pointers

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Pointersand

Functions

14-7-2014

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Pointers

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1. What is the output of the following

program?

main()

{

int a=10;

int *b;

b=&a;

a=20;

Printf(%d,b);

}

a)10

b)20

c)Garbage valued)error

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2.What is the output of the following

program?

main()

{

int a=A;char *c;

c=(char * )&a;

printf(%c,c);}

a)NULL

b)0

c)Ad)garbage value

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3. what will be the output of the

following program?

int main()

{

int i=3, *j, k;j = &i;

printf("%d\n", i**j*i+*j);

return 0;}

a)30

b)20

c)300

d)garbage value

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4. If the starting address of the array

a[] is 1000and integer size is 2

Bytes.then what is the output ofthe following program?

main(){

int a[]={1,2,3,4,5};

printf(%u,a2);

}

a)1004

b)1002

c)1000d)1006

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5. If the starting address of the array

a[] is 1000 then what is the output of

the following program?

main(){

int a[]={1,2,3,4,5};

printf(%u,(a2));

}

a) 4b) 2

c) 1

d) 3

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6.what is the output of the following

program?

main()

{

char a*+=hello how r u;

int i;

for(i=0;i

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program?

main()

{

int a,*b,**c;

a=120;

b=&a;

c=&b;

printf(%d,c);

}

a)120

b)garbage value

c)20

d)error

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program?

main()

{

int a,*b,**c;

a=12;

b=&a;

*b=10;

c=&b;**c=20;

printf(%d,a);

}

a)10

b)20

c)12

d)22

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9.what will be the output of the

following program?

int main() {

int x=30, *y, *z;

y=&x; /* Assume address of x is 500 and integer is 4 byte size */

z=y;

*y++=*z++;

x++;

printf("x=%d, y=%d, z=%d\n", x, y, z);

return 0;

}

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program?

main()

{

int a=12,*b;

void *c;c=&a;

b=&a;

*b=9;

printf(%d,(int *)c);

}

a)9

b)12c)21

d)garbage value

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11. what will be the output of the

following program?

main()

{

int a=10,b=20;int *const p=&a;

p=&b;

printf("%d",*p);}

a) 20

b)10c) compiler error

d) garbage value

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following program?

main()

{

int a=10,b=20;int *const p=&a;

a=b;

printf(%d,p);}

a)10

b)20

c)compiler errord)garbage value

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following program?

main()

{

int a=10,b=20;const int *p=&a;

p=&b;

printf(%d,p);}

a)10b)20

c)error

d)garbage value

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following program?

main()

{

int a=10,b=20;const int *p=&a;

*p=b;

printf(%d,p);}

a) 20

b)10c) compile time error

d) garbage value

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following program on a 16 bit

platform?#include

main()

{

printf(%d %d, sizeof(NULL), sizeof();

}

a) 1 1 b)2 1 c)2 2 d)4 2

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FUNCTIONS

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program?

main()

{printf(hello);

main();

}

a) Prints hello until stack

overflows

b) Prints hello infinitely

c) main should not be

called in main()d) No output

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program?

main()

{

float b;

b=sum(10.1,20.2);

printf(%f, b);

}

float sum(float a, float b)

{

float c;c=a+b;

return c;

}

a) Declaration syntax error b)30.300000 c)30 d)30.3

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program?

main()

{

int a=10,b=20;swap(a,b);

printf(%d%d, a, b);

}

swap(int a,int b)

{

int t;t=a;

a=b;

b=t;

}

a) 10 20 b)20 10 c)20 30 d)30 10

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4. what will be the output of the following program?

#include

void fun(int, int);

int main()

{

int i=5, j=2;

fun(i, j);printf("%d, %d", i, j);

return 0;

}

void fun(int i, int j)

{

i = i*i;

j = j*j;

}

a)25 4

b)5 2

c)compiler errord)garbage values

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5.what will be the output of the following program?

#include

int i;

int fun();

int main()

{

while(i){

fun();

main();

}

printf("Hello\n");

return 0;

}

int fun()

{printf("Hi");

}

a) Hello b)Hi Hello

c)displays Hi, Hello infinitely

d)no output

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6. #include

int fun(int);

int main()

{

int no=5;

fun(no);

return 0;

}

int fun(int no)

{if(no == 0) return 0;

else printf("%d,", no);

fun(no--);

}

a)5 4 3 2 1

b)5 4 3 2 1 0c)1 2 3 4 5

d)displays 5 until stack

overflows.

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7. #include

void fun(int);

int main(){

int a=3;

fun(a);return 0;

}

void fun(int n)

{

if(n > 0)

{fun(--n);

printf("%d,", n);

fun(--n);

}}

A) 0, 2, 1, 0, B) 1, 1, 2, 0,

C) 0, 1, 0, 2, D) 0, 1, 2, 0,

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8. #include

int main()

{

void fun(char*);

char a[100];

a[0] = 'A'; a[1] = 'B'; a[2] = 'C'; a[3] = 'D';

fun(&a[0]);

return 0;

}

void fun(char *a)

{

a++;printf("%c", *a);

a++;

printf("%c", *a);

}

a.)AB b.)BC

c.)CD d.)No output

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9.what will be the output of the following?

#include

int main()

{

int fun(int);

int i = fun(10);

printf("%d\n", --i);

return 0;

}

int fun(int i){

return (i++);

}

A.)9 B.)10 C.)11 D.)8

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program?main()

{

printf(%d,add(5,6));

}

add(char a,char b)

{

char c;

c=a+b;return c;

}

a) 11

b)56

c) 59d)60

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program?

main()

{

void swap(int *,int *)int a=20, b=30;

swap(&a,&b);

printf(%d %d,a,b);}

void swap(int *x, int *y)

{

int t;t=*x;

*x=*y;

*y=t;

}

a) 20 30 b)30 20 c)30 30 d)20 20

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program?

main()

{

int a=5,b=4;int c;

c=fun(a,b);

printf(%d,c);}

int fun(int a,int b)

{

if(b==0)

return 0;else if(a==0)

return 0;

else

return a+fun(a,--b);

}

a)9 b)20 c)54 d)garbage value

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program?

main()

{

int a;

int c;

scanf(%d,&a);

c=fun(a)

printf(%d,c);

}

int fun(int a)

{

if(a==0 ||a==1)

return 1;else

return a*fun(a-1);

}

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program?

main()

{

int i;

int a=10;

for(i=1;i

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program?

main()

{

static int i;

int j;

for(i=1;i

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17. what is the output of the following

program?

fun(char *a)

{

a++;

}

main()

{

char s=welcome;

fun(s);

printf(%s,s);

}

a)welcome

b)elcome

c)lcome

d)error

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program?

int i=10;

main()

{

int i;

printf(%d,i++);

}

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program?

main()

{

int (*p)(int,int);

int add(int,int);

p=add;

printf(%d,p(13,43));}

int add(int a,int b)

{

return (a+b);

}

a)34 b)56 c)45 d)Error

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STRUCTURES & UNIONS

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1.Which of the following are

themselves a collection of differentdata types?

a)String

b)Int

c)Structure

d)array

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2.) How will you free the allocated memory ?

a)remove(var-name);

b) free(var-name);

c) delete(var-name);

d) dalloc(var-name);

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3.What will be output of the following

program?

struct student{

int rollno=1;

char name=xyz;};

main()

{

struct student s;printf(%d,s.rollno);

}

a)1

b)xyz

c)1 xyz

d)error

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following program?struct student{

int rollno;

char *name;};

main()

{

struct student s=12,xyz-;printf(%d \t %s,s.rollno,s.name);

}

a)12 xyz

b)12c)error

d)xyz

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5.What will be the output of the

program ?

#includemain()

{

union a

{int i;

char ch[2];

};

union a u;u.ch[0]=3;

u.ch[1]=2;

printf("%d, %d, %d\n", u.ch[0], u.ch[1], u.i);

}

A. 3, 2, 515

B. 515, 2, 3

C. 3, 2, 5

D. 3, 2 , 32

h h f h f ll

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6.which of the following operator

connects the structure name to its

member?a) >

b)

pointers

Documents

int tt

output of thefollowing

0i5212018 pointers

a10b20c12d225212018

output5212018 pointers

output ofthe

intint main

breturn c