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- Question
Which of the following function is correct that finds the length of a string?
Options- A.
int xstrlen(char *s) { int length=0; while(*s!='\0') { length++; s++; } return (length); } - B.
int xstrlen(char s) { int length=0; while(*s!='\0') length++; s++; return (length); } - C.
int xstrlen(char *s) { int length=0; while(*s!='\0') length++; return (length); } - D.
int xstrlen(char *s) { int length=0; while(*s!='\0') s++; return (length); } - Correct Answer
int xstrlen(char *s) { int length=0; while(*s!='\0') { length++; s++; } return (length); }
ExplanationOption A is the correct function to find the length of given string.Example:
#include<stdio.h> int xstrlen(char *s) { int length=0; while(*s!='\0') { length++; s++; } return (length); } int main() { char d[] = "CuriousTab"; printf("Length = %d\n", xstrlen(d)); return 0; }Output: Length = 8
More questions
- 1. What will be the output of the program (in Turbo C under DOS)?
#include<stdio.h> int main() { char huge *near *far *ptr1; char near *far *huge *ptr2; char far *huge *near *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }
Options- A. 4, 4, 8
- B. 2, 4, 4
- C. 4, 4, 2
- D. 2, 4, 8 Discuss
Correct Answer: 4, 4, 2
- 2. What will be the output of the program in 16-bit platform (under DOS)?
#include<stdio.h> int main() { struct node { int data; struct node *link; }; struct node *p, *q; p = (struct node *) malloc(sizeof(struct node)); q = (struct node *) malloc(sizeof(struct node)); printf("%d, %d\n", sizeof(p), sizeof(q)); return 0; }
Options- A. 2, 2
- B. 8, 8
- C. 5, 5
- D. 4, 4 Discuss
Correct Answer: 2, 2
- 3. Is it true that too many recursive calls may result into stack overflow?
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
Explanation:
Yes, too many recursive calls may result into stack overflow. because when a function is called its return address is stored in stack.After sometime the stack memory will be filled completely. Hence stack overflow error will occur.
- 4. The operator used to get value at address stored in a pointer variable is
Options- A. *
- B. &
- C. &&
- D. || Discuss
Correct Answer: *
- 5. If the size of integer is 4bytes, What will be the output of the program?
#include<stdio.h> int main() { int arr[] = {12, 13, 14, 15, 16}; printf("%d, %d, %d\n", sizeof(arr), sizeof(*arr), sizeof(arr[0])); return 0; }
Options- A. 10, 2, 4
- B. 20, 4, 4
- C. 16, 2, 2
- D. 20, 2, 2 Discuss
Correct Answer: 20, 4, 4
- 6. What do the following declaration signify?
void *cmp();
Options- A. cmp is a pointer to an void type.
- B. cmp is a void type pointer variable.
- C. cmp is a function that return a void pointer.
- D. cmp function returns nothing. Discuss
Correct Answer: cmp is a function that return a void pointer.
- 7. A function may have any number of return statements each returning different values.
Options- A. True
- B. False Discuss
Correct Answer: True
Explanation:
True, A function may have any number of return statements each returning different values and each return statements will not occur successively.- 8. In C all functions except main() can be called recursively.
Options- A. True
- B. False Discuss
Correct Answer: False
Explanation:
Any function including main() can be called recursively.- 9. Input/output function prototypes and macros are defined in which header file?
Options- A. conio.h
- B. stdlib.h
- C. stdio.h
- D. dos.h Discuss
Correct Answer: stdio.h
Explanation:
stdio.h, which stands for "standard input/output header", is the header in the C standard library that contains macro definitions, constants, and declarations of functions and types used for various standard input and output operations.- 10. For a function receives variable number of arguments it is necessary that the function should receive at least one fixed argument.
Options- A. True
- B. False Discuss
Correct Answer: True
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- 1. What will be the output of the program (in Turbo C under DOS)?
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