Final Expert Level c Aptitude Round

8/2/2019 Final Expert Level c Aptitude Round

1/23

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ANSWER

1 | P a g e

1) What will be the output of the following program?void fun(char * msg,);

int main(){fun(Nothing specific\n,1,4,7,11,0);

}void fun(char * msg,){

int tot=0;

va_list ptr;int num;va_start(ptr,msg);

num=va_arg(ptr,int);num=va_arg(ptr,int);printf(\n%d,num);

}

A) 1B) 2C) Runtime ErrorD) 4

2) What is the correct statement about the given piece of code?void varfun(int n,);

int main(){

varfun(3,7.5,-11.4,0.33);}

void varfun(int n,){float *ptr;int num;

va_start(ptr,n);num=va_arg(ptr,int);

printf(\n%d,num);}

A) The first argument will be converted to float.B) The type of ptr is float* which will be converted to va_list *C) Variable number of arguments must declare the ptr of type va_list.D) The program successfully compiles and will display 3.000000.3) Which of the given options is correct about the following program

void display(char * s,);

int fun1();

int fun2();

int main(){

int(*p1)();int (*p2)();


2/23

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p1=fun1;p2=fun2;

display(Bye,p1,p2);

return 0;}

void display(char * s,){

int (*pp1)();int (*pp2)();

va_list ptr;

va_start(ptr,s);pp1=va_arg(ptr,int(*)());

(*pp1)();pp2=va_arg(ptr,int(*)());

(*pp2)();

}

int fun1(){

printf(\nHello);return 0;

}

int fun2(){printf( Hi);

return 0;

}

A) va_arg cannot extract the function pointer from the variable argument list in themanner tried above.

B) Program runs successfully to display Hello HiC)

The address of a function cannot be passed to the function with variable number ofarguments.

D) Function with fixed arguments cannot be called from function with variablearguments.

4) Which of the following is the correct output for the program given below?int main(){

printf(%x,-1


3/23

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3 | P a g e

for(i=1;i


4/23

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4 | P a g e

}

A) 2 BytesB) 48 bytesC) 12 bytesD) 24 bytes9) What is the correct statement about the following piece of code?

int main(){

int ***p,i,j,k;p=(int***)malloc(sizeof(int**)*4);

for(i=0;i


5/23

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ANSWER

5 | P a g e

to a function which receives two pointers to int pointers and returns a pointer toan int pointer.

C) f is a pointer which returns a pointer to an int pointer and receives as itsparameters an integer and a pointer to a function which receives nothing andreturns pointer to int pointer

D) f is a function that returns a pointer to an array of pointers to functiontofunctions that return a pointer to an int pointer.12)What will be the output of the following program?

int main(){char near * near * ptr1;

char near * far * ptr2;char near * huge * ptr3;

printf(%d %d %d,sizeof(ptr1),sizeof(ptr2),sizeof(ptr3));

}

A) 2 4 4B) 4 4 2C) 2 2 2D) 4 4 413)Which of the following is the correct output?

int main(){

unsigned int res;

res=(64>>(2+1-2))&(~(1


6/23

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6 | P a g e

C) All ZerosD) 8 0

0 032 00 16

15)Which of the following statements are correct?int main(){

unsigned int m[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};unsigned char n,i;

scanf(%d,&n);for(i=0;i


7/23

CORRECT

ANSWER

7 | P a g e

typedef float f;static f *fptr;

float fval=90;

fptr=&fval;printf(\n%f,*fptr);

return 0;}

A) 9B) 0C) 90.000000D) 9018)Which of the following output is correct?

int main(){

int i=4,j=-1,k=0,w,x,y,z;w=i || j ||k;x=i && j && k;

y=i || j && k;z=i && j || k;printf(%d %d %d %d,w,x,y,z);

return 0;

}

A) 1 1 1 1B) 1 1 0 1C) 1 0 0 1D) 0 1 1 1E) 1 0 1 1

19)Which of the following output is correct?int fun(int,int);typedef int (*pf) (int,int);

int proc (pf,int,int);

int main(){

printf(%d\n,proc(fun,6,6));

return 0;

}

int fun(int a,int b){

return (a==b)

}int proc(pf p,int a,int b){

return ((*p)(a,b));

}

A) 6


8/23

CORRECT

ANSWER

8 | P a g e

B) 1C) 0D) -120)Which of the following output is correct?

int main(){static int arr[]={0,1,2,3,4};

int *p[]={arr,arr+1,arr+3,arr+4};

int **ptr=p;ptr++;

printf(%d %d %d\n,ptr-p,*ptr-arr,**ptr);*ptr++;

printf(%d %d %d\n,ptr-p,*ptr-arr,**ptr);

*++ptr;printf(%d %d %d\n,ptr-p,*ptr-arr,**ptr);++*ptr;

printf(%d %d %d\n,ptr-p,*ptr-arr,**ptr);return 0;

}

A) 0 0 01 1 1

2 2 23 3 3

B) 1 1 22 2 33 3 4

4 4 1

C) 1 1 12 2 2

3 34 4 4

D) 1 1 12 3 33 4 4

3 5 Garbage

21)Which of the following is the correct output in gcc under linux?int main(){

enum value{VAL1,VaL2,VaL3,VAL4,VAL5}var;

printf(\n%d,sizeof(var));

return 0;}


9/23

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A) 1B) 2C) 4D) 10

22)Which of the following is the correct output for the program givenbelow if a short int is 2 bytes wide ?

#includeint main()

{

short int i=0;for(i=-1;++I;i>0)

printf(%u\n,i);

printf(\n);return 0;}

A. 165535

B. Expression syntax errorC. No OutputD. 0 1 2 3 4 5

23)Which of the following statements are correct about the C programgiven below ?

# include

int main()

{int x=10,y=100%90;for(i=1;i


10/23

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ANSWER

10 | P a g e

while(i=0) printf(%d,i);

i=5;

printf(\n);while(i=0) printf(%i,i);

printf(\n);

return 0;}

A. 4 3 2 1 0 -14 3 2 1 0 -1

B. 5 4 3 2 1 05 4 3 2 1 0

C. Error

D. 5 4 3 2 1 05 4 3 2 1 0

5 4 3 2 1 0

25)Which of the following is the correct output for the program given below ?#include

int main()

{unsigned int i=65535; /* assume a 2-byte integer */while(i++!=0)

printf(%d,++i);

printf(\n);return 0;

}

A. Infinite loopB. 0 1 265535C. 1 2 .32767 -32766 -32765.-1 0

D. No output

26)What will be the output of the following program ?#include#define MIN(x,y) (x


11/23

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11 | P a g e

27)Which of the following is the stage at which the statement#include

gets replaced by the contents of the file stdio.h ?

A) During editingB) During linkingC) During executionD) During preprocessingE) During compilation

28) Which of the following is the correct output for the program given below ?#includeint main()

{int arr[3] = {2,3,4};

char *p;

p = arr;p= (char *) ((int *)(p));

printf(%d,*p);p=(int *)(p+1);

printf(%d \n,*p);return 0;

}

A) 2 3 4B) 2 0C) 2D) Garbage values

29) Which of the following is the correct output for the program given below ?

#include

int main(){

int arr[3]={2,3,4};

char *p;p=arr;p=(char*)((int*)(p));

printf("%d",*p);p=(int*)(p+1);

printf("%d\n",*p);return 0;

}

A) 2 3 4

B) 2 0C) 2D) Garbage values


12/23

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ANSWER

12 | P a g e

30) Which of the following is the correct output for the program given below?

#include

int main(){

void *vp;char ch=74,*cp="JACK";

int j=65;vp=&ch;

printf("%c",*(char*)vp);

vp=&j;printf("%c",*(int*)vp);

vp=cp;printf("%s\n",(char*)vp+2);

return 0;

}

A) JCK

B) J65KC) JAKD) JACK


#include

void fun(void *p)

int i;

int main(){

void *vptr;vptr=&i;fun(vptr);return 0;

}void fun(void *p){

int **q;q=(int**)&p;printf("%d\n",**q);

}

A) Error:Cannot convert from void ** to int**

B) Garbage value

C) 0D) No output


13/23

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ANSWER

13 | P a g e


#include

int main(){

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

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

return 0;

}

A) 30B) 27

C) 9

D) 3


#include

int *check(static int,static int);

int main(){

int *c;

c=check(10,20);

printf("%d\n",*c);return 0;

}

int *check(static int i,static int j)

{ int *p,*q;

p=&i;q=&j;if(i>=45)return(p);

elsereturn(q);

}

A) 10B) 20

C) Error: 'Non portable pointer conversion'

D) Error: 'Cannot use static for function parameters'

34) Which of the following statement is correct about k used in the statement given below?

char****k;


14/23

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ANSWER

14 | P a g e

A) k is pointer to a pointer to a pointer to a charB) k is pointer to a pointer to a pointer to a pointer to a char

C) k is pointer to a char pointer

D) k is pointer to a pointer to a char

35) Which of the following statements correctly declare a function that receives a pointer toa pointer to a pointer to a float and returns a pointer to a pointer to a pointer to a pointer to

a float ?

A) float** fun(float ***);

B) float* fun(float ***);C) float fun(float ***);

D) float **** fun(float ***);

36) Which of the following statements is correct about the program given below ?

int main()

{

int arr[3][3] = {1,2,3,4};printf("%d\n",*(*(*(arr))));return 0;

}

A) It will output a garbage value

B) It will output a value 1

C) It will output a value 1

D) It will report an error: 'Invalid indirection'

37) Which of the following statement is true about the program given below ?

#includeint main(){

float a=3.14;char *j;j=(char *)&a;

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

return 0;}

A) It will print ASCII value of the binary number present in the first byte of the floatvariable a.B) It will print character equivalent of the binary number present int the first byte of the

float variable a.

C) It will print 3.D) It will print a garbage value


15/23

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ANSWER

15 | P a g e

38) Which of the following statement is true about the program given below ?

#includepower(int**);

int main(){

int a=5,*aa; /* Suppose the address of the variable a is 1000 */

aa=&a;a=power(&aa);

printf("%d\n",a);return 0;

}

power(int **ptr){

int b;

b=**ptr***ptr;return(b);

}

A) 5B) 25C) 125

D) Garbage value

39) What will be the output of the following program if the size of the

pointer is considered as 4 bytes ?

#includeint main(){

printf("%d %d\n",sizeof(NULL),sizeof(**));

return 0;}

A) 00B) 01C) 11

D) 41


#include

int main()

{int i;


16/23

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ANSWER

16 | P a g e

char a[]="\0";if(printf("%s",a))

printf("String is not empty\n");

elseprintf("The string is empty\n");

return 0;}

A) The string is not emptyB) The string is empty

C) No output

D) 0


#include

int main(){

char str1[]="Hellow";

char str2[]="Hellow";

if(str1==str2)printf("Equal\n");else

printf("Unequal\n");

return 0;}

A) Equal

B) UnequalC) Error

D) None of the above


#include

int main(){

printf("Icecream""Chocolate pie\n");

return 0;

}

A) Error

B) Icecream chocolate pieC) IcecreamD) Chocoloate pie


17/23

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ANSWER

17 | P a g e


#include

#includeint main()

{char str1[20]="Hell0",str2[20]="Word";

printf("%s\n",strcpy(str2,strcat(str1,str2)));return 0;

}

A) Hello

B) WorldC) Hello World

D) WorldHello


#include

int main()

{int i;char a[]="\0";

if(printf("%s",a))

printf("The string is not empty\n");else

printf(''The string is empty\n");

return 0;

}

A) The string is not emptyB) The string is emptyC) No outputD) 0


#include

int main()

{char str1[]="Hello";

char str2[]="Hello";

if(str1==str2)printf("Equal\n");else

printf("Unequal\r");

return 0;}


18/23

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ANSWER

18 | P a g e

A) Equal

B) Unequal

C) ErrorD) None of the above


#includeint main()

{printf("Icecream""Chocolate pie\n");

return 0;

}

A) Error

B) Icecream Chocolate pieC) IcecreamD) Chocolate pie


#include#include

int main()

{

chr str1[20]="Hello",str2[20]="World";printf("%s\n",strcpy(str2,strcat(str1,str2)));

return 0;}

A) Hello

B) WorldC) Hello WorldD) WorldHello


#includeint main()

{

char str[]="sales\0man\0";printf("%d\n",sizeof(str));return 0;

}

A) 10


19/23

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19 | P a g e

B) 6C) 5

D) 11


#include

int main(){

Union a{

Int I;

Char ch[2];};Union a u1 = {512};

Union a u2 = (0,2);Return 0;}

A) u2 CANNOT be initialized as shownB) u1 can be initialized as shown.C) To initialize char ch[] of u2 . Operator should be used.

D) All above


#includeint main()

{Struct byte

{Int one:1;

};Struct byte var = {1};Printf(%d\n,var.one);

Return 0;}

A) 1

B) -1C) 0

D) Error


#includeint main()


20/23

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ANSWER

20 | P a g e

{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);

return 0;}

A) 3 2 515

B) 515 2 3

C) 3 2 5D) None of the above


#include

int main()

{Unsigned int num;Int c=0;

Scanf(%u,&num);

for(;num;num>=1){

If(num &1)c++;

}

Printf(%d\n,c);Return 0;

}

A)It counts the number of bits that are on in the number num.B) It sets all bits in the number num to 1.

C) It sets all bits in the number num to 0D) None of the above

53) Which of the following is the correct output for the program given below ?#include

#include

int main(){

float n=1.54;

printf(%f%f\n,ceil(n),floor(n));

return 0;}


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ANSWER

21 | P a g e

A) 2.000000 1.000000B) 1.500000 1.500000

C) 1.550000 2.000000

D) 1.000000 2.000000

54) Which of the following is the correct output for the program given below ?#include

int main(){

printf(%d%d%d\n,sizeof(3.14f),sizeof(3.14),sizeof(3.14l));

return 0;}

A) 4 4 4B) 4 8 8

C) 4 8 10

D) 4 8 12

55) What will be the output of the following program ?

#include#define FUN(I,J) i##jint main()

{

int val1=10;int val12=20;printf(%d\n,FUN(val1,2));

return 0;

}A) 10

B) 20

C) 1020

D) 12

56) What will be the output of the following program ?#includeint main(){

char c=48;int I,mask=01;for(i=1;i


22/23

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ANSWER

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#include#include

int main()

{int *p;

p=(int*)malloc(256*256);if(p==NULL)

printf(Allocation failed);return 0;

}

A) Run Time ErrorB) Segmentation FaultC) It will print Allocation FailedD) Linker Error

58) Will the following code work at all times ?

#includeint main(){

char *ptr;

gets(ptr);printf(%s\n,ptr);return 0;

}

A) Run Time ErrorB) Memory not allocated for ptrC)

Stack overflowD) Linker Error

59) which of the following is correct order of calling function is code snippet givenbelow

a=f1(23,14)* f2(12/4)+f3();

a)f1,f2,f3

b)f3,f2,f1

c)The order may vary from compiler to compiler

d) None of above


23/23

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ANSWER

23 | P a g e

60) what will be the output of the following programint main()

{

int i=-3,j=2,k=0,m;

m=++i&&++j && ++k;

printf(%d%d%d\n,i,j,k,m);

return 0;

}

A) -2 3 0B) -2 3 1C) -2 -2 -2D) 0 0 0

Final Expert Level c Aptitude Round

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