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- Question
Which statement will you add in the following program to work it correctly?
#include<stdio.h> int main() { printf("%f\n", log(36.0)); return 0; }
Options- A. #include<conio.h>
- B. #include<math.h>
- C. #include<stdlib.h>
- D. #include<dos.h>
- Correct Answer
- #include<math.h>
Explanationmath.h is a header file in the standard library of C programming language designed for basic mathematical operations.Declaration syntax: double log(double);
More questions
- 1. What will be the output of the program if value 25 given to scanf()?
#include<stdio.h> int main() { int i; printf("%d\n", scanf("%d", &i)); return 0; }
Options- A. 25
- B. 2
- C. 1
- D. 5 Discuss
Correct Answer: 1
Explanation:
The scanf function returns the number of input is given.printf("%d\n", scanf("%d", &i)); The scanf function returns the value 1(one).
Therefore, the output of the program is '1'.
- 2. In the statement expression1 >> expression2. if expression1 is a signed integer with its leftmost bit set to 1 then on right shifting it the result of the statement will vary from computer to computer
Options- A. True
- B. False Discuss
Correct Answer: True
- 3. What do the following declaration signify?
int *ptr[30];
Options- A. ptr is a pointer to an array of 30 integer pointers.
- B. ptr is a array of 30 pointers to integers.
- C. ptr is a array of 30 integer pointers.
- D. ptr is a array 30 pointers. Discuss
Correct Answer: ptr is a array of 30 pointers to integers.
- 4. Range of float id -2.25e+308 to 2.25e+308
Options- A. True
- B. False Discuss
Correct Answer: False
Explanation:
False, The range of float is -3.4e+38 to 3.4e+38.- 5. 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
- 6. 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
- 7. 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.
- 8. The operator used to get value at address stored in a pointer variable is
Options- A. *
- B. &
- C. &&
- D. || Discuss
Correct Answer: *
- 9. 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
- 10. 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.
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- 1. What will be the output of the program if value 25 given to scanf()?