HCL Sample Placement Papers

Company: HCL Technologies

HCL Test Paper-1
C Programming
Q1. 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 declaraion 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 declarin pointer to a function
Q2. What are the values printed by the following program?
#define dprint(expr) printf(#expr “=%dn”,expr)
main()
{
int x=7;
int y=3;
dprintf(x/y);
}
Choice:
a) #2 = 2 b) expr=2 c) x/y=2 d) none
Q3. What is th output of the following program?
int x= 0x65;
main()
{
char x;
printf(“%dn”,x)
}
a) compilation error b) ‘A’ c) 65 d) unidentified
Q4. What is the output of the following program
main()
{
int a=10;
int b=6;
if(a=3)
b++;
printf(“%d %dn”,a,b++);
}
a) 10,6 b)10,7 c) 3,6 d) 3,7 e) none
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Q5. 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
Q6. 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
Q7. 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
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Q8. 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
General computer concepts
Q1. Which of the following involves context switch,
(a) system call
(b) priviliged instruction
(c) floating poitnt exception
(d) all the above
(e) none of the above
Q2. In OST, terminal emulation is done in
(a) sessions layer
(b) application layer
(c) presentation layer
(d) transport layer
Q3. For 1 MB memory, the number of address lines required,
(a)11
(b)20
(c)22
(d) 24
4. Semaphore is used for
(a) synchronization
(b) dead-lock avoidence
(c) box
(d) none
5. Piggy backing is a technique for a) Flow control b) sequence c) Acknowledgement d) retransmition
6. the operating system (mapping of virtual to physical address)
A 177333(conversion of HEX “0xFEDB”in octal)
In signed magnitude notation what is the minimum value that can be represented with 8 bits
(a) -128
(b) -255
(c) -127
(d) 0