C Programming Quiz

Which of the following is a correct declaration of an integer variable in C?

• int 1x

• int x1

• float x1

• char x1

What is the size of an int data type in C (assuming a 32-bit system)?

• 2 bytes

• 4 bytes

• 8 bytes

• 1 byte

Which data type would you use to store a single character?

• int

• float

• char

• double

What is the correct syntax to declare a constant variable in C?

• constant int x = 10

• int const x = 10

• const int x = 10

• b and c

What is the output of the following code? printf("%d", sizeof(char));

• 4

• 2

• 1

• 8

Which of the following is not a valid variable name in C?

• var1

• _var

• 1var

• var_1

What is the default value of an uninitialized local variable in C?

• 0

• NULL

• Garbage value

• -1

Which keyword is used to declare a variable that cannot be changed?

• const

• static

• volatile

• extern

How do you properly comment a single line in C?

• /* comment */

• ** comment **

• // comment

• # comment

What will be the output of the following code? int x = 10; printf("%d", x++);

• 11

• 9

• 10

• Error