Aptitude Test On C-programming (Pointers And Strings) Set -c
15 Questions
| Attempts: 1078
Questions and Answers
- 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
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