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What will be the output of the program?
#include<stdio.h> int main() { unsigned int i = 65536; /* Assume 2 byte integer*/ while(i != 0) printf("%d",++i); printf("\n"); return 0; }
Options- A. Infinite loop
- B. 0 1 2 ... 65535
- C. 0 1 2 ... 32767 - 32766 -32765 -1 0
- D. No output
- Correct Answer
- No output
ExplanationHere unsigned int size is 2 bytes. It varies from 0,1,2,3, ... to 65535.Step 1:unsigned int i = 65536; here variable i becomes '0'(zero). because unsigned int varies from 0 to 65535.
Step 2: while(i != 0) this statement becomes while(0 != 0). Hence the while(FALSE) condition is not satisfied. So, the inside the statements of while loop will not get executed.
Hence there is no output.
Note: Don't forget that the size of int should be 2 bytes. If you run the above program in GCC it may run infinite loop, because in Linux platform the size of the integer is 4 bytes.
More questions
- 1. 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.
- 2. 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.- 3. 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.- 4. 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.- 5. 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
- 6. 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.- 7. What will be the output of the program (myprog.c) given below if it is executed from the command line?
cmd> myprog one two three/* myprog.c */ #include<stdio.h> #include<stdlib.h> int main(int argc, char **argv) { int i; for(i=1; i<=3; i++) printf("%u\n", &argv[i]); return 0; }If the first value printed by the above program is 65517, what will be the rest of output?
Options- A. 65525 65531
- B. 65519 65521
- C. 65517 65517
- D. 65521 65525 Discuss
Correct Answer: 65519 65521
- 8. What will be the output of the program?
#include<stdio.h> #include<stdlib.h> int main() { int *p; p = (int *)malloc(20); /* Assume p has address of 1314 */ free(p); printf("%u", p); return 0; }
Options- A. 1314
- B. Garbage value
- C. 1316
- D. Random address Discuss
Correct Answer: 1314
- 9. Size of short integer and long integer would vary from one platform to another.
Options- A. True
- B. False Discuss
Correct Answer: True
Explanation:
True, Depending on the operating system/compiler/system architecture you are working on, the range of data types can vary.- 10. Names of functions in two different files linked together must be unique
Options- A. True
- B. False Discuss
Correct Answer: True
Explanation:
True, If two function are declared in a same name, it gives "Error: Multiple declaration of function_name())".
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- 1. What do the following declaration signify?