Dharma placement papers 


Dharma c questions

Give the output of the programs in each case unless 
mentioned otherwise : 

1.
void main()
{
int d=5;
printf("%f",d);
} 

Ans: Undefined 


2.
void main()
{
int i;
for(i=1;i<4,i++)
switch(i)
case 1: printf("%d",i);break;
{
case 2:printf("%d",i);break;
case 3:printf("%d",i);break;
}
switch(i) case 4:printf("%d",i);
} 

Ans: 1,2,3,4 


3.
void main()
{
char *s="\12345s\n";
printf("%d",sizeof(s));
} 

Ans: 6 


4.
void main()
{
unsigned i=1; /* unsigned char k= -1 => k=255; */
signed j=-1; /* char k= -1 => k=65535 */
/* unsigned or signed int k= -1 =>k=65535 */
if(i<j)
printf("less");
else
if(i>j)
printf("greater");
else
if(i==j)
printf("equal");
} 

Ans: less 


5.
void main()
{
float j;
j=1000*1000;
printf("%f",j);
}

1. 1000000
2. Overflow
3. Error
4. None 

Ans: 4 


6.  How do you declare an array of N pointers to functions 
returning
     pointers to functions returning pointers to characters?

Ans: The first part of this question can be answered in at 
least
        three ways:

    1. char *(*(*a[N])())();

    2. Build the declaration up incrementally, using 
typedefs:

        typedef char *pc;    /* pointer to char */
        typedef pc fpc();    /* function returning pointer 
to char */
        typedef fpc *pfpc;    /* pointer to above */
        typedef pfpc fpfpc();    /* function returning... */
        typedef fpfpc *pfpfpc;    /* pointer to... */
        pfpfpc a[N];         /* array of... */

    3. Use the cdecl program, which turns English into C 
and vice
    versa:

        cdecl> declare a as array of pointer to function 
returning
            pointer to function returning pointer to char
        char *(*(*a[])())()

    cdecl can also explain complicated declarations, help 
with
    casts, and indicate which set of parentheses the 
arguments
    go in (for complicated function definitions, like the 
one
    above).
    Any good book on C should explain how to read these 
complicated
    C declarations "inside out" to understand them 
("declaration
    mimics use").
    The pointer-to-function declarations in the examples 
above have
    not included parameter type information. When the 
parameters
    have complicated types, declarations can *really* get 
messy.
    (Modern versions of cdecl can help here, too.)


7. A structure pointer is defined of the type time . With 3 
fields min,sec hours having pointers to intergers.
    Write the way to initialize the 2nd element to 10. 


8. In the above question an array of pointers is declared.
    Write the statement to initialize the 3rd element of 
the 2 element to 10; 


9.
int f()
void main()
{
f(1);
f(1,2);
f(1,2,3);
}
f(int i,int j,int k)
{
printf("%d %d %d",i,j,k);
}

What are the number of syntax errors in the above?

Ans: None. 


10.
void main()
{
int i=7;
printf("%d",i++*i++);
}

Ans: 56 


11.
#define one 0
#ifdef one
printf("one is defined ");
#ifndef one
printf("one is not defined ");

Ans: "one is defined"


12.
void main()
{
int count=10,*temp,sum=0;
temp=&count;
*temp=20;
temp=&sum;
*temp=count;
printf("%d %d %d ",count,*temp,sum);
}

Ans: 20 20 20


13. There was question in c working only on unix machine 
with pattern matching.


14. what is alloca() 

Ans : It allocates and frees memory after use/after getting 
out of scope 


15.
main()
{
static i=3;
printf("%d",i--);
return i>0 ? main():0;
}

Ans: 321 


16.
char *foo()
{
char result[100]);
strcpy(result,"anything is good");
return(result);
}
void main()
{
char *j;
j=foo()
printf("%s",j);
}

Ans: anything is good. 


17.
void main()
{
char *s[]={ "dharma","hewlett-packard","siemens","ibm"};
char **p;
p=s;
printf("%s",++*p);
printf("%s",*p++);
printf("%s",++*p);
} 

Ans: "harma" (p->add(dharma) && (*p)->harma)
"harma" (after printing, p->add(hewlett-packard) &&(*p)-
>harma)
"ewlett-packard" 
 

  
Dharma placement papers