C Programming - MCQ Quiz

Which of the following is a header file in C?

• stdio.c

• conio.h

• main.h

• program.c

The header file stdio.h mainly deals with:

• String manipulation

• Standard input/output

• Mathematical functions

• File handling only

Which header file is required for mathematical functions like sqrt()?

• math.h

• stdio.h

• string.h

• conio.h

Which of the following is a valid variable name in C?

• 1number

• _value

• float

• long-int

Which statement is true about identifiers?

• Identifiers can start with a number.

• Identifiers can contain spaces.

• Identifiers are case-sensitive.

• Keywords can be used as identifiers.

Which of the following is an invalid variable declaration?

• int age;

• float marks;

• char name[20];

• double 2value;

Which function is used for formatted output in C?

• printf()

• scanf()

• gets()

• puts()

What is the correct format specifier for a float in printf()?

• %d

• %f

• %c

• %s

Which function is used for reading a single character from user?

• scanf()

• getchar()

• gets()

• putchar()

The ASCII value of character 'A' is:

• 65

• 97

• 66

• 64