Explore topic-wise MCQs in Mysql.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Mysql knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be the output of the following query?
SELECT First_name
FROM Employee
WHERE emp_id != 6;
A. Only those names whose emp_id is equal to 6
B. Only those names whose emp_id is not less than 6
C. Only those names whose emp_id is not equal to 6
D. All of above
E. None of these
Answer» D. All of above
Discussion
2.

What will be the output of the following query?
SELECT *
FROM Employee
WHERE emp_id = NULL;
A. No output
B. Only those columns whose emp_id is NULL
C. Only those columns whose emp_id is not NULL
D. All of above
E. None of these
Answer» B. Only those columns whose emp_id is NULL
Discussion
3.

What will be the output of the following query?
SELECT First_name
FROM Employee
WHERE emp_id != 6 OR emp_id IS NULL;
A. Only those names whose emp_id is not equal to 6
B. Only those names whose emp_id is equal to 6
C. Only those names whose emp_id is not equal to 6 or emp_id with NULL values
D. All of above
E. None of these
Answer» D. All of above
Discussion
4.

What will be the output of the following query?
SELECT * 
FROM Student
WHERE id IS NULL;
A. No output
B. Only those columns whose id is NULL
C. Only those columns whose id is not NULL
D. All of above
E. None of these
Answer» D. All of above
Discussion
5.

What will be the output of the following query?
SELECT *
FROM Student
WHERE id IS NULL;
A. No output
B. Only those columns whose id is NULL
C. Only those columns whose id is not NULL
D. All of above
E. None of these
Answer» C. Only those columns whose id is not NULL
Discussion
6.

What is the meaning of NULL in Mysql?

A. Value undefined
B. Not applicable
C. Value not yet known
D. All of above
E. None of these
Answer» E. None of these
Discussion
7.

Which operator is used to check the expression is not NULL ?

A. NOT NULL
B. ON
C. IS NULL
D. All of above
E. None of these
Answer» B. ON
Discussion
8.

Which operator is used to check whether the expression is NULL ?

A. ON
B. IS NULL
C. NOT NULL
D. All of above
E. None of these
Answer» C. NOT NULL
Discussion