(Paper) HCL Placement Paper (C- Programming)

PAPER: HCL Placement Paper (C- Programming)

 C Programming

1. Which of the following about the following two declaration is true
i ) int *F()
ii) int (*F)()

Choice :
a) Both are identical
b) The first is a correct declaration and the second is wrong
c) The first declaration is a function returning a pointer to an integer and the second is a pointer to function returning int
d) Both are different ways of declaring pointer to a function

Answer : c) The first de...

2. What are the values printed by the following program?

#define dprint(expr) printf(#expr "=%d\n",expr)

main()
{
int x=7;
int y=3;
dprintf(x/y);
}

Choice:
a) #2 = 2 b) expr=2 c) x/y=2 d) none

Answer: c)x/y=2

3. Which of the following is true of the following program

main()
{
char *c;
int *ip;
c =(char *)malloc(100);
ip=(int *)c;
free(ip);
}
Ans: The code functions properly releasing all the memory allocated

4.output of the following.
main()
{
int i;
char *p;
i=0X89;
p=(char *)i;
p++;
printf("%x\n",p);
}
ans:0X8A

5.which of the following is not a ANSI C language keyword?

Ans: Function.

6. When an array is passed as parameter to a function, which of the following statement is correct

choice:
a) The function can change values in the original array
b) In C parameters are passed by value. The function cannot change the original value in the array
c) It results in compilation error when the function tries to access the elements in the array
d) Results in a run time error when the function tries to access the elements in the array

Answer: a) The fu...

7. The type of the controlling expression of a switch statement cannot be of the type

a) int b) char c) short  d) float  e) none

Answer : d) float

8.What is the value of the expression (3^6) + (a^a)?

a) 3 b) 5 c) 6 d) a+18 e) None

Answer : 5

9. What is the value assigned to the variable X if b is 7 ?
X = b>8 ? b <<3 : b>4 ? b>>1:b;

a) 7 b) 28 c) 3 d) 14 e) None
Ans: 3;

10. Which is the output produced by the following program
main()
{
int n=2;
printf("%d %d\n", ++n, n*n);
}

a) 3,6 b) 3,4 c) 2,4 d) cannot determine

Answer : b) 3,4

11. What is the output of the following program?
int x= 0x65;
main()
{
char x;
printf("%d\n",x)
}

a) compilation error b) 'A' c) 65 d) unidentified

ans. d)

12. What is the output of the following program
main()
{
int a=10;
int b=6;

if(a=3)
b++;
printf("%d %d\n",a,b++);
}

a) 10,6 b)10,7 c) 3,6 d) 3,7 e)
none

Answer : d) 3,7

13. What can be said of the following program?
main()
{
enum Months {JAN =1,FEB,MAR,APR};
Months X = JAN;
if(X==1)
{
printf("Jan is the first month");
}
}

a) Does not print anything
b) Prints : Jan is the first month
c) Generates compilation error
d) Results in runtime error

Answer: b) Prints : Jan..

14. What is the output of the following program?
main()
{
char *src = "Hello World";
char dst[100];
strcpy(dst,src);
printf("%s",dst);
}
strcpy(char *dst,char *src)
{
while(*src) *dst++ = *src++;
}

a) "Hello World" b)"Hello" c)"World" d) NULL e)
unidentified

Answer: d) NULL

15. What is the output of the following program?

main()
{
int l=6;
switch(l)
{ default : l+=2;
case 4: l=4;
case 5: l++;
break;
}
printf("%d",l);
}
a)8 b)6 c)5 d)4 e)none

Answer : c)5

16. What is the output of the following program?
main()
{
int x=20;
int y=10;
swap(x,y);
printf("%d %d",y,x+2);
}
swap(int x,int y)
{
int temp;
temp =x;
x=y;
y=temp;
}

a)10,20 b) 20,12 c) 22,10 d)10,22
e)none

Answer:d)10,22

17. What is the output of the following problem ?
#define INC(X) X++
main()
{
int X=4;
printf("%d",INC(X++));
}

a)4 b)5 c)6 d)compilation error e) runtime
error

Answer : d) compilation error no ++++ operator allowed

18. what can be said of the following

struct Node {
char *word;
int count;
struct Node left;
struct Node right;
}

a) Incorrect definition
b) structures cannot refer to other structure
c) Structures can refer to themselves. Hence the statement is OK
d) Structures can refer to maximum of one other structure

Answer :c)

19. What is the size of the following union.
Assume that the size of int =2, size of float =4 and
size of char =1.
Union Tag{
int a;
flaot b;
char c;
};

a)2 b)4 c)1 d) 7

ans : b.)

20) What is the output of the following program? (. has been used to indicate a space)
main()
{
char s[]="Hello,.world";
printf(%15.10s",s);
}

a)Hello,.World...
b)....Hello,.Wor
c)Hello,.Wor.... (this option is correct for
%s-15.10s)
d) None of the above

Ans: b.) total 15 spaces and print only 10 characters.

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