1. Difference between static & non-static variables.
2. Define Pointers
3. Write your own String Copy function.
4. What is the purpose of Volatile in C.
5. What is the purpose of Static in C?
6. One question was like
static int x;
It will be accessed by-------- in a file 1.c {Hint: It is based on scope of variables}
7. What is the Output?
main()
{
char *p1="name";
char *p2;
p2=(char*)malloc(20);
memset(p2,0,20);
while(*p2++ = *p1);
printf("%s\n",p2);
}
 
8. Long function based on command line arguments, u have 2 find out the error...
Ans: I think some error in 2nd If condition.
9. What is the Output of given snippet?
void main()
{
int x=20, y=35;
x= x++ + y++;
y= y++ + x++;
printf("%d%d", x,y);
}
 
10. main()
{
char s1[] = "XYZ";
char s2[] = "inc";
printf("%s", s1);
}
 
11. Simple strcat code was given.
Ans: XYZinc
12. #define TRUE 0
----------- Some code
 

while(TRUE)
{
---------- Some code
       }
 
what is the Output?
 
13. main()
       {
int x=10,y=15;
x= x++;
y= y++;
printf("%d%d",x,y);
}
 
 What is the output?
 
14. int a;
if(a==0)printf("XYZ");
printf("XYZ");
 
What is the output?
 
15. int x;
int modify(int x)
{
return(x+=10);
}
int changevalue(int x)
{
        return(x+=1);
}
    
void main()
{
int x=10;
x++;
modify(x);
x++;
printf("%d",x);
x++;
changevalue(x);
x++;
modify(x);
printf("%d",x);
}
 
16. Difference between malloc and calloc and implement malloc as calloc.
 
17. Implement realloc with full error checking code.
 
18. Implement a in-memory look up table of int type and write a function having time
complexity of O(logn).
 
19. Program for converting binary>>>decimal or similar to this.
 
20. void main()
{
          int x= 5;
printf("%d%d%d",x,x<<2,x>>2);
}
 
21. #define swap(a,b) a=a+b; b=a-b; a=a-b;
void main()
{
int x=5, y=10;
swap(x,y);
printf("%d%d", x, y);
swap2(x,y);
printf("%d%d", x, y);
}
   
swap2(int a, int b)
{
int temp;
temp=a;
a=b;
b=temp;
}
 
what is the Output?
 
22. void main()
{
char *ptr= "xyz";
*ptr++;
printf("%d\n", ptr);
ptr++;
printf("%d", ptr);
}
 
23. Explain the given declarations
           
char *const ptr;
        
char const *ptr;
   
similar to this // Its pointer to constant and constant pointer
 

Hint : Run the given codes, because no options will be there in the paper
you have to directly write the answers.
Time is ample but u should be accurate.