SUBEX SYSTEM Question-Paper Contributed by Mohit updated on Jul 2019

                                                     Subex Testing Paper

Technical Skills Test :

1. What will be the output of the following program?
Note: Space is represented by 0.
int main(int argc,char *argv[])
{
char *s=“Hello,world”;printf(“%10s”,s);
}
a) Hello,world0000000000 
b) Hello,worl 
c) 0000000000Hello,world 
d) Hello,world
ans: d

2. In the below program the getNewString function is defined and it returns a character pointer. This function is called from main function as defined below. What will be the output of this program?
char *getNewString( )
{static char xxx[1024];return xxx;}
main( )
{
char g[]=“First”;char *p;strcpy(getNewString( ),g);
p=getNewString( );
strcpy(p,“Second”);
printf(“The string is : %s”,getNewString( ));
}

a) The string is : First 
b) The string is : FirstSecond 
c) The string is
d) Unknown, since the scope of the pointer is local
ans: c

3. What will be output of the following recursive program?
void printme(int *p)
{int q=*p;if(*p>0)
{q=*(p);printme(p);}printf(“%d”,q);}void main(void)
{int x[5]={0,16,12,8,1};
printme(&x[4]);}

a) 0,0,1,2,3, 
b)4,8,12,16,0, 
c) Error cannot pass elemenpointer
d) 0,16,12,8,4

4. What is the output of the following line in 32-bit OS?
printf(“%d%d\n”,sizeof(‘a’),sizeof(“a”));
a) 4,2 
b) 1,1 
c) 1,2 
d)2,2

5. What is the output of following program?
#include
#include
main( )
{char str[]=“Welcome to Subex Systems”;
char *ptr;
ptr=strtok(str,“ ”);
while(ptr) ptr=strtok(NULL,“ ”);
printf(“%s\n”,str);}

a) Welcome to Subex Systems 
b) Error, since NULL is passed to strtok
c)NULL 
d) Welcome

6. Study the program below and predict the output
#include
int compute(int (*)(int),int);
int cube(int);
main( )
{printf(“%d\n”,compute(cube,4));}
/* no syntax errors please…have fun!!*/
int compute(int(*f),int in)
{int res=0,i;for(i=1;i<=in;i++);res+=(*f)(i);return(res);}
int cube(int n)
{return (n*n*n);}

a) 150 
b) 64 
c) 125 
d)225

7. The output of the following program is
#include
main( )
{
int i=-1;while(i<5)
{
#ifdef _X_printf(“%d”,i++);#endif
}
}
a) Compiler error
b) -1,0,1,2,3,4, 
c) Infinite loop 
d) 1,2,3,4,

8. The output of the following program is
#include
void f(char* p);
main( )
{
char *p=(char*)l;f(p);printf(“%s\n”,p);
}
void f(char *p)
{
char sz[]=”hello”;p=sz;
}

a) Runtime error 
b) NULL 
c)hello 
d) Compiler error

9. The output of the following program is
#includestdio.h>
void f(char **p)
{
char *sz=“hello”;*p=sz;
}
main( )
{
char *p=“NULL”;f(&p);printf(“%s\n”,p);
}

a) Compiler error 
b) Runtime error 
c) hello 
d) 1

10. The output of the following program is
#include
main( )
{
int n;if(n<=-1)
{
int x=1else
{
int x=1;
}a) Compiler error b) Unpredictable output c) 10 d) 1

11. The correct declaration of a pointer “func” to function returning a “char” and taking no parameters is
a) char func( )* func;
b) char (*func)( );
c) char* ( ) func;
d) None of the above

12. The output of the following program is
#include
#define arbit 5
main( )
{
printf(“%d\n”,arbit
}
a) 5 
b) 6 
c) Compiler error 
d) Runtime error

13. Determine which of the following are valid identifiers
i. Return
ii.123 45 6789
iii. Record_1
iv. $Tax
a) iii & iv 
b) i & iii 
c) i,ii & iv 
d) i & iv

14. The output of the following program is
#include
struct x {int a; char *b;} *p;
main( )
p=(struct x*) 100;
printf(‘%d,%d,%d\n”,p,p+1,&p[2]);
a) 100,108,116 
b) Compilation error 
c) 100,104,108 
d) 100,103,106


15. What is the output of the following?
main( )
int a[5]={5,1,15,20,25};
int i=1;
printf(“\n%d%d”,a++,a[++i]);
a) 2,16 
b) 1,15 
c) 1,20 
d) 2,1

16. What is the output of the following
main( )
int a[5]={5,1,15,20,25};
int i=1;
printf(“\n%d%d”,a,a[i++i]);

a) 2,16 
b) 1,15 
c) 1,20 
d) 2,16

16. static float table [2][3]={{1,1,1,2,1,3},{2,1,2,2,2,3}};What is the value of *(*(table)+1)+1?

a) 2,2 
b)1,2 
c) 2,1 
d) 2,3

17. What is the output of the following program?
#include
main( )
int i,j,x=0;
for(i=0;i<5;++i)
for(j=0;j
x+=(i+j-1);
printf(“%d”,x);
break;

a) 1 
b) 0 
c) 2 
d) None of the above

18. Consider the following
i. Pointer to a function that accepts 3 integer arguments and returns a floating-point quantity
float(8pf)(int a, int b,int c)

ii. Pointer to a function that accepts 3 pointers to integer quantities as arguments an returns a pointer to a floating-point quantity
float *(*pf)(int *a,int *b,int *c);

a) i is true, ii is true 
b) i is true,ii is false
c) i is false, ii is false 
d) i is false, ii is true

19. Consider the following statements
i. An integer quantity can be added to or subtracted from a pointer variables.
ii. Two pointer variables can be added.
iii. A pointer variable can be multiplied by a constant
iv. Two pointer variables of same type can be subtracted.

a) Only ii & iv are true 
b) Only iii is false 
c) Only ii is false 
d) Only i & ii are true

20. If p is a pointer ,what does p mean?
a) Same as *(*p+i)
b) Same as *(p+i)
c) Same as *p+i
d) None of the above

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