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- Question
What will be the output of the program, if a short int is 2 bytes wide?
#include<stdio.h> int main() { short int i = 0; for(i<=5 && i>=-1; ++i; i>0) printf("%u,", i); return 0; }
Options- A. 1 ... 65535
- B. Expression syntax error
- C. No output
- D. 0, 1, 2, 3, 4, 5
- Correct Answer
- 1 ... 65535
Explanationfor(i<=5 && i>=-1; ++i; i>0) so expression i<=5 && i>=-1 initializes for loop. expression ++i is the loop condition. expression i>0 is the increment expression.In for( i <= 5 && i >= -1; ++i; i>0) expression i<=5 && i>=-1 evaluates to one.
Loop condition always get evaluated to true. Also at this point it increases i by one.
An increment_expression i>0 has no effect on value of i.so for loop get executed till the limit of integer (ie. 65535)
More questions
- 1. 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
- 2. 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.
- 3. The operator used to get value at address stored in a pointer variable is
Options- A. *
- B. &
- C. &&
- D. || Discuss
Correct Answer: *
- 4. 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
- 5. 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.
- 6. 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.- 7. 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.- 8. 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.- 9. 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
- 10. What will be the output of the program?
#include<stdio.h> int X=40; int main() { int X=20; printf("%d\n", X); return 0; }
Options- A. 20
- B. 40
- C. Error
- D. No Output Discuss
Correct Answer: 20
Explanation:
Whenever there is conflict between a local variable and global variable, the local variable gets priority.
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- 1. What will be the output of the program in 16-bit platform (under DOS)?
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