Aptitude Test On C-programming (Pointers And Strings) Set -c

15 Questions | By Mayurkothawade | Last updated: Mar 16, 2022 | Total Attempts: 1026

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1.

If a variable is a pointer to a structure, then which of the following operator is used to access data members of the structure through the pointer variable?
- A.
  
  '.'
- B.
  
  '&'
- C.
  
  '*'
- D.
  
  '->'
2.

What will be the output of the program ? int main() { inti=3, *j, k; j = &i; printf("%d\n", i**j*i+*j); return0; }
- A.
  
  30
- B.
  
  27
- C.
  
  9
- D.
  
  3
3.

What will be the output of the program ? int main() { void *vp; char ch=74, *cp="JACK"; int j=65; vp=&ch; printf("%c", *(char*)vp); vp=&j; printf("%c", *(int*)vp); vp=cp; printf("%s", (char*)vp+2); return 0; }
- A.
  
  JACK
- B.
  
  JCK
- C.
  
  J65K
- D.
  
  JAK
4.

What will be the output of the program ? int main() { inti, a[] = {2, 4, 6, 8, 10}; change(a, 5); for(i=0; i<=4; i++) printf("%d, ", a[i]); return 0; } change(int *b, int n) { int i; for(i=0; i<n; i++) *(b+1) = *(b+i)+5; }
- A.
  
  7, 9, 11, 13, 15
- B.
  
  2, 4, 6, 8, 10
- C.
  
  3, 1, -1, -3, -5
- D.
  
  2, 15, 6, 8, 10
5.

What will be the output of the program ? int main() { char *str; str = "%s"; printf(str, "K\n"); return 0; }
- A.
  
  Error
- B.
  
  K
- C.
  
  No Output
- D.
  
  %s
6.

Which of the following function is used to find the first occurrence of a given string in another string?
- A.
  
  Strchr()
- B.
  
  Strrchr()
- C.
  
  Strstr()
- D.
  
  Strnset()
7.

What will be the output of the program ? int main() { char p[] = "%d\n"; p[1] = 'c'; printf(p, 65); return 0; }
- A.
  
  A
- B.
  
  A
- C.
  
  65
- D.
  
  C
8.

Trace the output. int main() { char str[] = "basic"; char *s = str; printf("%s ", s++ +3); printf("%s",s); return 0; }
- A.
  
  C c
- B.
  
  Ic asic
- C.
  
  Asic sic
- D.
  
  C basic
9.

What would be the equivalent pointer expression for referring the array element a[i][j][k][l]
- A.
  
  ((((a+i)+j)+k)+l)
- B.
  
  (((a+i)+j)+k+l)
- C.
  
  *(*(*(*(a+i)+j)+k)+l)
- D.
  
  *((a+i)+j+k+l)
10.

What will be the output of the program ? int main() { int i; char a[] = "\0"; if(printf("%s", a)) printf("The string is empty\n"); else printf("The string is not empty\n"); return 0; }
- A.
  
  The string is empty
- B.
  
  The string is not empty
- C.
  
  No output
- D.
  
  0
11.

Are the expression *ptr++ and ++*ptr are same?
- A.
  
  True
- B.
  
  False
12.

If the size of integer is 4bytes, What will be the output of the program? int main() { int arr[] = {12, 13, 14, 15, 16}; printf("%d, %d, %d\n", sizeof(arr), sizeof(*arr), sizeof(arr[0])); return 0; }
- A.
  
  10, 2, 4
- B.
  
  20, 2, 2
- C.
  
  20, 4, 4
- D.
  
  16, 2, 2
13.

What will be the output of the program ? int main() { char str[] = "India\0\is Best\0"; printf("%d\n", strlen(str)); return 0; }
- A.
  
  10
- B.
  
  6
- C.
  
  5
- D.
  
  11
14.

What will be the output of the program ? int main() { printf(5+"Good Morning\n"); return 0; }
- A.
  
  M
- B.
  
  Morning
- C.
  
  Good Morning
- D.
  
  Good
15.

What will be the output of the program ? int main() { char str1[] = "Hello"; char str2[] = "Hello"; if(str1 == str2) printf("Equal\n"); else printf("Unequal\n"); return 0; }
- A.
  
  Equal
- B.
  
  Error
- C.
  
  Unequal
- D.
  
  None of above