COMPUTER SCIENCE AND APPLICATIONS

1. The postfix expression AB + CD – *

can be evaluated using a

(Ans.) stack

(B) tree

(C) queue

(D) linked list

2. The post order traversal of a binary

tree is DEBFCA. Find out the preorder

traversal.

(A) ABFCDE

(B) ADBFEC

(Ans.) ABDECF

(D) None of the above

3. The branch logic that provides making

capabilities in the control unit is known

as

(Ans.) Controlled transfer

(B) Conditional transfer

(C) Unconditional transfer

(D) None of the above

4. The number of colours required to

properly colour the vertices of every

planer graph is

(Ans.) 2

(B) 3

(C) 4

(D) 5

5. Networks that use different

technologies can be connected by

using

(A) Packets

(B) Switches

(C) Bridges

(Ans.) Routers

6. Both hosts and routers are TCP/IP

protocol software. However, routers do

not use protocol from all layers. The

layer for which protocol software is not

needed by a router is

(Ans.) Layer – 5 (Application)

(B) Layer – 1 (Physical)

(C) Layer – 3 (Internet)

(D) Layer – 2 (Network Interface)

7. In multiuser database if two users wish

to update the same record at the same

time, they are prevented from doing so

by

(A) Jamming

(B) Password

(C) Documentation

(Ans.) Record lock

8. A binary search tree is a binary tree :

(A) All items in the left subtree are

less than root

(B) All items in the right subtree are

greater than or equal to the root

(C) Each subtree is itself a binary

search tree

(Ans.) All of the above

9. What deletes the entire file except the

file structure ?

(A) ERASE

(B) DELETE

(Ans.) ZAP

(D) PACK

10. Which command is the fastest among

the following ?

(A) COPY TO <NEW FILE>

(Ans.) COPY STRUCTURE TO <NEW

FILE>

(C) COPY FILE <FILE 1> <FILE 2>

(D) COPY TO MFILE-DAT

DELIMITED

11. B+ tree are preferred to binary tree in

Database because

(A) Disk capacity are greater than

memory capacities

(Ans.) Disk access is much slower than

memory access

(C) Disk data transfer rates are much

less than memory data transfer

rate

(D) Disks are more reliable than

memory

12. A Transaction Manager is which of the

following ?

(A) Maintains a log of transactions

(B) Maintains before and after

database images

(C) Maintains appropriate concurrency

control

(Ans.) All of the above

13. Leaves of which of the following trees

are at the same level ?

(A) Binary tree

(Ans.) B-tree

(C) AVL-tree

(D) Expression tree

14. Which of the following TCP/IP

Internet protocol is diskless machine

uses to obtain its IP address from a

server ?

(A) RAP

(B) RIP

(Ans.) ARP

(D) X.25

15. Decryption and encryption of data are

the responsibility of which of the

following layer ?

(A) Physical layer

(B) Data Link layer

(Ans.) Presentation layer

(D) Session layer

16. In which circuit switching, delivery of

data is delayed because data must be

stored and retrieved from RAM ?

(A) Space division

(Ans.) Time division

(C) Virtual

(D) Packet

17. In which Routing Method do all the

routers have a common database ?

(A) Distance vector

(Ans.) Link state

(C) Link vector

(D) Dijkestra method

18. Page Shift Keying (PSK) Method is

used to modulate digital signal at

9600 bps using 16 level. Find the line

signals and speed (i.e. modulation

rate).

(Ans.) 2400 bauds (B) 1200 bauds

(C) 4800 bauds (D) 9600 bauds

19. The station to hub distance in which it

is 2000 metres.

(A) 100 Base-Tx

(Ans.) 100 Base-Fx

(C) 100 Base-T4

(D) 100 Base-T1

20. Main aim of software engineering is to

produce

(A) program

(B) software

(C) within budget

(Ans.) software within budget in the

given schedule

21. Key process areas of CMM level 4 are

also classified by a process which is

(A) CMM level 2

(B) CMM level 3

(Ans.) CMM level 5

(D) All of the above

22. Validation means

(A) are we building the product right

(Ans.) are we building the right product

(C) verification of fields

(D) None of the above

23. If a process is under statistical control,

then it is

(A) Maintainable

(B) Measurable

(Ans.) Predictable

(D) Verifiable

24. In a function oriented design, we

(A) minimize cohesion and maximize

coupling

(Ans.) maximize cohesion and minimize

coupling

(C) maximize cohesion and

maximize coupling

(D) minimize cohesion and minimize

coupling

25. Which of the following metric does not

depend on the programming language

used ?

(A) Line of code

(Ans.) Function count

(C) Member of token

(D) All of the above

26. A / B+ tree index is to be built on the

name attribute of the relation

STUDENT. Assume that all students

names are of length 8 bytes, disk block

are of size 512 bytes and index

pointers are of size 4 bytes. Given this

scenario what would be the best choice

of the degree (i.e. the number of

pointers per node) of the B+ tree ?

(Ans.) 16 (B) 42

(C) 43 (D) 44

27. The Inorder traversal of the tree will

yield a sorted listing of elements of

tree in

(A) Binary tree

(Ans.) Binary search tree

(C) Heaps

(D) None of the above

28. Mobile IP provides two basic

functions.

(A) Route discovery and registration

(Ans.) Agent discovery and registration

(C) IP binding and registration

(D) None of the above

29. Pre-emptive scheduling is the strategy

of temporarily suspending a gunning

process

(Ans.) before the CPU time slice expires

(B) to allow starving processes to run

(C) when it requests I/O

(D) to avoid collision

30. In round robin CPU scheduling as time

quantum is increased the average turn

around time

(A) increases

(B) decreases

(C) remains constant

(Ans.) varies irregularly

31. Resources are allocated to the process

on non-sharable basis is

(Ans.) mutual exclusion

(B) hold and wait

(C) no pre-emption

(D) circular wait

32. Cached and interleaved memories are

ways of speeding up memory access

between CPU’s and slower RAM.

Which memory models are best suited

(i.e. improves the performance most)

for which programs ?

(i) Cached memory is best suited for

small loops.

(ii) Interleaved memory is best

suited for small loops

(iii) Interleaved memory is best

suited for large sequential code.

(iv) Cached memory is best suited for

large sequential code.

(A) (i) and (ii) are true.

(Ans.) (i) and (iii) are true.

(C) (iv) and (ii) are true.

(D) (iv) and (iii) are true.

33. Consider the following page trace :

4,3, 2, 1, 4, 3, 5, 4, 3, 2, 1, 5

Percentage of page fault that would

occur if FIFO page replacement

algorithm is used with number of

frames for the JOB m = 4 will be

(A) 8

(B) 9

(Ans.) 10

(D) 12

34. Check sum used along with each

packet computes the sum of the data,

where data is treated as a sequence of

(A) Integer

(Ans.) Character

(C) Real numbers

(D) Bits

35. If an integer needs two bytes of

storage, then the maximum value of a

signed integer is

(A) 216 – 1

(Ans.) 215 – 1

(C) 216

(D) 215

36. Which of the following logic families

is well suited for high-speed operations ?

(A) TTL

(Ans.) ECL

(C) MOS

(D) CMOS

37. Interrupts which are initiated by an

instruction are

(A) Internal

(B) External

(Ans.) Hardware

(D) Software

38. printf(“%c”, 100);

(A) prints 100

(Ans.) prints ASCII equivalent of 100

(C) prints garbage

(D) none of the above

39. For the transmission of the signal,

Bluetooth wireless technology uses

(A) time division multiplexing

(B) frequency division multiplexing

(Ans.) time division duplex

(D) frequency division duplex

40. Consider the following statements :

I. Recursive languages are closed

under complementation.

II. Recursively enumerable languages

are closed under union.

III. Recursively enumerable languages

are closed under complementation.

Which of the above statements are true ?

(A) I only

(Ans.) I and II

(C) I and III

(D) II and III

41. What is the routing algorithm used by

RIP and IGRP ?

(A) OSPF

(B) Link-state

(C) Dynamic

(Ans.) Dijkestra vector

42. Identify the incorrect statement :

(A) The overall strategy drives the

E-Commerce data warehousing

strategy.

(B) Data warehousing in an

E-Commerce environment should

be done in a classical manner.

(C) E-Commerce opens up an

entirely new world of web

server.

(Ans.) E-Commerce security threats can

be grouped into three major

categories.

43. Reliability of software is directly

dependent on

(A) quality of the design

(Ans.) number of errors present

(C) software engineers experience

(D) user requirement

44. ______ is not an E-Commerce

application.

(A) House banking

(B) Buying stocks

(C) Conducting an auction

(Ans.) Evaluating an employee

45. ______ is a satellite based tracking

system that enables the determination

of person’s position.

(A) Bluetooth

(B) WAP

(C) Short Message Service

(Ans.) Global Positioning System

46. A complete microcomputer system

consists of

(A) Microprocessor

(B) Memory

(C) Peripheral equipment

(Ans.) All of the above

47. Where does a computer add and

compare data ?

(A) Hard disk

(B) Floppy disk

(Ans.) CPU chip

(D) Memory chip

48. Pipelining strategy is called implement

(A) instruction execution

(Ans.) instruction prefetch

(C) instruction decoding

(D) instruction manipulation

49. Which of the following data structure

is linear type ?

(A) Strings

(B) Lists

(C) Queues

(Ans.) All of the above

50. To represent hierarchical relationship

between elements, which data structure

is suitable ?

(A) Dequeue

(B) Priority

(Ans.) Tree

(D) All of the above