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C quiz questions with answers - Storage classes MCQs

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C programming language storage classes quiz & multiple choice questions(mcqs) and answers are available to download in PDF for free. These objective type questions with Answers are useful for preparations of competitive exams like CBSE NET, GATE, NIELIT, BCA, B.Sc. MCA, M.Sc. B.Tech, M.Tech, BE, ME etc.
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(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

Comment

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

Comment

Answer: Option [C]

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(3) Which of the following is not a proper storage class in 'C'?
[A] auto
[B] dec
[C] static
[D] extern

Comment

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

Comment

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

Comment

Answer: Option [B]

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