CHIU LUT SAU MEMORIAL SECONDARY SCHOOL 2008 2009 First Term Examination

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0809
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Exam1
-
B


P.
1


CHIU LUT SAU MEMORIAL SECONDARY SCHOOL

200
8


200
9

First
Term
Examination


Computer and Information Technology

Section B


Secondary Four

.

Examination Day: 10

Time:
8
:
35

a.m.

-

9
:
35

a.m
.

Date:
16
-
01
-
200
9

Max. Mark:
60

(
Section B
)


Question
-
Answer Book


Name:





Class:

( )







Instructions

1.

Write your Name, Class, Class number in the spaces
provided on this page. Also write down the information
on
each

page of
supplementary
answer sheets
, if any
.


2.

Answer all questions in this question
-
an
swer book.





Marks


Q.1

/

20


Q.2

/

20


Q.3

/

20


Total:

/ 60
























Section A

/ 40



Section B

/ 60



Total:

/ 100


0809
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Exam1
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P.
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1.

Mr. Wong wants to introduce e
-
learning for his students for self
-
study at home.

a)

Mr. Wong has two differ
ent plans:

Plan 1: Materials are saved into a DVD
-
ROM disk

Plan 2: Materials are uploaded to a web site

i.

State ONE advantage of Plan 1 over Plan 2.

(2 marks)




ii.

State ONE advantage of Plan 2 over Plan 1.

(2 marks)




b)

Give ONE advantage of e
-
learning w
hen compared to self
-
study by books or notes.

(2 marks)




c)

Give ONE disadvantage of e
-
learning when compared to self
-
study by books or notes.

(2 marks)




d)

Mr. Wong wants to record some video as teaching materials. Name TWO input devices that he
may
need.

(2 marks)





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The

One Laptop Per Child


(OLPC)
project
was initiated

several years ago to combat the problem of
digital divide
.

Lower
-
cost notebook computers with wireless network

capability are sold to poor countries or areas for the

children
to use at school.





(Image source:
http://laptop.org/
)

e)

Briefly explain the meaning of

Digital Divide

.

(4 marks)








f)

The HKSAR Government has been developing e
-
government (electronic government). More
and more public services are now availabl
e on the web.

i.

Give TWO examples of online public services.

(2 marks)



ii.

Give ONE advantage for providing online public services for citizens.

(2 marks)



g)

The HKSAR Government has also developed Smart ID Card, which has a chip inside for storing
personal

information. State TWO pieces of personal information stored in the chip.

(2 marks)




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2.

Judy
likes 3D games very much.

However, sh
e finds that
her

computer is too old for playing games,
so
s
he want
s

to
upgrade her video card
.

When
s
he goes to a compu
ter shop, the salesperson
recommends two
video

card
s

to
her
. The specifications are listed below:


Video Card X

Video Card Y

GPU

300MHz

500MHz

Video RAM

256MB

512MB

Data Bus

PCI
-
Express

PCI
-
Express


a)

Give a function of GPU (Graphics Processing Unit).

(
2 marks)



b)

Give a function of Video RAM (Random Access Memory).

(2 marks)



c)

Which video card, X or Y, has better performance? Give TWO reasons.

(5 marks)








d)

Briefly explain the function of

data

bus”

(2 marks)




e)

Judy

s motherboard provi
des only AGP (Accelerated Graphics Port) data bus for video cards.
However, newer video cards do not support AGP anymore, and they support PCI
-
Express instead.
Give ONE reason for this change.

(2 marks)




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Judy decides to replace the whole computer in
cluding CPU, RAM, hard disk, video card, and
monitor.

f)

She is considering buying an LCD monitor or a CRT monitor. State ONE advantage and ONE
disadvantage of LCD monitor.

(4 marks)







g)

State ONE specification of monitor that is important for the sm
oothness of playing games and
videos.

(1 mark)



Judy decides to buy an LCD monitor of resolution 1280 x 1024.

h)

After she has installed the operating system, she finds that the resolution of the screen cannot be
adjusted to higher than 800 x 600. Give ONE

possible reason related to software.

(2 marks)





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3.

Peter has bought a new computer.

a)

He is considering two different operating systems:












i.

What user interface
s

are
OS
-
A
and OS
-
B
using?

(
2

mark
s
)

OS
-
A:


OS
-
B:


ii.

Give
ONE

advantage of the user in
terface of OS
-
B
over that of OS
-
A
.

(
2

marks)




iii.

Give
ONE

advantage of the user interface of OS
-
A

over that of OS
-
B
.

(
2

marks)




b)

Modern OS supports “multi
-
tasking”. While
a

CPU can only execute one instruction at a time,

the CPU is apparently runn
ing multiple tasks at the same time.

Explain briefly the working
mechanism of

multi
-
tasking

.

(4 marks)







Figure 1: OS
-
A

Figure 2: OS
-
B

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c)

Peter

has read

an article about “virtual memory”
.








Peter thinks that he can buy less RAM because he can use more hard disk space fo
r virtual
memory. However, his friend Alice tells him that this will lower the performance of the
computer. Give TWO reasons to support Alice

s opinion.

(4 marks)







d)

There are some utility programs enhancing the operating system. State TWO name
s of utility
programs. For each
of
utility program
s

stated, describe its functionality

briefly
.

(4 marks)









e)

Peter cannot save a file into a floppy disk. State ONE reason for the problem.

(2 marks)




~ End of Section B ~




Virtual memory is a technique to
use some hard disk space to extend the main
memory
, so that apparently there is more memory to use.



When there is not enough memory storage, least
-
frequently
-
used data are stored into the
hard disk.



When the data in the virtual memory is needed again, it is then moved from the hard disk
to the main memory.