UGC NET Computer Science Solved Paper II - June 2009

The spacing between character pairs is called

 A.   Kerning

 B.   x-height

 C.   intercap

 D.   serif

            

The characteristic equation of a JK flip flop is

 A.   Q_n+1=J.Q_n+K.Q_n

 B.   Q_n+1=J.Q’_n+K’.Q_n

 C.   Q_n+1=Q_nJ.K

 D.   Q_n+1=(J+K)Q_n

            

In which addressing mode the operand is given explicitly in the instruction itself?

 A.   Absolute mode

 B.   Immediate mode

 C.   Indirect mode

 D.   Index mode

            

Any syntactic construct that can be described by a regular expression can also be described by a

 A.   Context sensitive grammar

 B.   Context sensitive grammar

 C.   Context free grammar

 D.   None of the above

            

What is the value of ‘b’ after the execution of the following code statements:
C=10;
B=++c+++c;

 A.   20

 B.   22

 C.   23

 D.   None

            

In order to implement a n variable switching function, a MUX must have

 A.   2ⁿ inputs

 B.   2ⁿ+1 inputs

 C.   2^n-1 inputs

 D.   2ⁿ-1 inputs

            

X.25 protocol consists of

 A.   Physical and Frame levels

 B.   Frame and Packet levels

 C.   Physical, Frame and Packet levels

 D.   None of the above

            

The linker

 A.   is similar to interpreter

 B.   uses source code as its input

 C.   is required to create a load module

 D.   none of the above

            

A clustering technique that permits a convenient graphical display is

 A.   partition based clustering

 B.   probabilistic model based clustering

 C.   hierarchical clustering

 D.   agglomerative clustering

            

A compiler that runs on one machine and produces code for a different machine is called

 A.   Cross compilation

 B.   One pass compilation

 C.   Two pass compilation

 D.   None of the above

            

We cannot delete the ---------- icon but we can made it invisible

 A.   Recycle

 B.   My Computer

 C.   Internet explorer

 D.   None of the above

            

E-commerce includes

 A.   B2C

 B.   B2B

 C.   C2C

 D.   All of the above

            

A reduced state table has 18 rows. The minimum number of flip flops needed to implement the sequential machine is

 A.   18

 B.   9

 C.   5

 D.   4

            

In order that a code is ‘t’ error correcting, the minimum Hamming distance should be

 A.   t

 B.   2t-1

 C.   2t

 D.   2t+1

            

Assume N segments in memory and a page size of P bytes. The wastage on account of internal fragmentation is

 A.   NP/2 bytes

 B.   P/2 bytes

 C.   N/2 bytes

 D.   NP bytes

            

Which of the following is used for test data generation?

 A.   White box

 B.   Black box

 C.   Boundary-value analysis

 D.   All of the above

            

Assertion(A): Bit maps are not often used in memory management.
Reason(R): Searching a bitmap for a run of given length is a slow operation.

 A.   Both (A) and (R) are true and (R) is correct explanation for (A)

 B.   Both(A) and (R) are true but (R) is not correct explanation for (A)

 C.   (A) is true (R) is false

 D.   (A) is false (R) is true

            

With a four programs in memory and with 80% average I/O wait, the CPU utilization is?

 A.   60%

 B.   70%

 C.   90%

 D.   100%

            

Suppose it takes 100 ns to access a page table and 20 ns to access associative memory with a 90% hit rate, the average access time equals:

 A.   20 ns

 B.   28 ns

 C.   90 ns

 D.   100 ns

            

Variable partition memory management technique with compaction results in

 A.   Reduction of fragmentation

 B.   Minimal wastage

 C.   Segment sharing

 D.   None of the above

            

Queue is a ----------- list.

 A.   LIFO

 B.   LILO

 C.   FILO

 D.   FIFO

            

Usually information security in a network is achieved by

 A.   Layering

 B.   Cryptography

 C.   Grade of service

 D.   None of the above

            

Which construct in SQL is used to test whether a subquery has any tuples in its result?

 A.   UNIQUE

 B.   EXISTS

 C.   GROUP BY

 D.   EXCEPT

            

The complete graph with four vertices has k edges where k is

 A.   3

 B.   4

 C.   5

 D.   6

            

The Fiber Distributed Data Interface uses:

 A.   single mode fibers and LEDs

 B.   multimode fibers and LEDs

 C.   single mode fibers and ILDs

 D.   multimode fibers and ILDs

            

After sending a message, the sender should not be able to, at a later date, deny having sent the message, is referred to as

 A.   Authenticity

 B.   Non-Repudiability

 C.   Auditability

 D.   Repudiability

            

The device which connects dissimilar LANs of different topologies using different sets of communication protocols so that information can flow from one to another is called

 A.   Router

 B.   Bridge

 C.   Gateway

 D.   Switch

            

When compared with analog cellular systems, an advantage of digital TDMA cellular system is that

 A.   it is less complicated

 B.   it requires less of computer memory

 C.   it conserves spectrum bandwidth

 D.   it costs less

            

he Boolean expression x’y’z+yz+xz is equivalent to

 A.   x

 B.   y

 C.   z

 D.   x+y+z

            

Which of the following changes permission to deny write permission to group and others?

 A.   Chmod go-w filex

 B.   Chmod go w filex

 C.   Chmod go=w file

 D.   None of the above

            

Which one of the following ISO standard is used for software process?

 A.   ISO 9000

 B.   ISO 9001

 C.   ISO 9003

 D.   ISO 9000-3

            

GSM/CDMA systems

 A.   are limited to very low speed data

 B.   are predominantly used for voice

 C.   are predominantly used for voice

 D.   all of the above

            

A binary tree is said to have heap property if the elements along any path

 A.   from leaf to root are non-increasing

 B.   from leaf to root are non-decreasing

 C.   from root to leaf are non-decreasing

 D.   from root to leaf are non-increasing

            

Which two of the following are equivalent for an undirected graph  G?
(i) G is a tree
(ii) There is at least one path between any two distinct vertices of G
(iii) G contains no cycles and has (n-1) edges
(iv)G has n edges

 A.   (i) and (ii)

 B.   (i) and (iii)

 C.   (i) and (iv)

 D.   (ii) and (iii)

            

The friend functions are used in situations where:

 A.   We want to have access to unrelated classes

 B.   Dynamic binding is required

 C.   Exchange of data between classes to take place

 D.   None of the above

            

The prepositional formula given by the tree

 A.   ^?x₂?x₁¬_x1¬x₁

 B.   (x₂?¬x₂)^(x₁?x₂)

 C.   (¬x₁?x₂)^(¬x₁?x₂)

 D.   None

            

Capability Maturity Model is meant for

 A.   Product

 B.   Process

 C.   Product and Process

 D.   None of the above

            

In a B tree of order m with p nodes the average number of splits is at most:

 A.   A

 B.   B

 C.   C

 D.   D

            

(i) DML includes a query language based on both relation algebra and tuple calculus
(ii) DML includes a query language based on tuple calculus
(iii) DML includes a query language based on relational algebra
(iv) DML includes a query language based on none of the relational algebra and tuple calculus
Which one is correct?

 A.   (i) only

 B.   (ii) only

 C.   (iii) only

 D.   (iv) only

            

Reverse engineering is the process which deals with

 A.   Size measurement

 B.   Cost measurement

 C.   Design recovery

 D.   All of the above

            

The octal equivalent of hexadecimal (A.B)16 is

 A.   47.21

 B.   12.74

 C.   12.71

 D.   17.21

            

Which of the following does not represent a valid storage class in ’c’?

 A.   automatic

 B.   static

 C.   union

 D.   extern

            

 In a full binary tree of height k, there are ----------- internal nodes.

 A.   2^k-1

 B.   2^k-1

 C.   2^k

 D.   2^k+1

            

There exists a construct which returns a value ‘true’ if the argument subquery is:

 A.   empty

 B.   non-empty

 C.   in error

 D.   none of the above

            

To employ multi-access in GSM, users are given different:

 A.   time slots

 B.   bandpass filters

 C.   andsets

 D.   frequency bands

            

In the light of software engineering software consists of

 A.   In the light of software engineering software consists of

 B.   Data

 C.   Documentation

 D.   All of the above