Caritor C Interview Questions

Carritor C Interview Questions For Job Seekers to Prepare for the Interview

1.

Struct x
{
int i;
char c;
}
union y{
struct x a;
double d;
};
printf("%d",sizeof(union y));

a)8
b)5
c)4
d)1
ans:8

2.

struct x{
char c1;
char c2;
int i;
short int j;
};
struct y{
short int j;
char c1;
char c2;
int i;
};
printf("%d %d",size of (struct x),size of (struct y));

a)12 12
b)8 8
c)12 8
d)8 12
ans:a

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3.

 enum x {a=1,b,c,d,f=60,y}
printf("%d",y);

a)5
b)61
c)6
d)60
ans:b

4

#include
void main(){
{
# define x 10
}
printf("%d \n",++x);
}

a)11
b)10
c)compile error
d)runtime error
ans:c

5.

#include
void main()
{
int k=2,j=3,p=0;
p=(k,j,k);
printf("%d\n",p);
}

a)2
b)error
c)0
d)3
ans:a

6. How to typedef a function pointer which takes int as a parameter and return an int
a)Is not possible
b)typedef int *funcptr int;
c)typedef int * funcptr( int);
d)typedef int (*funcptr)(int);
ans:d

7.

#include
void main()
{
int k=10;
k<<=1;
printf("%d\n",k);
}

a)10
b)0
c)20
d) compilation error
ans:c

8.

#include
void main()
{
int i=-10;
for(;i;printf("%d\n",i++));
}

a)error
b)prints -10 to -1
c)infinite loop
d)does not print anything
ans:b

9.

#include
void main()
{
int I=65,j=0;
for(;j<26; i++,j++){
printf("%s\n", i);
}
}

a)compilation Error
b)prints A to Z
c)prints a to z
d)runtime error
ans:b

10.

#include
void main()
{
unsigned int i=-1;
printf("%d\n",i);
printf("%u\n",i*-1);
}

a)runtime error
b)compilation error
c)prints -1 to 1
d)prints 1 and 1
ans:c

11.

 #include
void main()
{
int **I;
int *j=0;
i=&j;
if (NULL != i&& NULL != *i){
printf("I am here");
}
}

a)prints I am here
b)does not print anything
c)compilation error
d)runtime error
ans:b

12

#include
void main()
{
int *j=(int *)0x1000;
printf("%p",j);
}

a)prints-1000
b)runtime error
c)compilation error
d)none of the above
ans:d

13

#include
void main()
{
int a[2][2]={{2},{3}};
printf("%d",a[0][0]);
printf("%d",a[0][1]);
printf("%d",a[1][0]);

printf(“%d”,a[1][1]);
}
a) 2300
b)2000
c)0030
d)2030
ans:d

14)

#include
void main(int x)
{
printf("%d",x) ;
}

if the name of the executable file is abc and the command line is given as abc xyz what is the output
a)compilation error
b)1
c)2
d)undefined
ans:2

15.

#include
void main(int argc)
{
char a[]={'1','2','3',0,'1','2','3'};
printf(a);
}

a) compilation error, b) 123, c) 123 123, d) 1230123
ANS:b

16.

#include
void func(int *x)
{
x=(int *) malloc(sizeof(int));
printf("in func: %p\n",x);
}
void main(int argc)
{
int **pp;
int *p;
pp=(int **) malloc(sizeof(int *));
p=(int *) malloc(sizeof((int));
*pp=p;
printf("first:%p \n",*pp);
func(*pp);
printf("last %p \n",*pp);
}

assuming the p is equal to 1000 and x is equal to 2000 after malloc calls
a) 1000,2000,1000,
b) 1000,2000,2000,
c) 1000,1000,1000,
d) 2000,2000,2000
ANS:a

17.

#include
#define const const
void main(int argc)
{
const int x=0;
}

a) compilation error, b) runs fine, c) runtime error, d) none of these
ANS:b

18.

#include
void main(int argc)
{
int d=1234.5678;
printf("%d",d);
}

a) error, b) 1234.5678, c) 1234, d) 1235
ANS:c

19.

#include
void main(int argc)
{
int a[]={5,6};
printf("%d",a[1.6]);
}

a) 5, b) runtime error , c) compilation error, d) 6
ANS:d

20.

#include
struct x
{
int i=0; /*line A*/
};
void main(int argc)
{
struct x y; /*line B*/
}

a) error due to B,
b) no problem with option A and B,
c) error somewhere other than line A and B,
d) error due to line A
ANS:d

21.

#include
void main(int arg c)
{
int x=1111;
printf("%d",!x);
}

a.prints 1111
b.compilation error
c.prints 0
d.is not a valid option
ans:c

22.

struct {
int len;
char *str
}*p;

++p -> len
a.increments p
b. increments len
c.compilation error
d.nothing happens with either of p and len
ans:b

23. int i=10;
a.declaration
b.definition
c.both
d.none
ans:c

24.

#include
void main(int arg c)
{
char a[]=abcdefghijklmnopqrstuvwxyz;
printf(%d,sizeof(a));
}

a.25 b.26 c.27 d.28
ans:c

25.

#include
void main(int arg c)
{
char a[]=abcdefghijklmnopqrstuvwxyz;
char *p=a;
printf(%d,strlen(p));
p+=10;
printf(%d,strlen(a));
}

a.26 26
b.26 16
c.compilation error
d.16 26
ans:a

26 .If a file contains the IT solutions Inc.rn then on reading this line the array str using fgets() what would str contain?
a. IT solutions Inc.
b. IT solutions Inc.r0
c. IT solutions Inc.rn0
d. IT solutions Inc.n0

27. if the following program (myprog)is run from the command line as myprog 1 2 3 what would be the output?

 Main(int argc , char *argv[])
{
int I ,j=0;
for (I=0;I              j=j+atoi(argv);
printf(%d.j);
}

a. 123 b.6 c.error d.123
ans:6

28. when pointers declared initialized to :

a. null
b.newly allocated memory
c)nothing,its random
d)none of the above
ans:c

29. what is the output of the following code?

 #include
oid main()
{
printf("%d",printf(" hello world "));
}
a) 13, b) hello world 13, c) hello world, d) error

ANS:b

30. what is the output of the following code, assuming that the array begins at location 5364875?

 #include
void main()
{
int a[2][3][4]={
{2,1,4,3,6,5,8,7,0,9,2,2}
{1,2,3,4,5,6,7,8,9,0,1,2}
};
printf("%u %u %u %u",a,*a,**a,***a);
}

a) 5364875,5364876,5364877,5364878
b) 5364875,5364876,5364877,2
c) 5364875,5364875,5364876,5364876
d) 5364875,5364875,5364875,2
ANS:d

31. Are null statements in c null pointers.

32. Is cinst int *p same as int const* p