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Guess
Papers
(for
Class 1st Year) |
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Class
1ST YEAR Federal Board 2009
Paper:Computer Science (Objective Type) Time
Allowed: Max.Marks:
Note:Use this paper
to write the answers to the objective questions.No marks will be awarded
for cutting,over-writing
or using a pencil.This paper must be tagged with the answer-book.
1- Insert the correct option.
(i) What is the measure of a memory device's operating
speed called ?
(a)
Access time (b)
Cycle time
(c)
Write operation (d)
Read operation
(ii) Which of the following can convert the hard
copy of a document into soft copy ?
(a)
Plotter
(b) Scanner
(c)
Printer
(d) Drum plotter
(iii) The manager of a well-established multinational
company wants to buy a printer with excellent printer quality
Which of the following should she choose ?
(a)
Dot matrix printer (b)
Inkjet printer
(c)
Daisy wheel printer (d)
Laser printer
(iv) Which layer of the OSl modle enables two applications
to communicate across the network,
performing
security and name recognition functions ?
(a)
Transport layer (b)
Presentation layer
(c)
Session layer (d)
Application layer.
(v) What do we call the set of rules or agreement
among different parts of the network to transfer data ?
(a)
OSl modle (b)
Protocols
(c)
Network Topologies (d)
lSO Standard
(vi) In which modulation technique the voltage level is
constant but the carrier frequency is different for 1 to
0 ?
(a) Sine wave
modulation (b)
Phase modulation
(c)
Pulse modulation (d)
Frequency modulation
(vii) Which programs are responsible for carrying out the tasks
beyond the capabilities of the operating system
?
(a) System Programs
(b)
Utilities
(c)
Microsoft windows (d)
Operating environment
(viii) Which communication mode of transmission is shown by
the following figure ?
Transmitter---->
Medium----> Receiver
(a)
Simplex (b)
Half-Simplex
(c)
Duplex (d)
Half-Duplex
(ix) In which transmissin type the non-information
carrying start and stop bits are eliminated ?
(a)
Asynchronous transmission (b)
Syncchrnous transmission
(c)
Microwave transmission (d)
Satellite transmission.
(x) Bar code readers are used to directly
read UPC. What does UPC stand for ?
(a)
Uniform producation code (b)
Universe production code
(c)
Utility producation code (d)
Universal producation code.
(xi) What is the 16-bit register that controls the
sequence in which the instructions are fetched form memory,called
?
(a)
Progarm Counter (b)
Instruction Register
(c)
Data Access Register (d) Accumulator
(xii) The address bits of an instruction code can
also be used as the actual:
(a)
Operand (b)
Address
(c)
Operator (d)
Instruction
(xiii) What is the name of the special folder which
contains tools for customizing the windows environment
?
(a)
Internet explorer (b)
Control panel
(c)
Program files (d)
Windows
(xiv) Which is the major language of internet's
world wide web ?
(a)
WWW (b)
HTTP
(c)
HTML (d)
TCP/lP
(xv) What is the process of using mathematical
description of a real system in the form of computer program
called ?
(a)
Simulation (b)
Encryption
(c)
Coding (d)
Animation
2. Attempt any THIRTEEN
parts (13 x 3 = 39)
(i) How does l/O processor save
CPU time ?
(ii) How does character recognition software
work ?
(iii) Define the following briefly:
(a)
Read / Write Memory (RWM)
(b)
Read Only Memory (ROM)
(iv) You have to submit the printed copy of
your assignment but the only printer at home is attached with
your father's computer.Your computer is connected with your father's
computer by networking How
will you print your assignment with borrowing the printer ?
(v) What is the use of recycle bin ?
(vi) How is E-Commerce advantageous in modren
business ? Give three reasons.
(vii) Briefly described the use of computer simulation.
(viii) Differentiate between synchronous and asynchronous
transmission. Give only three important differences.
(ix) Described the function of following register
in two to three lines each:
(a)
Instruction Register (b)
Accumulator Register
(x) Define computer virus and give two
precautionary measures to save your data from virus programs.
(xi) Give two features of non-existent virus.
Are they equally dangerous like existent virus ?
(xii) Write and explain three data protection
principles.
(xiii) Multitasking is an important feature of windows
operating system. How ?
(xiv) (a) Write a distinctive feature of peer-to-peer
network.
(b)
Write a disadvantage of Ring topology.
(xv) What is the unit of data communication
speed ? Name two categories of grades of channels.
(xvi) Compare internet email address with
URL's Give one example of each.
(xvii) Give therr reasons why flat screen monitors
are becoming more popular than conventional CRT monitors.
Attempt
any Three queations. (3 x 7 = 21)
(3) Explain the following layers of
OSl modle:
(a)Physical Layer
(b) Data Link Layer
(c) Network Layer
(d) Transport Layer.
(4) You are give an assignment by your
teacher. You have 25 computers,one printer,one scanner and one
hub for your computer lab. Which topology will you use to establish
a network ? Give four reasons
for your choice. How will you manage the availability of printer and
scanner to all the students
on different computers ?
(5) (a) What is data protection act
/ State its clauses.
(b) How is this act violated by the people ?
(6) What are the basic elements of data
communication system ? How is data communicated by using telephone
lines ? How is data communicated by using telephone lines ? How is
analog data converted
into digital data ? |
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