C Q Bank

C Skills Written Test Questions

1. find(int x,int y)
{ return ((xcall find(a,find(a,b)) use to find
(a) maximum of a,b
(b) minimum of a,b
(c) positive difference of a,b
(d) sum of a,b

2. integer needs 2bytes , maximum value of an unsigned integer is
(a) { 2 power 16 } -1
(b) {2 power 15}-1
(c) {2 power16}
(d) {2 power 15}

3.y is of integer type then expression
3*(y-8)/9 and (y-8)/9*3 yields same value if
(a)must yields same value
(b)must yields different value
(c)may or may not yields same value
(d) none of the above

4. 5-2-3*5-2 will give 18 if
(a)- is left associative,* has precedence over -
(b) - is right associative,* has precedence over -
(c) - is right associative,- has precedence over *
(d)- is left associative,- has precedence over *

5. printf("%f", 9/5);
prints
(a) 1.8,
(b) 1.0,
(c) 2.0,
(d) none
.
6. if (a=7)
printf(" a is 7 ");
else
printf("a is not 7");
prints
(a) a is 7,
(b) a is not 7,
(c) nothing,
(d) garbage.

7. if (a>b)
if(b>c)
s1;
else s2;
s2 will be executed if
(a) a<= b,
(b) b>c,
(c) b<=c and a<=b,
(d) a>b and b<=c.

8. main()
{
inc(); ,inc(); , inc();
}
inc()
{ static int x;
printf("%d", ++x);
}
prints
(a) 012,
(b) 123,
(c) 3 consecutive unappreciable numbers
(d) 111.

9.preprocessing is done

(a) either before or at beginning of compilation process
(b) after compilation before execution
(c) after loading
(d) none of the above.

10. printf("%d", sizeof(""));
prints
(a) error
(b)0
(c) garbage
(d) 1.

11.main()
{
int a=5,b=2;
printf("%d", a+++b);
}

(a) results in syntax,
(b) print 7,
(c) print 8,
(d) none,

12. process by which one bit pattern in to another by bit wise operation is
(a) masking,
(b) pruning,
(c) biting,
(d) chopping,

13.value of automatic variable that is declared but not initialized
will be
(a) 0,
(b) -1,
(c) unpredictable,
(d) none,

14. int v=3, *pv=&v;
printf(" %d %d ", v,*pv);
output will be
(a) error
(b) 3 address of v,
(c) 3 3
(d) none.

15. declaration
enum cities{bethlehem,jericho,nazareth=1,jerusalem}
assian value 1 to
(a) bethlehem
(b) nazareth
(c)bethlehem & nazareth
(d)jericho & nazareth

16. #include
#include
void main()
{
char buffer[82]={80};
char *result;
printf( "input line of text, followed by carriage return :n");
result = cgets(buffer);
printf("text=%sn",result);
}
(a) printf("length=%d",buffer[1]);
(b) printf("length=%d",buffer[0]);
(c) printf("length=%d",buffer[81]);
(d) printf("length=%d",buffer[2]);

17. consider scanf and sscanf function , which is true

(a) no standard function called sscanf
(b) sscanf(s,...) is equivalent to scanf(...) except that
input charecter are taken from string s.
(c) sscanf is equivalent to scanf.
(d) none of above.

18. #include
main()
{
char line[80];
scanf("%[^n]",line);
printf("%s",line);
}
what scanf do ?
(a) compilation error . Illegal format string.
(b) terminates reading input into variable line.
(c) and (d) other two options.

19. Problem was big so i couldn't remember . Simple one.

20 . ceil(-2.8) ?
(a) 0
(b) -3.0
(c) -2.0
(d) 2

21. for( p=head; p!=null; p= p -> next)
free(p);

(a) program run smooth.
(b) Compilation error.
(c) Run time error.
(d) None of above.

22. int x[3][4] ={
{1,2,3},
{4,5,6},
{7,8,9}
}
(a) x[2][1] = x[2][2] =x[2][3] = 0
(b) value in fourth column is zero
(c) value in last row is zero
(d) none of above.

24. main ()
{
printf("%u" , main());
}
(a) print garbage.
(b) Execution error
(c) printing of starting address of function main.
(d) Infinite loop.

25 . int a, *b = &a, **c =&b;
....
....
.....
a=4;
** c= 5;

(a) doesn't change value of a
(b) assign address of c to a.
(c) assign value of b to a.
(d) assign 5 to a.

28 . answer: swapping of values .

30 . i =5;
i= (++i)/(i++);
printf( "%d" , i);
prints ,
(a) 2
(b) 5
(c) 1
(d) 6