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Q:

Write a c program for linear search.

Answer

#include<stdio.h>
int main(){

    int a[10],i,n,m,c=0;

    printf("Enter the size of an array: ");
    scanf("%d",&n);

    printf("Enter the elements of the array: ");
    for(i=0;i<=n-1;i++){
         scanf("%d",&a[i]);
    }

    printf("Enter the number to be search: ");
    scanf("%d",&m);
    for(i=0;i<=n-1;i++){
         if(a[i]==m){
             c=1;
             break;
         }
    }
    if(c==0)
         printf("The number is not in the list");
    else
         printf("The number is found");

    return 0;
}

Sample output:
Enter the size of an array: 5
Enter the elements of the array: 4 6 8 0 3
Enter the number to be search: 0
The number is found

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Subject: Programming

Q:

Write a c program to check whether a number is strong or not.

Answer

#include<stdio.h>
int main(){
int num,i,f,r,sum=0,temp;

printf("Enter a number: ");
scanf("%d",&num);

temp=num;
while(num){
      i=1,f=1;
      r=num%10;

      while(i<=r){
         f=f*i;
        i++;
      }
      sum=sum+f;
      num=num/10;
}
if(sum==temp)
      printf("%d is a strong number",temp);
else
      printf("%d is not a strong number",temp);

return 0;
}

Sample output:
Enter a number: 145
145 is a strong number

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Subject: Programming

Q:

What will output when you compile and run the following code?

#include <stdio.h>
struct student
{

int roll;
int cgpa;
int sgpa[8];

};

void main()
{

struct student s = { 12,8,7,2,5,9 };
int *ptr;
ptr = (int *)&s;
clrscr();
printf( "%d", *(ptr+3) );
getch();

}

A) 8	B) 7
C) 2	D) Compiler error

Answer & Explanation Answer: C) 2

Explanation:

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Q:

What will be output when you will execute following c code?

#include <stdio.h>
void main()

{
switch(2)

{
case 1L:printf("No");
case 2L:printf("%s","I");
goto Love;
case 3L:printf("Please");
case 4L:Love:printf("Hi");
}
}

A) I	B) IPleaseHi
C) IHi	D) Compilation error

Answer & Explanation Answer: C) IHi

Explanation:

It is possible to write label of goto statement in the case of switch case statement.

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Q:

What will be output when you will execute following c code?

#include <stdio.h>
enum actor

{
    SeanPenn=5,
    AlPacino=-2,
    GaryOldman,
    EdNorton
};
void main()

{
enum actor a=0;
switch(a)

{
case SeanPenn: printf("Kevin Spacey");
                         break;
case AlPacino: printf("Paul Giamatti");
                         break;
case GaryOldman:printf("Donald Shuterland");
                         break;
case EdNorton: printf("Johnny Depp");
}
}

A) Kevin Spacey	B) Paul Giamatti
C) Donald Shuterland	D) Johnny Depp

Answer & Explanation Answer: D) Johnny Depp

Explanation:

Default value of enum constant
GaryOldman = -2 +1 = -1
And default value of enum constant
EdNorton = -1 + 1 = 0
Note: Case expression can be enum constant.

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Q:

What will be output of following c code?

void main()
{
struct india
{
char c;
float d;
};
struct world
{
int a[3];
char b;
struct india orissa;
};
struct world st ={{1,2,3},'P','q',1.4};
clrscr();
printf("%dt%ct%ct%f",st.a[1],st.b,st.orissa.c,st.orissa.d);
getch();
}

Answer

Output: 2 p q 1.400000

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Subject: Programming

Q:

What will be output of following c code?

void main()
{
struct bitfield
{
unsigned a:5;
unsigned c:5;
unsigned b:6;

}bit;
char *p;
struct bitfield *ptr,bit1={1,3,3};
p=&bit1;
p++;
clrscr();
printf("%d",*p);
getch();
}

Answer

Output: 12

Explanation:
Binary value of a=1 is 00001 (in 5 bit)
Binary value of b=3 is 00011 (in 5 bit)
Binary value of c=3 is 000011 (in 6 bit)

In memory it is represented as:
Let address of bit1 is 500 which initialize to char pointer p. Since can is one byte data type so p++ will be 501. *p means content of memory location 501 which is (00001100) and its binary equivalent is 12. Hence output is 12.

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Subject: Programming

Q:

What will be output of following program?

#include <stdio.h>
int main()

{
   void (*p)();
int (*q)();
int (*r)();
   p = clrscr;
   q = getch;
   r = puts;
(*p)();
(*r)("www.sawaal.com");
(*q)();
return 0;
}

A) NULL	B) www.sawaal.com
C) Compilation error	D) None of above

Answer & Explanation Answer: B) www.sawaal.com

Explanation:

p is pointer to function whose parameter is void and return type is also void. r and q is pointer to function whose parameter is void and return type is int . So they can hold the address of such function.

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