C Programming Questions and Answers – Arrays of Structures – 2

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This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Arrays of Structures – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

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1. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     };
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         struct point p1[]  =  {1, 2, 3, 4};
  11.         foo(p1);
  12.     }
  13.     void foo(struct point p[])
  14.     {
  15.         printf("%d\n", p[1].x);
  16.     }

a) Compile time error
b) 3
c) 2
d) 1
View Answer

Answer: b
Explanation: None.
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2. What will be the output of the following C code?

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  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     };
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         struct point p1[] = {1, 2, 3, 4};
  11.         foo(p1);
  12.     }
  13.     void foo(struct point p[])
  14.     {
  15.         printf("%d\n", p->x);
  16.     }

a) 1
b) 2
c) 3
d) Compile time error
View Answer

Answer: a
Explanation: None.
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3. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     };
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         struct point p1[] = {1, 2, 3, 4};
  11.         foo(p1);
  12.     }
  13.     void foo(struct point p[])
  14.     {
  15.         printf("%d %d\n", p->x, ++p->x);
  16.     }

a) 1 2
b) 2 2
c) Compile time error
d) Undefined behaviour
View Answer

Answer: b
Explanation: None.
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4. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     } p[] = {1, 2, 3, 4, 5};
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         foo(p);
  11.     }
  12.     void foo(struct point p[])
  13.     {
  14.         printf("%d %d\n", p->x, p[2].y);
  15.     }

a) 1 0
b) Compile time error
c) 1 somegarbagevalue
d) Undefined behaviour
View Answer

Answer: a
Explanation: None.

5. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     };
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         struct point p1[] = {1, 2, 3, 4, 5};
  11.         foo(p1);
  12.     }
  13.     void foo(struct point p[])
  14.     {
  15.         printf("%d %d\n", p->x, p[3].y);
  16.     }

a) Compile time error
b) 1 0
c) 1 somegarbagevalue
d) None of the mentioned
View Answer

Answer: c
Explanation: None.

6. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     };
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         struct point p1[] = {1, 2, 3, 4, 5};
  11.         foo(p1);
  12.     }
  13.     void foo(struct point p[])
  14.     {
  15.         printf("%d %d\n", p->x, (p + 2).y);
  16.     }

a) Compile time error
b) 1 0
c) 1 somegarbagevalue
d) Undefined behaviour
View Answer

Answer: a
Explanation: None.

7. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct point
  3.     {
  4.         int x;
  5.         int y;
  6.     };
  7.     void foo(struct point*);
  8.     int main()
  9.     {
  10.         struct point p1[] = {1, 2, 3, 4, 5};
  11.         foo(p1);
  12.     }
  13.     void foo(struct point p[])
  14.     {
  15.         printf("%d %d\n", p->x, (p + 2)->y);
  16.     }

a) Compile time error
b) 1 0
c) 1 somegarbagevalue
d) undefined behaviour
View Answer

Answer: b
Explanation: None.

8. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     struct student
  3.     {
  4.         char *c;
  5.     };
  6.     void main()
  7.     {
  8.         struct student s[2];
  9.         printf("%d", sizeof(s));
  10.     }

a) 2
b) 4
c) 16
d) 8
View Answer

Answer: d
Explanation: None.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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