question 7

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

1

InnoDB

2

BLACKHOLE

3

CSV

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

ARCHIVE

3

CSV

4

InnoDB

Question 9

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

1

INT

2

TEXT

3

ENUM

4

VARCHAR

Question 10

What is the purpose of an index in MySQL?

1

To speed up query execution

2

To store data persistently

3

To prevent data duplication

4

To increase storage space

Question 11

Which of the following helps optimize MySQL queries?

1

Using SELECT *

2

Adding appropriate indexes

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

BEGIN QUERY

4

START TRANSACTION

Question 13

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

1

Consistency

2

Isolation

3

Durability

4

Atomicity

Question 14

Which command is used to create a new MySQL user?

1

NEW USER

2

CREATE NEW USER

3

ADD USER

4

CREATE USER

Question 15

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

1

UPDATE

2

SELECT

3

ALTER

4

INSERT

Question 16

Which command is used to create a MySQL database backup?

1

mysqlbackup

2

backupdb

3

mysqldump

4

create_backup

Question 17

Which of the following improves MySQL query performance?

1

Avoiding normalization

2

Using composite indexes

3

Disabling indexes

4

Running queries without WHERE

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

DISTINCT

2

ORDER BY

3

HAVING

4

WHERE

Question 20

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

1

All rows will be deleted

2

Only one row will be deleted

3

Table structure will be deleted

4

SQL error will occur

Question 21

Which SQL keyword is used to sort the result set?

1

GROUP BY

2

ORDER BY

3

FILTER

4

SORT

Question 22

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

1

COUNT(*)

2

COUNT(column_name)

3

TOTAL()

4

SUM()

Question 23

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

1

ADD COLUMN

2

ALTER TABLE

3

UPDATE TABLE

4

MODIFY TABLE

Question 24

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

1

IN

2

BETWEEN

3

LIKE

4

EXISTS

Question 25

What is the purpose of the EXISTS keyword in SQL?

1

Checks for NULL values

2

Verifies column existence

3

Checks if a table exists

4

Checks if a subquery returns any rows

Question 26

Which SQL statement is used to rename a table?

1

CHANGE TABLE

2

ALTER NAME

3

RENAME TABLE

4

MODIFY 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 permanent storage is required

4

When replacing transactions

Question 28

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

1

FULL JOIN

2

LEFT JOIN with NULL check

3

INNER JOIN

4

CROSS JOIN

Question 29

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

1

Bitmap Index

2

Full-Text Index

3

Hash Index

4

B-Tree Index

Question 30

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

1

Transactions

2

Triggers

3

Views

4

Indexing