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Pointers And Arrays - Questions and Answers

 

Practice these Pointers And Arrays under C Programming walk-in interview Questions/ examination questions with best tricks and short cuts with solution. Student (candidate) who want to crack the walk in interview, competitive exams and want to find short cuts and tricks to solve questions on Pointers And Arrays for following purpose.


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Here is list of Questions and Answers covering all key area of  Pointers And Arrays topic of C Programming:

 

1.

What is the output of the code given below?

  1.     #include <stdio.h>
  2.     void foo( int[] );
  3.     int main()
  4.     {
  5.         int ary[4] = {1, 2, 3, 4};
  6.         foo(ary);
  7.         printf("%d ", ary[0]);
  8.     }
  9.     void foo(int p[4])
  10.     {
  11.         int i = 10;
  12.         p = &i;
  13.         printf("%d ", p[0]);
  14.     }

Answer: Option B

Explanation:

2.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         char *s = "hello";
  5.         char *p = s;
  6.         printf("%p\t%p", p, s);
  7.     }

Answer: Option C

Explanation:

3.

Comment on an array of void data type:

Answer: Option A

Explanation:

4.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         char *s= "hello";
  5.         char *p = s;
  6.         printf("%c\t%c", 1[p], s[1]);
  7.     }

Answer: Option B

Explanation:

5.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         char *s= "hello";
  5.         char *p = s;
  6.         printf("%c\t%c", p[0], s[1]);
  7.     }

Answer: Option B

Explanation:

6.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         int a[3] = {1, 2, 3};
  5.         int *p = a;
  6.         printf("%p\t%p", p, a);
  7.     }

Answer: Option D

Explanation:

7.

The elements in the array of the following code are
    int array[5] = {5};

Answer: Option C

Explanation:

8.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int ary[4] = {1, 2, 3, 4};
  5.         printf("%d\n", *ary);
  6.     }

Answer: Option D

Explanation:

9.

What is the output of the code given below?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int ary[4] = {1, 2, 3, 4};
  5.         int *p = ary + 3;
  6.         printf("%d\n", p[-2]);
  7.     }

Answer: Option C

Explanation:

10.

An array of similar data types which themselves are collection of dissimilar data type are

Answer: Option B

Explanation:

11.

Different ways to initialize an array with all elements as zero are

Answer: Option D

Explanation:

12.

What is the output of the code given below?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int ary[4] = {1, 2, 3, 4};
  5.         int p[4];
  6.         p = ary;
  7.         printf("%d\n", p[1]);
  8.     }

Answer: Option C

Explanation:

13.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         const int ary[4] = {1, 2, 3, 4};
  5.         int *p;
  6.         p = ary + 3;
  7.         *p = 5;
  8.         printf("%d\n", ary[3]);
  9.     }

Answer: Option C

Explanation:

14.

What is the output of the code given below?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int ary[4] = {1, 2, 3, 4};
  5.         int *p = ary + 3;
  6.         printf("%d %d\n", p[-2], ary[*p]);
  7.     }

Answer: Option A

Explanation:

15.

What is the output of this C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         char *s= "hello";
  5.         char *p = s;
  6.         printf("%c\t%c", *(p + 3),  s[1]);
  7.     }

Answer: Option A

Explanation: