JUNIOR SECONDARY CERTIFICATE
COMPUTER STUDIES
1502/1
PAPER − Written
2 hours 30 minutes
Marks 130
2013
Additional Materials: Answer book
Multiple choice answer sheet
INSTRUCTIONS AND INFORMATION TO CANDIDATES
•
Write your Candidate Number and Name in the spaces on the separate answer book provided.
•
Write in dark blue or black pen.
•
You may use a soft pencil for any rough work, diagrams or graphs.
•
Do not use correction fluid.
•
Answer all questions.
•
Make sure that you receive the multiple choice answer sheet with your examination
number on it to answer Section A.
•
The number of marks for section B is given in brackets [ ] at the end of each question or
part question.
This document consists of 17 printed pages and 1 blank page.
Republic of Namibia
MINISTRY OF EDUCATION
©MoE/DNEA
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SECTION A
•
All the questions in this section must be answered on the answer sheet provided.
•
Use soft pencil only.
•
There are four possible answers, A, B, C and D, for each question.
•
Choose the one you consider correct and mark your answer on the answer sheet.
•
If you wish to change an answer erase the one you wish to delete completely with
a soft eraser.
•
Each question counts one mark.
1
The location on a windows operating system where all the deleted files are stored is
A my computer.
B my documents.
C the recycle bin.
D the task bar.
2
When you draw a plan of a house, you would make use of the following software
A database
B computer aided design
C computer graphics
D spreadsheet
3
In which of the following is batch processing used?
A booking a holiday
B checking stolen vehicles
C controlling of traffic lights
D producing a company’s payroll
4
Virtual memory is
A an extremely large main memory.
B an extremely large secondary memory.
C an illusion of extremely large main memory.
D a type of memory used in super computers.
5
Multiprogramming systems
A are easier to develop than single programming systems.
B are used only on large main frame computers.
C execute each job faster.
D run several programs at the same time.
6
An example of the components of a multimedia presentation could include
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A CD-ROM, digital camera, sound.
B text, graphics, e-mail addresses.
C text, hypertext, Power Point.
D text, video, sound.
7
When you send e-mail your e-mail can be set to automatically keep a copy. Where
can you find these copies?
A Drafts
B Inbox
C Sent items
D Trash
8
Which of the following is not an example of an operating system?
A MS Office 2003
B Linux
C Unix
D Windows 7
9
The errors that can be pointed out by the compiler are
A internal errors.
B logical errors.
C symatic errors.
D syntax errors
10 When we open the Internet site we see www. What is the full form of www?
A word wild word
B word wide web
C world wide web
D word winging works
11 Which of the following commands is given to show the task manger?
A Ctrl + Alt + Shift
B Ctrl + Alt + Del
C Ctrl + Alt + Tab
D Ctrl + shift + Del
12 The blinking symbol on the computer screen is called the
A cursor.
B hand.
C logo.
D mouse.
13 By default your document prints in … mode.
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A landscape
B portrait
C page setup
D print preview
14 Magnetic disk is a medium that uses
A direct access.
B rotational access.
C serial access.
D sequential access.
15 A temporary storage area, compensating for different speeds of devices is called
A buffer.
B channel.
C register.
D spool.
16 A program that allows the user to search for and view data on the Internet is called a
A browser.
B protocol.
C Netscape.
D index.
17 Which one of the following devices is used for audio input?
A microphone
B MICR
C scanner
D speaker
18 Which key should be pressed to delete the character to the left of the cursor position?
A backspace
B del
C home
D shift
19 Which of the following is not a pointing device?
A mouse
B LCD display
C trackball
D touch pad
20 The difference between RAM and hard disk is that RAM is … and hard disk is ...
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A fast ... slow
B permanent ... temporary
C slow ... fast
D temporary ... permanent
21 Which of the following holds the ROM, CPU and RAM?
A Hard drive
B Interface board
C Memory stick
D Mother board
22 The language that the computer can understand and execute is called
A machine language.
B program language.
C system program.
D source code.
23 CAD systems use the ... for printing drawings on A1 size paper.
A dot matrix printer
B digital plotter
C thermal printer
D laser printer
24 The word length of a computer is measured in
A bytes.
B digits.
C hertz.
D meters.
25 To find and load a file that has been saved, select the
A close command.
B new command.
C open command.
D save command.
26 Which of the following describes a relational database?
A It consists of separate tables or related data.
B It provides relationships between integers.
C It provides relationships between worksheets.
D It retrieves data related to its queries.
27 ATM stands for
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A Automatic Time Market.
B Automatic Teller Market
C Automatic Teller Machine.
D Automatic Time Machine.
28 Programs which are written to do a specific job, in a one-off application, are called
A custom-designed software.
B generic software.
C system software.
D service programs.
29 Which piece of hardware protects the resource of a private network from users from
other networks?
A cache server
B firewall
C proxy server
D router
30 Where is the Internet’s central hub and control centre located?
A Nowhere, the Internet has no central hub
B New York
C Switzerland
D Silicon valley
[30]
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SECTION B
1
Explain, using examples where appropriate, the meaning of the following
computer terms.
(a) virus
[2]
(b) handshaking
[2]
(c) validation
[2]
(d) graphical user interface
[2]
(e) bar code
[2]
[10]
2
(a) How do you create a shortcut for a program on your desktop? [2]
(b) Why is it important that you shut down your computer from the start menu as
opposed to just turning off the power using the power button?
[1]
(c) An operating system allows you to keep order on your hard drive. Mention a
tool which the operating system supplies you with, to keep order. [1]
(d) Seemingly doing two activities at the same time on your computer is called
multi-tasking/multi-access. Choose the correct answer.
[1]
(e) Which utility would you use to do the following:
(i) change the name of a file
[2]
(ii) make an exact copy of a file to a flash stick
[2]
(iii) remove a file from the hard drive
[2]
(iv) remove a program from the hard drive
[2]
(v) organise the contents of your hard drive
[2]
[10]
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3
A builder needs to find out the cost of tiling floors of a new building. The building
consists of a number of rooms of different sizes. The owner could choose between
two different tiles.
A
1
2
B
C
D
E
F
G
QUOTE OF TILES TO BE LAID IN NEW BUILDING
3
Cost of tile Tile 1
4
Tile 2
H
per
square meter
per
20.00
square meter
15.00
5
6
Length breadth
7
8
9
10
11
12
Room 1
Room 2
Room 3
Room 4
Room 5
Total
5
7
2
5
4
Area
3
4
2
3
7
Tile Option
15
28
4
15
28
1
1
2
2
1
Prize
225.00
420.00
80.00
300.00
420.00
1445.00
(a) Write down a cell which consists of a value.
[1]
(b) Write down a cell which consists of a label.
[1]
(c) Write down the formula of the following cells.
(i) E7
(ii) G7
(iii) G12
[6]
(d) How can the formula of cell E7 be copied into cells E8 to E11.
(e) What editing has been done to column G?
[1]
[1]
[10]
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4
The following is an extract of the database of a company hiring out camping equipment.
Product table
ID
Product Name Description
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
Camping chair
Camping chair
Camping chair
Table
Table
Table
Tent
Tent
Tent
Tent
Quantity
Purchase date
Green-canvas
Green with armrest
Blue - canvas
Metal - square
Aluminum
Metal - rectangle
2 - man
4 - man
6 - man
with veranda
20
10
10
5
5
4
6
4
3
5
date
2001-03-16
2005-07-20
2005-10-20
2004-02-15
2002-08-15
2010-10-10
2006-06-15
2009-06-28
2010-02-15
2001-08-17
Transaction table
ID
Transaction
Company ID
A6
A1
A9
A3
A2
A1
A7
A9
A6
Rent out
Rent out
Rent out
Rent out
Loan out
Returned
Rent out
Rent out
Returned
Hia
Hia
Alo
Alo
Afr
Hia
Bus
Bus
Hia
Quantity
2
8
2
6
5
8
4
1
2
2013-01-05
2013-01-05
2013-01-05
2013-01-05
2013-01-08
2013-01-10
2013-01-10
2013-01-10
2013-01-10
Company table
Company ID Name
Afr
African car hire
Bus
Alo
Hia
Busy camping
Aloe bush camp
Hiab river camp
Address
P.O. Box 1121
Windhoek
P.O. Box 54 Kamanjab
P.O. Box 553 Rundu
P.O. Box 3243
Windhoek
Phone
(061) 265265
(063) 270536
(066) 255831
(061) 251195
(a) Name the primary key field of the Product table.
[1]
(b) Name two advantages of splitting up databases as in this example.
[2]
(c) Which product(s) did the company Busy camping rent.
[2]
(d) Write down the query to get a list of products purchased before 2005.
[2]
(e) Write down the instructions to get a list of camping chairs only.
[2]
(f) Which field can be used to link the Company table with the Transaction table?
[1]
[10]
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5
Read the following extract about a young lady from India and then answer the
questions that follow.
“Most people of my age today in India literally live online,” says Seeya Malhotra as
she unwraps a box that has been delivered to her desk at work.
The box contains a set of desk speakers which she had ordered on the internet a
few days before.
Buying items at the click of a button is the way Seeya shops these days - she says
almost half of her wardrobe has been purchased online, as well as her lunch and
many other things.
(a) What does this article mean when referring to ‘purchasing online’?
[1]
(b) Define the word internet.[1]
(c) How would Seeya pay for the products she had purchased ‘online’?
[1]
(d) Mention one drawback of online payments.
[1]
(e) One of the problems associated with the internet is security. It is very easy to
download viruses from the internet.
Explain how this can be prevented. Not using the internet is NOT an option.
[2]
[6]
6
A supermarket uses point-of-sale terminals.
(a) In what order should the following steps be carried out at the terminal when an
item is being purchased.
•
Look up price
•
Input item code
•
Workout change
•
Input money given
[4]
(b) Name two methods of entering the item code at the terminal
[2]
(c) The record for each item on the computer file contains its price and the number
left in stock. State the change that should be made to this record when an item is sold.
[2]
(d) Explain what is meant by a real-time system. [2]
(e) Point-of-sale system is a real-time system.
Explain why this is a real-time system?
[1]
(f) The terminals are linked with a bus network.
Draw a labelled diagram of a bus network.
[4]
[15]
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7
A Grade 10 class wants to go on a geography excursion to the Spitzkoppe area.
Information is needed concerning accommodation in that region. Someone suggests
to use the internet to find the information.
(a) Suggest keywords to search for accommodation near the Spitzkoppe.
[2]
(b) Learners need to find more information on the geomorphology of the Spitzkoppe. They decide to use the internet to search for information.
Mention one advantage of using the internet to search for the information and
one disadvantage of using the internet.
[2]
(c) The teacher sees that the website is a https site. What does the s in https mean? [1]
(d) The teacher needs to draw up a budget to find out how much the trip will cost.
Which program will the teacher use to work out the budget?
8
[1]
[6]
A calculator uses a 7-bit display as output.
a
b
f
g
c
e
d
Data is coded 0 for off and 1 for on. For example the digit three is
a
1
b
1
c
1
d
1
e
0
f
0
g
1
a
b
f
g
c
e
d
(a) What is the 7-bit binary code for the digit five?
[2]
(b) What number is displayed with the following set of bit patterns?
(i)
a
1
(ii)
a
1
b
1
b
1
c
1
d
0
c 0
e
0
d
1
f
1
e
1
g
1
f
0
g
1
[2]
(c) Calculators and watches use a digital display.
State one other device where the output from the processor is to a digital
display. [1]
[5]
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9
What will be the output after the execution of each of the following algorithm segments.
(a) begin
total = 6
count = 5
number = 6
repeat
total = total + number
count = count + 1
until count = 7
output total
end
[2]
(b) begin
a=8
b=6
c=9
If a > b
then c = a + c
else c = c – a
output c
end
[2]
(c) begin
num = 5
for c = 10 downto 5 do
num = num + 2
next c
output num
end
[2]
(d) begin
l=9
k=3
x=I*k
y = x mod 3
output y
end
[2]
(e) begin
x=7
y=9
while x < y do
x=x+2
y = y + 1
endwhile
Output x
[2]
[10]
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10 Consider the following algorithm.
This is a very long algorithm that repeats certain steps. Rewrite this algorithm to
improve the form.
begin
Total = 0
Avg = 0
Enter number 1
Count = count + 1
Total + total + number 1
Is count = 5?
True avg = total / count
False Enter number 2
Count = count + number 2
Total = total + number 2
Is count = 5?
True avg = total / count
False Enter number 3
Count = count + number 3
Total = total + number 3
Is count = 5?
True avg = total / count
False Enter number 4
Count = count + number 4
Total = total + number 4
Is count = 5?
True avg = total / count
False Enter number 5
Count = count + number 5
Total = total + number 5
Is count = 5
True Avg = total / count
False enter number
[5]
End
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11 Read the following algorithm
Count_one = 0
Count_two = 0
Read character
While character <> full stop do
If character = a space or a punctuation mark then
Count_one = count_one + 1
else
Count_two = Count_two + 1
Endif
Read character
Endwhile
Count_one = Count_one + 1
Answer = Count_two / Count_one
Output answer
(a) The input is
This is fun.
What is the output?
[2]
(b) What are the functions of the following variables?
(i) count_one,
(ii) count_two and
(iii) answer
[3]
[5]
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12 Work through the following flowchart and complete the trace table on page 17 using
the following data:
5, -3, 0, -3, 7, 0, 6, -11,
START
neg = 0, n = 0, pos = 0, p = 0
count = 1
input X
Yes
is X < 10
neg = neg + X
n = n +1
No
is X > 10
Yes
pos = pos + X
p = p +1
No
count = count + 1
Yes
is count
<11
END
No
avge1 = neg/n
avge2 = pos/p
output avge1,
avge2
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BLANK PAGE
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17
Candidate Number
Candidate Name
Remove this answer sheet and attach it to your answer book
box
neg
n
pos
p
count
x
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dec
avge1
avge2
output
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JSC 2013, Computer Studies