Solved Model 7 Computer Science - Grade IX - 2076
1. Answer the following questions. 5×2=10
a) What is control unit ?
State the function of control unit.
The unit that controls and co-ordinates the
entire operation of computer system is called control unit.
The function of control unit
are :-
i) It decides to set the order
of instruction to be carried out.
ii) It works out what needs to
be done to carry out the instruction.
iii) It has to tell other parts
of processor what they should do so that the instruction will be carried out.
b) What is utility software ?
List any three example of it.
Utility software is system software designed
to help, analyze, configure, optimize or maintain a computer. Any three
examples of utility software are :-
i) Anti-virus
ii) WinZip
iii) Register Cleaner
c) Differentiate between
CD-ROM and CD-RW.
The difference between CD-ROM and CD-RW are :-
CD-ROM
|
CD-RW
|
i)
CD-ROM is an optic disk which
contains audio or software data
whose memory is read only.
|
i)
CD-RW is compact disk that can be written, read arbitrarily many times, Erased,
and written again.
|
ii)
It hold more information
than CD-RW
|
ii)
It hold less information in comparison to CD-ROM.
|
 |
d) Write down the objectives
of IT Policy of Nepal, 2057?
The objective of IT Policy of Nepal 2057 BS
are :-
i) To make information
technology accessible to the general public and increase employment through its
means.
ii) To build a knowledge-based
society.
iii) To establish knowledge-based
industries.
e) What roles do computers
play in medicine ?
Computers play an important role in the growth
and improvement of health and medical sectors. Doctors use computer to find out
the disease and cure for disease. It is used to keep records of patients
medicines and diseases.
2. a) Perform the following binary calculations: 2
i) 1001001 + (10001 -
1101)
ii) 1011001 ÷ 100
b) Convert the following
number system as indicated: 2
i) (151)10=(?)8 ii) (1100110)2=(?)16
3. State true or false. 2
a) The major technical
advantage that characterizes the fourth generation is the tiny integrated
circuit. False
ii) Dot matrix printer is a
high quality non-impact printer that forms characters by spraying small drops
of ink onto the paper. False
iii) E-government promotes
civic engagement by enabling the public to interact with government officials. True
iv) Software directs a
computer to perform input operations, process the data and output the results. True
4. Replace the following definitions
with a technical term. 2
a) An input device that
inserts graphic images of a computer. Graphics Tablet
b) A specialized computer
display that projects and enlarged image on a movie screen. Projector
c) The manufacturing approach
of using computers to control the entire production process. Computer Integrated Manufacturing ( CIM )
d) The practice of making bank
transactions or paying bills via internet. E-Banking
5. Write the full forms. 2
a) CRT – Cathode Ray Tube
b) GIGO – Garbage In Garbage
Out
c) ROM – Read Only Memory
d) CLI – Command Line Interface
6. Match the following. 2
Joseph-Marie Jacquard Mechanical loom
Blaise Pascal Pascaline
Howard Aiken Mark - I
Herman Hollerith Tabulating
Machine
Group B :
Operating System [5 marks]
7. a) What is an operating system ?
1
An operating system is a collection of software
that manages computer hardware resources and provides its users with an
interface.
b) Write the function of
following DOS commands: 2
i) C:\>EDIT LAB.TXT
it allows to make changes in
the file lab.txt of c drive
ii)C:\>DIR/A:H
It displays the hidden files of c drive
c) Write down MS-DOS commands
to do following tasks: 2
i) To deletes all the
files starting with a having any extension.
C:\>DEL A*.*
ii) To display
directories and files of C: drives.
DIR Command
Group C :
HTML [5 marks]
8. Answer the following questions. 2
a) What is a web server ?
A web server is a computer that delivers web
pages.
b) How would you display text
in the title bar browser ?
We would use the <TITLE> tag in inside
<HEAD> tag in HTML document to display text in the title bar browser.
c) Write down the function of
<A> and <BR> tag?
The function of <A> tag is that it
defines the hyperlink, which is used to link from one page to another.
The function of <BR> tag
is that it is used to insert a line break in a paragraph.
9. State true or false. 2
i) HTML is a programming is
language like QBASIC, C++. False
ii) By default value of BORDER
attribute of <TABLE> tag is 1. False
iii) A container tag does not
have a closing tag. False
iv) HREF is an attribute of
<A> tag. True
Group D’
Programming [18 marks]
10. Answer the questions in shirt. 3
a) Differentiate between explicit
and implicit variable declaration.
Explicit
Declaration
|
Implicit
Declaration
|
The
declaration of variable before you use it or before assigning a data to
variable by using DIM statement is known as explicit declaration.
|
The
declaration of variable at place of assigning value to a variable by using
type declaration symbol is known as implicit declaration.
|
b)
What is the purpose of FOR.....NEXT statement ?
The
purpose of FOR…..NEXT statement is that it is used to repeat a sequence of
statements for a specific number of occurrences.
c)
Write down the function of RIGHT$ function and PRINT statement.
The
function of RIGHT$ is that it returns specified number of characters from right
side of supplied string and returns the value.
11. a) Write the output of the
following program. 2
CLS
A$=”NEPAL”
C=LEN(A$)
B=1
D=1
FOR I = 1 TO C STEP 2
PRINT TAB(D); MID$(A$,
B, D)
B=B+1
C=C+2
D=D+1
NEXT I
END
OUTPUT
N
EP
PAL
b) Rewrite the following
program correcting the bugs. 2
CLS
N$=1
COUNT = 1
WHILE COUNT = 10
PRINT N$ 2
N$=N$+1
WEND COUNT
END
Debugged Program
CLS
N=1
COUNT = 1
WHILE COUNT <= 10
PRINT N^ 2
N=N+1
COUNT=COUNT+1
WEND
END
12. Read the following program and
answer the questions: 2
CLS
N=195
FOR P = 1 TO 3
R = N MOD 10
S = S + R ^ 3
N = INT (N/10)
NEXT P
PRINT S
END
Questions :
a) What is the function of MOD
?
The function of MOD is that it returns the
remainder of two numbers after division.
b) What will be output of the
above program if S = S + R ^ 3 is replaced by S = S + R ?
It will find the sum of digits.
13. a) Write a program to find sales
tax of an article priced at Rs. 3
20,000 with 15% tax rate.
CLS
LET S = 20000
T=15/100*S
PRINT “Sales tax=”; T
END
b) Write a program to
generates a numeric series as : 3
2, 4, 8, 14, 22,
............... up to 10th terms.
CLS
A = 2
B = 2
FOR I = 1 to 10
PRINT A
A = A + B
B = B + 2
NEXT I
END
c) Write a program that stores
any five numbers input by a user in an array and display the greatest among the
numbers. 3
CLS
DIM N(5)
DIM N(5)
FOR I = 1 TO 5
INPUT “Enter the number”; N(I)
NEXT I
G = N(1)
FOR I = 2 TO 10
IF N(I) > G THEN G = N(I)
NEXT I
PRINT “Greatest number is”; G
END
End
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