1-	what is the output of this program ?

void main()
{
 int const * p=5;
 printf("%d",++(*p));
}


A-  5                 
B- Error             
C- Address of P           
D- 6

Correct answer is : Error because it is defined as constant and cant be changed


2-	write the output of this program 

main()
{
 int c[ ]={2,3,4,6,5};
 int j,*p=c,*q=c;
 for(j=0;j<5;j++)
 {
 printf(" %d ",*c);
 ++q;
 }
 for(j=0;j<5;j++)
{
printf(" %d ",*p);
++p;
 }

Output will be: 2222223465


3-	which pointer can be used as a pointer to the following function :
double multiply (double) ;

A- double *p        
B- double *p(double)         
C- (double) *p (double)      
D-double (*p)(double)

Correct answer is : D
4-	what is the output of the following program

main()
{
 int i=3;
 switch(i)
 {
 default:printf("zero");
 case 1: printf("one");
 break;
 case 2:printf("two");
 break;
 case 3: printf("three");
 break;
 }
 }

A- zero
B- one
C- two
D- three  

The correct answer is D



5-	what is the output of this program 

main()
{
 int c=- -2;
 printf("c=%d",c);
}


A-   2            B-  1             C-  -2       D-   Generate Error 

Correct answer is A


6-	this program generate an error write down which line(s) that cause this error? 


#include<stdio.h>
1-   main()
2-     {
3-     struct xx
4-      {
5-       int x=3;
6-       char name[]="hello";
7-       };
8-       struct xx *s;
9-       printf("%d",s->x);
10-     printf("%s",s->name);
11-       }


Answer : lines 5,6 because we cant initialize the variables in the declaration of struct 



7-	write down the output of this program 
 
main()
{
int i;
for(i=0;i<3;i++)
{
printing();
}
}

void printing()
{
auto int x =5;
x=x+2;
printf(“X=%d  ”,x);
}

The answer is X=7  X=7  X=7


8-	what is the output of the following program

enum colors {BLACK,BLUE,GREEN}
main()
{
printf("%d..%d..%d",BLACK,BLUE,GREEN);
}
Answer: 0..1..2


9-	what is the output of this program 

main()
{
char *p;
p="Hello";
printf("%c\n",*&*p);
}


Answer : H


10-	What is the output of this program 


main()
{
int i=1,j=2;
switch(i)
{
case 1: printf("GOOD");
break;
case j: printf("BAD");
break;
}
}

Answer : error case must take a constant value .



11-	What is the output of this program 
main()
{
char not;
not=!2;
printf("%d",not);
}

Answer:  0


12-	What is the output of this program 

#define FALSE -1
#define TRUE 1
#define NULL 0
main() 
{
if(NULL)
puts("NULL");
else if(FALSE)
puts("TRUE");
else
puts("FALSE");
}


A -  Error             B – NULL          C – TRUE         D – FALSE 


Answer :  C


13-	 What is the output of this program 

main()
{
int *ip;
long *lp;
ip=(int *)10;
lp=(long *)20;

ip++;
lp++;

printf("%d...%d",ip,lp);
}

Answer: 12…24


14-	 Which of the following are valid uses, when the array char box [10] is declared ?

A-	scanf(“%S”,&box);
B-	scanf(“%C”,&box[0]);
C-	scanf(“%S”,box);
D-	scanf(“%c”,*box[0]);


Answer : B,C
15-	What is the output of this program 

main()
{
int y;
scanf("%d",&y);                 // input given is 2000
if( (y%4==0 && y%100 != 0) || y%100 == 0 )
printf("%d is a leap year");
else
printf("%d is not a leap year");
}


Answer :  2000 is a leap year




16-	What is the output of this program 

main ()
{

int x =5,y;
y=function(x)
}

int function (int a)
{
if (a==1)
return 1 ;
else 
return a+function(a-1);
}


Answer : 15



17-	What is the output of this program 

struct point
{
int x;
int y;
};
struct point origin,*pp;

main()
{
origin.x=10;
origin.y=15;
pp=&origin;
printf(“%d %d \n”,pp->x,(*pp).x);
}


Answer :  1010




18-	What is the output of this program 


main()
{
int i=func(10);
printf("%d\n",--i);
}
int func(int i)
{
return(i++);
}


Answer : 9



19-	 What is the output of this program 

main()
{
int *p;
int *q;
//long *r;
p=(int *)890;
q=(int *)920;
p++;
q++;

printf("%d...%d...%d",p,q,q-p);
}

Answer : 892…922…15

20-	 What is the output of this program 

main()
{
int i =0;j=0;
if(i && j++)
printf("%d..%d",i++,j);
printf("%d..%d,i,j);
}


Answer : 0..0



21-	 What is the output of this program 

main()
{
int a[10];
printf("%d",*a+1-*a+3);
}


Answer : 4 



22-	What is the output of this program 

 func(int *a,int *b)
{
*a=*a+*b; *b=*a-*b; *a=*a-*b;
}

main()

{

int x=10,y=20;
func(&x,&y);
printf("x= %d y = %d\n",x,y);
}


Answer : x=20 y = 10 


23-	 What is the output of this program 

main()
{
char *p = “ayqm”;
printf(“%c”,++*(p++));
}


Answer: b



24-	 How to access the element array[2][12] using pointers 

A- &array[2][12]           
B- *array[2]+*array[12]          
C- *(array[2]) +6
D- *(array[2]+6)

Answer: D .



25-	 What is the output of this program 

main()
{
register int a=2;
printf("Address of a = %d",&a);
printf("Value of a = %d",a);
}


Answer : error because the register value don’t have address .



26-	  Is the following code is legal 

struct a
{
int x;
struct a b;
}

A-  YES         B-  NO 


Answer:No


27-	 What is the output of this program 

void main()
{

If (sizeof(struct test*)==sizeof(int *) && sizeof(int *) == sizeof(*float))
Printf(“Equal”) ;
Else
Printf (“Not Equal”);
}


Answer: Equal .



28-	 What is the output of this program 

void main()
{
int i=10, j=2;
int *ip= &i, *jp = &j;
int k = (*ip)/(*jp);
printf(“%d”,k);
}

Answer: 5





29-	 What is the output of the following program 

main()
{
char a[4]="HELLO";
printf("%s",a);
}


Answer : Error  size of the array is just 4 characters