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July 1st, 2014, 04:41 PM
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Join Date: Mar 2012
Re: NET exam computer science question papers

This is the NET exam computer science question paper:

1. Any integer composed of 3n
identical digits divisible by
(A) 2n (B) 3n
(C) 5n (D) 7n
2. The circumference of the two
concentric disks are divided into 100
sections each. For the outer disk, 100
of the sections are painted red and
100 of the sections are painted blue.
For the inner disk, the sections are
painted red and blue in an arbitrary
manner. It is possible to align the
two disks so that
(A) 100 or more
(B) 125 or more
(C) 150 or more
(D) 175 or more
of the sections on the inner disks
have their colours matched with the
corresponding section on outer disk.
3. The proposition ~ p q is equivalent
(A) p q
(B) q p
(C) p q
(D) p q
4. The absorption law in Boolean
algebra say that
(A) X + X = X
(B) X . X = X
(C) x + x . y = x
(D) None of the above
5. The number of 1’s present in the
binary representation of
10 × 256 + 5 × 16 + 5 is
(A) 5 (B) 6
(C) 7 (D) 8
6. The hexadecimal number equivalent
to (1762.46)8 is
(A) 3F2.89
(B) 3F2.98
(C) 2F3.89
(D) 2F3.98
7. (A + B)
AB is equivalent to
(A) A B
(B) A u B
(C) (A B) u A
(D) (A u B) A
8. A latch is constructed using two
(A) AND and OR gates
(B) AND gates
(C) NAND and NOR gates
(D) NAND gates
9. A multiplexer is a logic circuit that
(A) accepts one input and gives
several output
(B) accepts many inputs and gives
many output
(C) accepts many inputs and gives
one output
(D) accepts one input and gives
one output
10. 8-bit 1’s complement form of –77.25
(A) 01001101.0100
(B) 01001101.0010
(C) 10110010.1011
(D) 10110010.1101
11. From the point of view of the
programmer, what are the major
advantages of using a high-level
language rather than internal
machine code or assembly
language ?
(A) Program portability
(B) Easy development
(C) Efficiency
(D) None of the above
12. What features make C++ so
powerful ?
(A) Easy implementation
(B) Reusing old code
(C) Easy memory management
(D) All of the above
13. The goal of operator overloading is
(A) to help the user of a class
(B) to help the developer of a class
(C) to help define friend function
(D) None of the above
14. The scheme of which interpreter
translates the source program is
known as
(A) Paragraph by paragraph
(B) Instruction by instruction
(C) Line by line
(D) None of the above
15. Portable program means
(A) Program with wheels
(B) Independent from its authors
(C) Independent of platform
(D) None of the above
16. Which of the following is the
recovery management technique in
(A) 2PC (Two Phase Commit)
(B) Backup
(C) Immediate update
(D) All of the above
17. Which of the following is the
process by which a user’s privileges
ascertained ?
(A) Authorization
(B) Authentication
(C) Access Control
(D) None of these
18. The basic variants of time-stampbased
method of concurrency control
(A) Total time stamp-ordering
(B) Partial time stamp ordering
(C) Multiversion Time stamp
(D) All of the above
19. A transaction can include following
basic database access operations :
(A) Read_item(X)
(B) Write_item(X)
(C) Both (A) and (B)
(D) None of these
20. Decomposition help in eliminating
some of the problems of bad design
(A) Redundancy
(B) Inconsistencies
(C) Anomalies
(D) All of the above
21. The number of different trees with 8
nodes is
(A) 256
(B) 255
(C) 248
(D) None of these
22. Given a binary tree whose inorder
and preorder traversal are given by
The post order traversal of the above
binary tree is
23. The number of disk accesses
performed by insertion operation in
B-tree of height h is
(A) 0(1)
(B) 0(1gh)
(C) 0(h)
(D) None of these
24. Consider a hash table of size
m = 10000 and the hash function
h(k) = m (kA mod 1) ' for
A =
( 5 – 1)
. The location to the
key k = 123456 is
(A) 46 (B) 47
(C) 41 (D) 43
25. When the priority queue is
represented by max heap, the
insertion and deletion of an element
can be performed in (queue
containing n elements)
(A) (n) and (1) respectively
(B) (n) and (n) respectively
(C) (1) and (1) respectively
(D) None of the above
26. A comparison of frequency division
and time division multiplexing
system shows that
(A) FDM requires a lower
bandwidth, but TDM has
greater noise immunity.
(B) FDM has greater noise
immunity and requires lower
bandwidth than TDM.
(C) FDM requires channel
synchronization, while TDM
has greater noise immunity.
(D) FDM requires more multiplex
while TDM requires band pass
27. If carrier modulated by a digital bit
stream, has one one of the possible
phase of 0, 90, 180 and 270 degrees,
then modulation called
28. Consider the following statement :
(i) The bandwidth of the A.M.,
wave depends on the band
width of the modulating signal.
(ii) The bandwidth of the A.M.,
wave depends on the
modulation index.
(iii) The bandwidth of the F.M,
wave for all practical purpose
depends on the amplitude of
the carrier.
Of these statements the correct
statements are
(A) (i, ii)
(B) (i, iii)
(C) (ii, iii)
(D) All of the above
29. A smart modem can dial, hangup
and answer incoming calls
automatically. Can you tell who
provides the appropriate instructions
to the modem for this purpose ?
(A) Communication software
(B) Error detection protocols
(C) Link access procedure (LAP)
(D) Telecommunications
30. Which of the following switching
techniques is most suitable for
interactive traffic ?
(A) Circuit switching
(B) Message switching
(C) Packet switching
(D) All of the above
31. Object modules generated by
assembler that contains unresolved
external references are resolved for
two or more object module by a/an
(A) Operating system
(B) Loader
(C) Linker
(D) Compiler
32. A special software that is used to
create a job queue is called
(A) Drive
(B) Spooler
(C) Interpreter
(D) Linkage editor
33. Which of the following permanent
database that has an entry for each
terminal symbol ?
(A) Literal table
(B) Identifier table
(C) Terminal table
(D) Source table
34. In which way(s) a macroprocessor
for assembly language can be
implemented ?
(A) Independent two-pass processor
(B) Independent one-pass processor
(C) Expand macrocalls and
substitute arguments
(D) All of the above
35. Which of the following can be
accessed by transfer vector approach
of linking ?
(A) External data segments
(B) External subroutine
(C) Data located in other
(D) All of the above
36. Block or Buffer caches are used to
(A) improve disk performance
(B) handle interrupts
(C) increase the capacity of main
(D) speed up main memory Read
37. A file organization component
VSAM file is
(A) Relative records data set
(B) Keyed sequential data set
(C) Entry sequential data set
(D) All of the above
38. A relationship between processes
such that each has some part (critical
section) which must not be executed
while the critical section of another
is being executed, is known as
(A) Semaphore
(B) Mutual exclusion
(C) Multiprogramming
(D) Message passing
39. How many states can a process be
in ?
(A) 3 (B) 4
(C) 2 (D) 5
40. Which command allows you to view
your file 24 lines at a time ?
(A) More
(B) Cat
(C) Pg
(D) None of the above
41. Which one of the items listed below
is not one of the software
engineering layers ?
(A) Process
(B) Manufacturing
(C) Method
(D) Tools
42. What is the first stage in program
development ?
(A) Specification and design
(B) System Analysis
(C) Testing
(D) None of the above
43. By means of a data flow diagram,
the analyst can detect
(A) Task duplication
(B) Unnecessary delays
(C) Task overlapping
(D) All of the above
44. Which of these are the 5 generic
software engineering framework
activities ?
(A) Communication, planning,
modelling, construction,
(B) Communication, risk
management, measurement,
production, reviewing
(C) Analysis, designing,
programming, Debugging,
(D) Analysis, planning, designing,
programming, testing
45. Many causes of the software crisis
can be traced to mythology based on
(A) Management Myths
(B) Customer Myths
(C) Practitioner Myths
(D) All of the above
46. Data warehousing refers to
(A) storing data offline at a
separate site
(B) backing up data regularly
(C) is related to data mining
(D) uses tape as opposed to disk
47. Virtual memory is
(A) related to virtual reality
(B) a form of ROM
(C) a form of RAM
(D) None of the above
48. “M-Commerce” refers to
(A) a myth which does not exist in
(B) the ability of business to reach
potential customers wherever
they are
(C) the ability to have large
capacity of memory storage
dealing trade and commerce
(D) None of the above
49. The principal electronic payment
systems for electronic commerce is
(A) Credit Card
(B) Digital Wallet
(C) Electronic Cheque
(D) All of the above
50. Which is the most valuable
electronic commerce to the
individual customer in long run ?
(A) Business to Customer
(B) Business to Business
(C) Customer to Customer
(D) None of the above

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