C Question

1. Base class has some virtual method and derived class has a method with the same name. If we initialize the base class pointer with derived
object, Calling of that virtual method will result in which method being called? 

a. Base method
b. Derived method...

2. For the following C program

#define AREA(x)(3.14*x*x)
main()
{float r1=6.25,r2=2.5,a;
a=AREA(r1);
printf("\n Area of the circle is %f", a);
a=AREA(r2);
printf("\n Area of the circle is %f", a);
}

What is the output?

3.
void main()
{
int d=5;
printf("%f",d);
}


4.
void main()
{
int i;
for(i=1;i<4,i++)
switch(i)
case 1: printf("%d",i);break;
{
case 2:printf("%d",i);break;
case 3:printf("%d",i);break;
}
switch(i) case 4:printf("%d",i);
}


5.
void main()
{
char *s="\12345s\n";
printf("%d",sizeof(s));
}


6.
void main()
{
unsigned i=1; /* unsigned char k= -1 => k=255; */
signed j=-1; /* char k= -1 => k=65535 */
/* unsigned or signed int k= -1 =>k=65535 */
if(i<j)
printf("less");
else
if(i>j)
printf("greater");
else
if(i==j)
printf("equal");
}


7.
void main()
{
float j;
j=1000*1000;
printf("%f",j);
}

1. 1000000
2. Overflow
3. Error
4. None


8.  How do you declare an array of N pointers to functions returning
     pointers to functions returning pointers to characters?






9.
int f()
void main()
{
f(1);
f(1,2);
f(1,2,3);
}
f(int i,int j,int k)
{
printf("%d %d %d",i,j,k);
}

What are the number of syntax errors in the above?



10.
void main()
{
int i=7;
printf("%d",i++*i++);
}



11.
#define one 0
#ifdef one
printf("one is defined ");
#ifndef one
printf("one is not defined ");




12.
void main()
{
int count=10,*temp,sum=0;
temp=&count;
*temp=20;
temp=&sum;
*temp=count;
printf("%d %d %d ",count,*temp,sum);
}


13. what is alloca()


14.
main()
{
static i=3;
printf("%d",i--);
return i>0 ? main():0;
}



15.
char *foo()
{
char result[100]);
strcpy(result,"anything is good");
return(result);
}
void main()
{
char *j;
j=foo()
printf("%s",j);
}


16.
void main()
{
char *s[]={ "dharma","hewlett-packard","siemens","ibm"};
char **p;
p=s;
printf("%s",++*p);
printf("%s",*p++);
printf("%s",++*p);
}

17. Output of the following program is

main()
{int i=0;
for(i=0;i<20;i++)
{switch(i)
case 0:i+=5;
case 1:i+=2;
case 5:i+=5;
default i+=4;
break;}
printf("%d,",i);
}
}

a) 0,5,9,13,17
b) 5,9,13,17
c) 12,17,22
d) 16,21
e) Syntax error

18. What is the ouptut in the following program

main()
{char c=-64;
int i=-32
unsigned int u =-16;
if(c>i)
{printf("pass1,");
if(c<u)
printf("pass2");
else
printf("Fail2");
}
else
printf("Fail1);
if(i<u)
printf("pass2");
else
printf("Fail2")
}

a) Pass1,Pass2
b) Pass1,Fail2
c) Fail1,Pass2
d) Fail1,Fail2
e) None of these

19. What will the following program do?

void main()
{
int i;
char a[]="String";
char *p="New Sring";
char *Temp;
Temp=a;
a=malloc(strlen(p) + 1);
strcpy(a,p); //Line number:9//
p = malloc(strlen(Temp) + 1);
strcpy(p,Temp);
printf("(%s, %s)",a,p);
free(p);
free(a);
} //Line number 15//

a) Swap contents of p & a and print:(New string, string)
b) Generate compilation error in line number 8
c) Generate compilation error in line number 5
d) Generate compilation error in line number 7
e) Generate compilation error in line number 1

20. In the following code segment what will be the result of the function,

value of x , value of y
{unsigned int x=-1;
int y;
y = ~0;
if(x == y)
printf("same");
else
printf("not same");
}

a) same, MAXINT, -1
b) not same, MAXINT, -MAXINT
c) same , MAXUNIT, -1
d) same, MAXUNIT, MAXUNIT
e) not same, MAXINT, MAXUNIT

21. What will be the result of the following program ?

char *gxxx()
{static char xxx[1024];
return xxx;
}

main()
{char *g="string";
strcpy(gxxx(),g);
g = gxxx();
strcpy(g,"oldstring");
printf("The string is : %s",gxxx());
}

a) The string is : string
b) The string is :Oldstring
c) Run time error/Core dump
d) Syntax error during compilation
e) None of these

22.Find the output for the following C program

main()
{
char *p1="Name";
char *p2;
p2=(char *)malloc(20);
while(*p2++=*p1++);
printf("%s\n",p2);
}

23.Find the output for the following C program

main()
{
int x=20,y=35;
x = y++ + x++;
y = ++y + ++x;
printf("%d %d\n",x,y);
}

24.Find the output for the following C program

main()
{
int x=5;
printf("%d %d %d\n",x,x<<2,x>>2);
}

25 Find the output for the following C program

#define swap1(a,b) a=a+b;b=a-b;a=a-b;
main()
{
int x=5,y=10;
swap1(x,y);
printf("%d %d\n",x,y);
swap2(x,y);
printf("%d %d\n",x,y);
}
int swap2(int a,int b)
{
int temp;
temp=a;
b=a;
a=temp;
return;
}


26 Find the output for the following C program

main()
{
char *ptr = "Ramco Systems";
(*ptr)++;
printf("%s\n",ptr);
ptr++;
printf("%s\n",ptr);
}


27 Find the output for the following C program

#include<stdio.h>
main()
{
char *p1;
char *p2;
p1=(char *) malloc(25);
p2=(char *) malloc(25);
strcpy(p1,"Ramco");
strcpy(p2,"Systems");
strcat(p1,p2);
printf("%s",p1);
}


28.Find the output for the following C program

# define TRUE 0
some code
while(TRUE)
{
some code
}

29. struct list{
       int x;
      struct list *next;
      }*head;

        the struct head.x =100

       Is the above assignment to pointer is correct or wrong ?

30.What is the output of the following ?

      int i;
      i=1;
      i=i+2*i++;
      printf(%d,i);

31. FILE *fp1,*fp2;

      fp1=fopen("one","w")
      fp2=fopen("one","w")
      fputc('A',fp1)
      fputc('B',fp2)
      fclose(fp1)
      fclose(fp2)
     }

     Find the Error, If Any?

32. #define MAN(x,y) (x)>(y)?(x):(y)
      {int i=10;
      j=5;
      k=0;
      k=MAX(i++,++j);
      printf(%d %d %d %d,i,j,k);
      }

33.void main()
{
int i=7;
printf("%d",i++*i++);
}


34.How will u terminate the statement?

35.select the wrong one
a.a+=1;
b.a*=2;
c.a**=1;
d.a>>=1;

36.pick the odd one
a.malloc
b.calloc
c.new

37.main()
{
char **p=="Hello";
printf("%s",**p);
}

38.main()
{
printf("%d%c\n");
printf("%d%c\n");
}

39.main()
{
int x==5;
printf("%d%d",x++,++x);
}

40.main()
{
int x==4;
printf("%d",printf(" %d %d ",x,x) );
}

41.main()
{
union
{
int i;
char p;
struct
{
int t;
char e;
char o;
};
};
printf("%d\n",sizeof(l) );
}

42.main()
{
int i==0,n==6;
while(n--0);
i+==n;
printf("%d\n",i);
}

 

Answers 

 

1.        B

2.        Area of the circle is 122.656250
 Area of the circle is  19.625000

 

3.        Undefined

4.        1,2,3,4

5.        6

6.        less

7.        4

8.       char *(*(*a[N])())();

9.        None.

10.     56

11.     "one is defined"

12.     20 20 20

13.    It allocates and frees memory after use/after getting out of scope

14.     321

15.    anything is good.

16.    "harma" (p->add(dharma) && (*p)->harma)
"harma" (after printing, p->add(hewlett-packard) &&(*p)->harma)
"ewlett-packard"

17.     (d)

18.     (c)

19.     (b)

20.     (a)

21.     (b)

22.     An empty string

23.     57 94

24.     5 20 1

25.     10 5

26.     Samco Systems

27.     RamcoSystems

28.    This won't go into the loop as TRUE is defined as 0

29.     Wrong

30.     4

31.    no error. But It will over writes on same file.

32.    10 5 0

33.     56

34.     ;

35.    C

36.    C

37.     Garbage or nothing

38.     Garbage Value

39.    6 6

40.     4 4 5

41.     4

42.     -1

43.     0

44.     3

45.     16 21

46.    UPPER CASE

47.     5 4 3 2 1

48.     (newdictionary)-(dictionarynew)

49.     (newdictionary)-(dictionarynew)

 

50.     50