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Arrays in C Programming - Objective Type Questions with Answers

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C programming language arrays 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) 

	int warr[3][2][2]={1,2,3,4,5,6,7,8,9,10,11,12};

What will be the value of warr[2][1][0]?

[A] 5
[B] 7
[C] 9
[D] 11

Comment

Answer: Option [D]

Let us identify the arrays for each values.

warr[0][0][0]=1

warr[0][0][1]=2

warr[0][1][0]=3

warr[0][1][1]=4

warr[1][0][0]=5

warr[1][0][1]=6

warr[1][1][0]=7

warr[1][1][1]=8

warr[2][0][0]=9

warr[2][0][1]=10

warr[2][1][0]=11

(2) Given the piece of code 

	int a[50];
	int *pa;
	pa=a;

To access the 6th element of the array which of the following is incorrect?

[A] *(a+5)
[B] a[5]
[C] pa[5]
[D] *(*pa+5)

Comment

Answer: Option [D]

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(3) What will be the output of the following code segment? 
	int a[10]={1,2,3,4,5,6,7,8,9,10};
	*p=a;
	printf("\n%d:%d", p[7], p[a[7]]);
[A] 7:7
[B] 7:8
[C] 8:9
[D] 8:8

Comment

Answer: Option [C]

The first element of the array i.e. a[0] is assigned by *p=a. Therefore a[0]=1. Then p[7]=8 and p[a[7]]=p[8]=9

Hence 8:9

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

	main()
	{
		int a[4]={1,5};
		printf("%d",a[3]);
	}
[A] 0
[B] Syntax error because of improper initialization
[C] 5
[D] Syntax error because of invalid index

Comment

Answer: Option [A]

Given that int a[4]={1,5}

So a[2], a[3] etc. are 0

(5) For the following definition, which of the given option is correct? 

	int a[10];
[A] a++;
[B] a=a+1
[C] *a++
[D] *a[1]

Comment

Answer: Option [C]

*a+0 points to the a[0] location.

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