Quickheal Tech Pvt Limited Placement Sample Paper

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Quick Heal Placement Sample Paper :

1. Which of the following involves context switch,

(a) system call
(b) privileged instruction
(c) floating point exception
(d) all the above
(e) none of the above

Ans: (a)

2. In OST, terminal emulation is done in

(a) sessions layer
(b) application layer
(c) presentation layer
(d) transport layer

Ans: (b)

3. For a 25MHz processor , what is the time taken by the instruction which needs 3 clock cycles,

(a)120 nano secs
(b)120 micro secs
(c)75 nano secs
(d)75 micro secs

4. For 1 MB memory, the number of address lines required,

(a)11
(b)16
(c)22
(d) 24

Ans. (b)


5. Make the pointer aligned to a 4 byte boundary in a efficient manner

ANS. Assign the pointer to a long number and the number with 11...1100 add 4 to the number

6. What is a far pointer (in DOS)

7. Describe the file system layout in the UNIX OS

8. describe boot block, super block, inodes and data layout

9. In UNIX, are the files allocated contiguous blocks of data

ANS. no, they might be fragmented

10. Write a program to remove duplicates from a sorted array.

ANS. int remove_duplicates(int * p, int size)
{
int current, insert = 1;
for (current=1; current < size; current++)
if (p[current] != p[insert-1])
{
p[insert] = p[current];
current++;
insert++;
} else
current++;

return insert;

}