C Datatypes Q & A
Ques 1. What is the output of following program. Assume that the numbers are stored in 2's complement form.
#include<stdio.h>
int main()
{
int m = -2;
int n = ~1;
printf("0x%x 0x%x ", m, n);
return 0;
}
options:
A. 0xfffffffe 0xfffffffe
B. compiler error
C. -2 -2
D. -2 -1
Ques 2. which is invalid in the following code declaration in C?
1. short int q;
2. signed long a
3. long e;
4. unsigned short r;
options:
A. 1 & 2 valid
B. 3 valid
C. 4 valid
D. all valid
Ques 3. what is the output for the below code?
#include<stdio.h>
int main()
{
float x = 15.0,z;
z = 9/5 * x+32;
printf("z=%0.2f",z);
return 0;
}
options:
A. 47.00
B. 59.00
C. 32.00
D. 45.00
Ques 4. what is the output for the below code?
#include<stdio.h>
int main()
{
char d = '\022';
char e = 022;
printf("%d %d", d,e);
return 0;
}
options:
A. 50 18
B. 22 22
C. Compile time error
D. run time error
Ques 5. In C, sizes of an integer and a pointer always same.
options:
A. True
B. False
Ques 6. what is the output for the below code?
int main()
{
void *gptr, g;
g = 0;
gptr = &g;
printf("%v", *gptr);
getchar();
return 0;
}
options:
A. 0
B. runtime error
C. 48
D. Compile time error
Ques 7. what is the output for the below code?
#include<stdio.h>
int main()
{
char m=0;
char ch = 125;
ch = ch+10;
printf("%d\n ", ch);
return 0;
}
options:
A. -121
B. 121
C. 135
D. compile time error
Ques 8. what is the output ?
#include<stdio.h>
int main()
{
int x = -1;
printf(" %x %x\n", x, sizeof(long));
return 0;
}
options:
A. ffffffff 4
B. -1 4
C. compiler error
D. None of the above
Ques 9. what is the output for the below code?
#include<stdio.h>
int main()
{
float x = 0.1;
if ( x == 0.1 )
printf("IF");
else if (x == 0.1f)
printf("ELSE IF");
else
printf("ELSE");
}
options:
A. ELSE IF
B. ELSE
C. IF
D. error
Ques 10. what is the output for the below code?
#include<stdio.h>
int main()
{
char t = 125;
int i;
for(i=0; i<5; i++)
printf("%d ", t++);
return 0;
}
options:
A. 125 126 127 128 129
B. 125 126 127 -128 -127
C. infinete loop
D. none of the above
Ques 11. what is the output for the below code?
#include<stdio.h>
int main()
{
char t = 0;
for(t=0; t<135; t++)
printf("\n%d", t);
return 0;
}
options:
A. prints 0 to 135
B. infinite loop
C. error
D. runtime error
Ques 12. Which data type is most suitable for storing a number 65000 in a 32-bit system?
options:
A. signed short
B. unsigned short
C. long
D. int
Ques 13: Which of the following is a User-defined data type?
options:
A. typedef int signedint32;
B. typedef enum {Jan, Feb, Mar, Apr, MAy} Months;
C. struct {char str[10], int age};
D. all of the mentioned
Ques 14: What is the size of an int data type?
Options:
A. 4 bytes
B. 8 bytes
C. Depends on the system /compiler
D. 2 bytes
Ques 15: What is the output for the below program?
#include<stdio.h>
int main()
{
char ch;
int j = 0;
FILE *file;
file = fopen("test.txt", "w+");
fprintf(file, "%c", 'd');
fprintf(file, "%c", -1);
fprintf(file, "%c", 'g');
fclose(file);
file = fopen("test.txt", "r");
while ((ch = fgetc(file)) != -1)
printf("%c", ch);
return 0;
}
options:
A. d
B. depends on what fgets returns
C. depends on compiler
D. infinite loop
Ques 16: What is the output for the below program?
#include<stdio.h>
int main()
{
void *gptr;
int *g;
gptr=(int *)malloc(4);
g=(int* ) gptr;
*g=43;
*(int *)gptr=34;
printf("%d %d", *g, *(int*)gptr);
getchar();
return 0;
}
options:
A. 34 34
B. 35 35
C. compiler error
D. run time error
Ques 17: What is the output for the below program?
#include<stdio.h>
int main()
{
int x,y;
double d;
x=44, y=5;
d=x/y;
printf("%lf", d);
return 0;
}
options:
A. 8.80000
B. 8.0000
C. compiler error
D. run time error
Ques 18: What is the output for the below program?
#include<stdio.h>
int main()
{
float x,y;
double d;
x=4.0, y=5.0;
d=x/y/x;
printf("%lf", d);
return 0;
}
options:
A. 0.8000
B. 3.2000
C. 0.2000
D. run time error
Ques 19: What is the output for the below program?
#include<stdio.h>
int main()
{
unsigned int m=121;
signed int i=225;
char c=34;
c=i+m;
printf("%d",c);
return 0;
}
options:
A. runtime error
B. compiler error
C. 346
D. 90
Ques 20: What is the output for the below program?
#include<stdio.h>
int main()
{
unsigned int m = 65632;
signed short i=225;
i = m;
printf("%i",i);
return 0;
}
options:
A. 65632
B. 65631
C. 96
D. 97
Answers
1. A
2. D
3. A
4. A
5. B
6. D
7. A
8. A
9. A
10. B
11. B
12. B
13. D
14. C
15. A
16. A
17. B
18. C
19. D
20. C
