1.main()
{ int i;
i=(2,3);
printf("%d",i);
}
a)2 b)3 c)Compiler error d)Syntax error.
ans : 3
2. main(){
char str[]="GESL";
printf("%d %d",sizeof(str),strlen(str));
}
a)5,5 b)4,4 c)5,4 d)4,5
ans: 5, 4
3. main(){ for(i=0;i++;i<100) printf("hello
world\n"); }
a)100 times b)0 times c)Infinite loop d)None of the above.
ans: 0 times.
4. main(){ for(i=1;i++;i<100) printf("hello
world\n"); }
a)100 times b)0 times c)Infinite loop d)None of the above.
ans: infinite loop
5. main(){ char c; scanf("%s",c); }
a)Compiler dependent b)unpredictable c)Compiler error d)
scans the i/p.
ans: Compiler dependent.
6. main(){
int k=5;
for(++k<5 && k++/5 || ++k<8);
printf("%d\n",k);
}
a)5 b)6 c)7 d)8
ans: 7
7. main(){
int *ptr1,*ptr2;
ptr1=(int *)malloc(sizeof(int));
ptr2=func(20,10,ptr1);
printf("%d %d\n",*ptr1,*ptr2);
}
int *func(int a, int b, int *c)
{
int x=a+b;
*c=a-b;
return(&x);
}
a)Bug in the code. b)No Bugs prints correctly c)Error d)
None of the above.
Ans: Bug in the code.
8). int main() {
int i = 10, j ;
if ( ( j = ~i ) < i )
printf ( "True" ) ;
else
printf ( "False" ) ;
}
a) True b) False c) Compiler Dependent d) None of the above.
ans : True
9. How many bytes are required to create a 3*3 matrix using
double pointer
ans: 12
10. take int=4,float=8,char=1
main() {
FILE *fp;
printf("%d\n",sizeof(fp) );
}
a)2 b)4 c)Compiler dependent d)Error
Ans:4
11. main()
{
int a=10,20;
a^=b^=a^=b;
printf("%d\n %d\n",a,b);
a)a=20,b=10 b)a=10,b=20 c)Syntax error d)Unpredictable
Ans : a=20 b=10
12. main() {
int i=10;
switch(i) {
case 10: printf("Hello "); {
case 1 : printf("World ");
}
case 5: printf("Hello World ");
}
}
a) Hello b) Hello c) Hello World Hello World d) Syntax
Error.
Ans : Hello World Hello World
13. main() {
char str1[]="Hello";
char str2[]="Hello";
if ( str1==str2 )
printf("True\n");
else
printf("False\n");
}
Ans: False.
a)True b)False c)Error d) Unpredictable.
14. main()
{
# include <stdio.h>
int i = 10 ;
printf("%d\n", i/2 );
}
a)10 b)5 c)error d) warning.
ans : 5
15. #include <stdio.h>
# pragma pack(2)
struct SIZE {
int i;
char ch ;
double db ;
} ;
main () {
printf ( "%d\n",sizeof(struct SIZE) );
}
a)12 b)14 c)16 d)8
16. what is big-endian.
a) MSB at lower address LSB at higher address
b) LSB at lower address MSB at higher address
c) memory mgmt technique
d) none of the above
ans:a
17. what is Little-endian.
a) MSB at lower address LSB at higher address
b) LSB at lower address MSB at higher address
c) memory mgmt technique
d) none of the above
ans:b
18. 8086 has
a)16 bit data bus ,16 bit address bus
b)16 bit data bus,32 bit address bus
c)8 bit data bus,16 bit address bus
d)8 bit data bus,8 bit address bus
ans:a
19. what is the
scheduling algorithm used in general operating systems.
a) FCFS algorithm
b) Highest Priority First algorithm
c) Round-Robin algorithm
d) None of the above
ans:c
20. Router is present at
a)Physical layer
b)Data Link Layer
c)Network Layer
d)None of above
ans:c
21. Condition for deadlock occurrence
a) Mutual Exclusion
b) no premption
c) hold and wait
d) circular wait
e) all of the above
ans:d
22. PCI stands for
a)Programmable computer Interface
b)Peripheral Computer Interface
c)programmable Control Interface
d)Peripheral Component Interface
ans:d
23. Toggle state in J-K flip-flop is
a)0 1
b)1 0
c)1 1
d)0 0
ans :c
24. Interrupt is serviced
a)Immediatly when it occurs
b)After the completion of current instruction.
c)Ignored
d)None of the above.
ans:b
25.what is the o/p ?
void main()
{
char
*mess[]={"Have","a","nice","day","Bye");
printf("%d \t %d",sizeof(mess),sizeof(mess[1]));
}
a. 16 4
b. 5 4
c. 20 4
d. Error
answer: c
