C Programming Quiz

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

• 1var

• var_1

• var-1

• int

Which of the following is not a valid identifier?

• _main

• main_

• 3main

• main3

Which keyword is used to declare a variable in C?

• variable

• define

• int

• var

What will be the default value of a local variable in C if not initialized?

• 0

• Garbage value

• NULL

• Compilation error

Which is the correct way to declare multiple variables of the same type?

• int a, b, c;

• int a = b = c = 0;

• int a; b; c;

• declare int a, b, c;

What is the size of int data type in most 32-bit C compilers?

• 2 bytes

• 4 bytes

• 8 bytes

• Depends on the system

Which data type is used to store a single character in C?

• char

• string

• character

• int

Which of the following is a floating-point data type?

• float

• double

• long double

• All of the above

What is the correct format specifier for double?

• %f

• %lf

• %d

• %ld

Which keyword is used for defining constants?

• constant

• const

• define

• fixed