C ,C++Questions

Dept. of Industrial Relations and Placements, Communication and soft skills

Subject Name:- C Language

1) The Real constants in C can be expressed in which of the following formsa)Fractional form only b)Exponential form only c)ASCII form only d) a & b

2) The program, which translates high-level program into its equivalent machine language program, is calleda)Transformer b)Language processor c)Converter d) none of the above

3) Consider the following statements.

i)Multiplication associates left to right ii)Division associates left to rightiii)Unary Minus associates right to left iv)subtraction associates left to righta)only i and ii are true b)all are false c)all are true d)only iii and iv are true

4) What will be the value of variable a in the following code?unsigned char a;a = 0xFF + 1;printf("%d", a);a)0xFF b)0x100 c)0 d)0*0

5) What is the output of the following program?#include <stdio.h>void main(){printf("\n10!=9 : %5d",10!=9);}

a) 10b) Errorc) None of the above

6) What is the output of the following program? #include<stdio.h>void main(){int x=10;(x<0)?(int a =100):(int a =1000);printf(" %d",a);}

a)Error b)1000 c)100 d)None of these options

7) Which of the following shows the correct hierarchy of arithmetic operations in C(a), **, * or /, + or - (b), **, *, /, +, - (c), **, /, *, +, - (d), / or *, - or +

8) What is the output of the following code?#include<stdio.h>

void main(){int a=14;a += 7;a -= 5;a *= 7;printf("\n%d",a);}

a)112 b)98 c)89 d)None of these options

9) What is the output of the following code? #include<stdio.h>#define T tvoid main(){char T = `T`;printf("\n%c\t%c\n",T,t);}

a)Error b)T t c)T T d)t t 10) The statement which prints out the values 1 to 10 on separate lines, is

a)for( count = 1; count <= 10; count = count + 1) printf("%d\n",count);b)for( count = 1; count < 10; count = count + 1) printf("%d\n",count); c)for( count = 0; count <= 9; count = count + 1) printf("%d ",count);d)for( count = 1; count <> 10; count = count + 1) printf("%d\n",count);

11) What does the term `call-by-reference` refer to?a)Passing a copy of a variable into a function. b)Passing a pointer to a variable into a function.

c)Choosing a random value for a variable. d)A function that does not return any values. 12) What is the output of the following code?

#include<stdio.h>void swap(int&, int&);void main(){int a = 10,b=20;swap (a++,b++);printf("\n%d\t%d\t",a, b);}void swap(int& x, int& y){x+=2;y+=3;}

a)14, 24 b)11, 21 c)10, 20 d)Error

13) What is the output of the following program code #include<stdio.h>void abc(int a[]){a++;a[1]=612;}main(){char a[5];abc(a);printf("%d",a[4]);}

a)100 b)612 c)Error d)None of these options

14) which of the following is true about recursive functioni). it is also called circular definitionii). it occurs when a function calls another function more than onceiii). it occurs when a statement within the function calls the function itself iv). a recursive function cannot have a return statement within it"a) i and iii b) i and ii c) ii and iv d)i, iii and iv

15) What will happen if you assign a value to an element of an array whose subscript exceeds the size of the array?a)The element will be set to 0 b)Nothing, its done all the timec)Other data may be overwritten d)Error message from the compiler

16) What is the output of the following code? #include<stdio.h>void main(){int arr[2][3][2]={{{2,4},{7,8},{3,4},}, {{2,2},{2,3},{3,4}, }}; printf("\n%d",**(*arr+1)+2+7);}a)16 b)7 c)11 d) Error

17) If int s[5] is a one dimensional array of integers, which of the following refers to the third element in the array?a)*( s + 2 ) b)*( s + 3 ) c)s + 3 d)s + 2

18) What is the output of the following code? void main(){int i = 100, j = 200;const int *p=&i;p = &j;printf("%d",*p);}a)100 b)200 c)300 d)None of the above

19) What is the output of the following code? #include<stdio.h>void main(){int arr[] = {10,20,30,40,50};int *ptr = arr;printf("\n %d\t%d\t",*ptr++,*ptr);}a)10 20 b)10 10 c)20 20 d)20 10

20) Which of these are reasons for using pointers?1.To manipulate parts of an array2.To refer to keywords such as for and if3.To return more than one value from a function 4.To refer to particular programs more convenientlya)1 & 3 b)Only 1 c)Only 3 d)All of the above

21) During initializing a uniona)Only one member can be initialised. b)All the members will be initialised.

C)Initialisation of a union is not possible. d)None of these options22) What would be the output of the following program?

#include <stdio.h>main(){printf("\n%c", "abcdefgh"[4]);}a)abcdefgh b)d c)e <------ans d)error

23) What is the output of the following code ?void main(){int a=0;int b=0;++a == 0 || ++b == 11;printf("\n%d,%d",a,b);}a)0, 1 b)1, 1 c)0, 0 d)1, 0

24) What is the output of the following program? #include<stdio.h>void main(){while (1){if (printf("%d",printf("%d")))break;elsecontinue;}

}The output isa)Compile time errorb)Goes into an infinite loopc)Garbage values d)None of these options

25) Which of the following is the correct way of declaring a float pointer:a)float ptr; b)float *ptr; c)*float ptr; d)None of the above

26) What is the output of the code

main(){char s[ ]="man";int i;for(i=0;s[ i ];i++)printf("\n%c%c%c%c",s[ i ],*(s+i),*(i+s),i[s]);}


main(){float me = 1.1;double you = 1.1;if(me==you)printf("I love U");elseprintf("I hate U");}


main(){sstatic int var = 5;printf("%d ",var--);if(var)main();}


main(){int c[ ]={2.8,3.4,4,6.7,5};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; }}


main(){int i=-1,j=-1,k=0,l=2,m;m=i++&&j++&&k++||l++;printf("%d %d %d %d %d",i,j,k,l,m);}


main(){char *p;printf("%d %d ",sizeof(*p),sizeof(p));}


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

33) What is the output of the codemain(){printf("%x",-1<<4);}

34) What is the output of the code main() { char string[]="Hello World"; display(string); } void display(char *string)

{ printf("%s",string); }

35) What is the output of the codemain(){int c=- -2;printf("c=%d",c);}

36) What is the output of the code#define int charmain(){int i=65;printf("sizeof(i)=%d",sizeof(i));}

37) What is the output of the codemain(){int i=10;i=!i>14;Printf ("i=%d",i);}

38) What is the output of the code #include<stdio.h>main(){int a[2][2][2] = { {10,2,3,4}, {5,6,7,8} };int *p,*q;p=&a[2][2][2];*q=***a;printf("%d----%d",*p,*q);}

39) What is the output of the codemain(){struct xx{int x=3;char name[]="hello";};struct xx *s;printf("%d",s->x);printf("%s",s->name);}

40) What is the output of the code#include<stdio.h>

main(){struct xx{int x;struct yy{char s;struct xx *p;};struct yy *q;};}

41) What is the output of the codemain(){int i=5;printf("%d%d%d%d%d%d",i++,i--,++i,--i,i);}

42) What is the output of the codemain(){char *p="hai friends",*p1;p1=p;while(*p!='\0') ++*p++;printf("%s %s",p,p1);}

43) What is the output of the code#define clrscr() 100main(){clrscr();printf("%d\n",clrscr());}

44) What is the output of the codevoid main(){char far *farther,*farthest;printf("%d..%d",sizeof(farther),sizeof(farthest));}

45) What is the output of the codemain(){

int i=400,j=300;printf("%d..%d");}


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

47) ) What is the output of the codemain(){int i=1;while (i<=5){printf("%d",i);if (i>2)goto here;i++;}}fun(){here:printf("PP");}

48) What is the output of the code main()

{static char names[5][20]={"pascal","ada","cobol","fortran","perl"};int i;char *t;t=names[3];names[3]=names[4];names[4]=t;for (i=0;i<=4;i++)printf("%s",names[i]);}

49) What is the output of the codevoid main(){int i=5;printf("%d",i++ + ++i);}

50) What is the output of the codevoid main(){int i=5;printf("%d",i+++++i);}


main(){int i;clrscr();printf("%d", &i)+1;scanf("%d", i)-1;}

a. Runtime error.b. Runtime error. Access violation.c. Compile error. Illegal syntaxd. None of the above


main(int argc, char *argv[]){(main && argc) ? main(argc-1, NULL) : return 0;}

a. Runtime error.b. Compile error. Illegal syntaxc. Gets into Infinite loopd. None of the above


main(){int i = 0xff ;printf("\n%d", i<<2);}

a. 4b. 512c. 1020d. 1024


#define SQR(x) x * x

main(){printf("%d", 225/SQR(15));}

a. 1b. 225c. 15d. none of the above


union u{struct st{int i : 4;int j : 4;int k : 4;int l;}st;int i;}u;

main(){u.i = 100;printf("%d, %d, %d",u.i, u.st.i, u.st.l);}

a. 4, 4, 0b. 0, 0, 0c. 100, 4, 0d. 40, 4, 0


union u{union u

{int i;int j;}a[10];int b[10];}u;

main(){printf("\n%d", sizeof(u));printf(" %d", sizeof(u.a));// printf("%d", sizeof(u.a[4].i));}

a. 4, 4, 4b. 40, 4, 4c. 1, 100, 1d. 40 400 4


main(){int i, j, *p;i = 25;j = 100;p = &i; // Address of i is assigned to pointer pprintf("%f", i/(*p) ); // i is divided by pointer p}

a. Runtime error.b. 1.00000c. Compile errord. 0.00000


main(){int i, j;scanf("%d %d"+scanf("%d %d", &i, &j));printf("%d %d", i, j);}

a. Runtime error.b. 0, 0c. Compile errord. the first two values entered by the user


main(){char *p = "hello world";p[0] = 'H';printf("%s", p);}

a. Runtime error.b. “Hello world”c. Compile errord. “hello world”


main(){char * strA;char * strB = I am OK;memcpy( strA, strB, 6);}

a. Runtime error.b. I am OKc. Compile errord. I am O

61) How will you print % character?a. printf(“\%”)b. printf(“\\%”)c. printf(“%%”)d. printf(“\%%”)


const int perplexed = 2;#define perplexed 3

main(){#ifdef perplexed#undef perplexed#define perplexed 4#endifprintf("%d",perplexed);}



struct Foo{char *pName;};

main(){struct Foo *obj = malloc(sizeof(struct Foo));clrscr();strcpy(obj->pName,"Your Name");printf("%s", obj->pName);}

a. Your Nameb. compile errorc. Named. Runtime error


struct Foo{char *pName;char *pAddress;};

main(){

struct Foo *obj = malloc(sizeof(struct Foo));clrscr();obj->pName = malloc(100);obj->pAddress = malloc(100);

strcpy(obj->pName,"Your Name");strcpy(obj->pAddress, "Your Address");

free(obj);printf("%s", obj->pName);printf("%s", obj->pAddress);}

a. Your Name, Your Addressb. Your Address, Your Addressc. Your Name Your Named. None of the above


main(){char *a = "Hello ";char *b = "World";clrscr();printf("%s", strcat(a,b));}

a. Hellob. Hello Worldc. HelloWorldd. None of the above


main(){char *a = "Hello ";char *b = "World";clrscr();printf("%s", strcpy(a,b));}

a. “Hello”b. “Hello World”

c. “HelloWorld”d. None of the above


void func1(int (*a)[10]){printf("Ok it works");}

void func2(int a[][10]){printf("Will this work?");}

main() { int a[10][10];func1(a); func2(a);}

a. Ok it worksb. Will this work?c. Ok it worksWill this work?d. None of the above


main(){printf("%d, %d", sizeof('c'), sizeof(100));}

a. 2, 2b. 2, 100c. 4, 100d. 4, 4


main(){int i = 100;clrscr();printf("%d", sizeof(sizeof(i)));}



main(){int c = 5;printf("%d", main||c);}



main(){char c;int i = 456;clrscr();c = i;printf("%d", c);}

a. 456b. -456c. random numberd. none of the above


void main (){int x = 10;printf ("x = %d, y = %d", x,--x++);}

a. 10, 10b. 10, 9c. 10, 11d. none of the above


main(){int i =10, j = 20;clrscr();printf("%d, %d, ", j-- , --i);printf("%d, %d ", j++ , ++i);}

a. 20, 10, 20, 10b. 20, 9, 20, 10c. 20, 9, 19, 10d. 19, 9, 20, 10


main(){int x=5;clrscr();

for(;x==0;x--) {printf("x=%d\n”", x--);}}

a. 4, 3, 2, 1, 0b. 1, 2, 3, 4, 5c. 0, 1, 2, 3, 4d. none of the above


main(){int x=5;

for(;x!=0;x--) {printf("x=%d\n", x--);}}

a. 5, 4, 3, 2,1b. 4, 3, 2, 1, 0c. 5, 3, 1d. none of the above


main(){{unsigned int bit=256;printf("%d", bit);}{unsigned int bit=512;printf("%d", bit);}}

a. 256, 256b. 512, 512c. 256, 512d. Compile error


main(){int i;clrscr();for(i=0;i<5;i++){printf("%d\n", 1L << i);}}a. 5, 4, 3, 2, 1b. 0, 1, 2, 3, 4c. 0, 1, 2, 4, 8d. 1, 2, 4, 8, 16


main(){signed int bit=512, i=5;

for(;i;i--){printf("%d\n", bit = (bit >> (i - (i -1))));}}

a. 512, 256, 128, 64, 32b. 256, 128, 64, 32, 16c. 128, 64, 32, 16, 8d. 64, 32, 16, 8, 4


main(){signed int bit=512, i=5;

for(;i;i--){printf("%d\n", bit >> (i - (i -1)));}}

a. 512, 256, 0, 0, 0b. 256, 256, 0, 0, 0c. 512, 512, 512, 512, 512d. 256, 256, 256, 256, 256


main(){if (!(1&&0)){printf("OK I am done.");}else{printf("OK I am gone.");}}

a. OK I am doneb. OK I am gonec. compile errord. none of the above


main(){if ((1||0) && (0||1)){

printf("OK I am done.");}else{printf("OK I am gone.");}}

a. OK I am doneb. OK I am gonec. compile errord. none of the above


main(){signed int bit=512, mBit;

{mBit = ~bit;bit = bit & ~bit ;

printf("%d %d", bit, mBit);}}

a. 0, 0b. 0, 513c. 512, 0d. 0, -513

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