Company: HCL Technologies

HCL System Software Sample Test Paper

NOTE : This is a system paper and not application paper

General Computer Concepts

1. Piggy backing is a technique for
a) Flow control
b) Sequence
c) Acknowledgement
d) retransmition
Ans. (c)

2. In OSI, terminal emulation is done in
(a) sessions layer
(b) application layer
(c) presentation layer
(d) transport layer
Ans: (b)

3.Bit parity check,when performed on a byte ,can
a)odd number of errors
b)even number of errors
c)any number of errors
d)none of the above
Ans: (a)

4. In signed magnitude notation what is the minimum
value that can be represented with 8 bits
(a) -128
(b) -255
(c) -127
(d) 0
Ans: (c)

5. For 1 MB memory, the number of address lines
(d) 24
Ans. (c)

6.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
Ans: (a)

7. Semaphore is used for
(a) synchronization
(b) dead-lock avoidence
(c) both a and b
(d) none
Ans. (c)

8. 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
Ans: (a)

9.Virtual address are translated to physical
address by
(a)the process
(b)operating system
(d)All of the above
(e) None of the above

10.convert the hexadecimal number 0xFEDB to the
(a) 177333
ans: (a)

11. OLE is a mechanism
a)in UNIX for network communication
b)in INTERNET for communication between nodes
c)for communication between processes in a NT system
d)used as a network layer protocol in NT & Windows

12. an internet IP address of a node
a)has to be unique only for the domain of the node
b)has to be unique in the node’s sub-network
c)has to be unique in the country in which the node
is present
d)none of the above

13. There is an employee table with key feilds as
employer in every n’th row are needed for a
sample. Which of the following queries will get
required results.
a) select A employe no. from employe A , where
exists (select (max (emp_no)))from employe B
where A employe no. >= B employe having (count(*)
b) select employe no. from employe A, employe B
where A.employe no.>=B employ by employe
no.having(count(*) mod n)=0 )
c) both a& b
d)none of the above
ans: (d)

14. Type duplicates of a row in a table customer
non unique key feild customer no. can use
a) delete from costomer where customer no. exists(
select distinct customer no. from customer having
count )
b) delete customer a where customer no. in (select
cust_no from customer b where a.cust_no=b.cust_no)
c) delete customer a where custermor no. in ( select
customer no. from customer a, customer b group by
having (count(*)>1) and a.rowid>b.rowid);
d) none of the above

15.which of the following is a feature of the ANSI C
language and not present in Java?
a)forward referencing
b)variable length argument lists
c)volatile modifier
d)none of the above
ans: (b)