Storage Classes - C programming quiz questions and answers

(1) Regarding the scope of the variables identify the incorrect statement:

[A] Automatic variables are automatically initialized to 0

[B] Static variables are automatically initialized to 0

[C] The address of a register variable is not accessible

[D] Static variables cannot be initialized with any expression

Answer: Option [A]

By default Automatic variables are initialized to Garbage value.

(2) What will be the output of the following code segment?

	void fn()
	{
		static int i=10;
		printf("%d",++i);
	}
	main()
	{
		fn();
		fn();
	}

[A] 10 10

[B] 11 11

[C] 11 12

[D] 12 12

Answer: Option [C]

(3) Which of the following is not a proper storage class in 'C'?

[A] auto

[B] dec

[C] static

[D] extern

Answer: Option [B]

The storage classes in C are auto, extern, static and global. dec is not a storage class.

(4) What is the output of the following code?

	main()
	{
		static int num=8;
		printf("%d",num=num-2);
		if(num!=0)
		main();
	}

[A] 8 6 4 2

[B] Infinite output

[C] 6 4 2 0

[D] invalid because main function cannot call itself

Answer: Option [C]

(5) Value of static storage variable

[A] changes during different function calls

[B] persists between different function calls

[C] increases during different function calls

[D] decreases during different function calls

Answer: Option [B]

C quiz questions with answers - Storage classes MCQs