Solved Model Set 3 Computer Science - Grade Nine
1)
Define the term system software and mention its type?
-System
software is the collection of program that control and manages all the internal
operations of computer .Its types are-
a) Operating
Software
b) Device
Driver
c) Utility
Software
d) Language
Translator
2)
What is IT Policy? Write the importance of IT Policy in our country Nepal?
-The
rules and regulation related to information technology to handle or use
technology of computer systematically to fulfill the given objectives is known
as IT Policy.
The
importance of IT Policy in Nepal are-
a) There
will be a significant difference between the economic condition of countries
with develop information technology.
b) The
use of technology will make the economic condition strong, proportional
distribution of economic resources and enhancement of public awareness, raising
leaving standard as well as significant contribution to remove poverty.
3)
Explain the role of control unit of computer operations?
-The
role of control unit in computer operations are-
a) It
decide to set the order of instruction to be carried out.
b) It
works out what needs to be done to carry the instruction out.
4)
Mention any 4 features of micro-computer?
-Any
4 features of micro-computer are-
a) It
works with micro processor.
b) It
is designed as a single user machine.
c) They
are used in offices, homes, schools etc.
d) They
perform different data processing job.
5)
Difference between volatile and non-volatile memory?
-Differences
between them are-
Volatile memory
|
Non-Volatile memory
|
1.
It holds currently running data and programs.
|
It
is a data storage device that holds fixed content in manufactured time.
|
2.
It allows both read and write operations.
|
It
allows only read operations.
|
3.
Example: RAM
|
Example:
ROM
|
2. i) Solve the followig binary
calculations: 2
a) (1011011) + (100100)
- (11111)
=
1011011+ 100100 – 11111
=
01111111 – 11111
=
1100000
b) (100101001)/(1001)
ii) Convert the following: 2
a) (55)10 = (?)2 b) (456)8 = (?)16
1) Match
the following:
Group A
Group B
ii)
RAM
Volatile
iii)
MS-Access
Application software
iv)
EEPROM
Non-Volatile
2) State
True or False
i)
Computer follow GIGI rule. False
ii)
Microprocessor was developed on 3rd generation of
computer. False
iii)
Cyber law is used to stop cyber crime.
True
iv)
Memory is an essential components of
computer system. True
3) Write
the technical term for the following:
i)
Non-Volatile memory of computer.
ROM
ii)
The device that provides output in hardcopy. Printer
iii)
The process of buying and selling the
products over the internet.
E-commerce
iv)
A block of CPU that is used to do logical
operations. ALU
Full Forms:
i)
ICT: Information and communication Technology
ii)
BASIC: Beginner’s All purpose Symbolic Instruction Code
iii)
NITC: National Information Technology Centre
iv)
ASCII: American Standard code for Information Interchange
Group B :
DOS + Windows [5 marks]
7. a) Mention any two features of MS
DOS.
Any
two features of MS DOS are:
a. It
is a 16-bit OS.
b. The mouse cannot be used to operate, i.e. Input
is through basic system commands.
b) Define the terms folder and
sub folder.
A folder (also called directory,
or catalog) is a way to organize computer
files. A folder is a storage space where many files
can be placed into groups and organize the computer.
Subfolder is an organizational folder on a computer that is located within another folder.
c) Write the functions of the
following DOS commands.
i) RD : Its function is
to rename the directory or a folder.
ii) D:\>DIR*.TXT :
Its function is to display the directory having any character of name and .txt
extension.
iii) CHKDSK : Its
function is to check the disk error.
iv) DATE: Its function
is to show date and prompt for change in date.
v) XCOPY: Its function is to copy one or more files or folders from one location to another location.
Group C :
HTML [5 marks]
8. a) Differentiate between
container tag and empty tag with examples.
The
difference between container tag and empty tag are:
Container
tag
|
Empty
tag
|
Those
tags which have both closing and opening is known as container tag
|
Those
tag which have a opening but doesn’t have a closing tag is known as empty tag
|
Its
examples are: <html>….</html>, <body>….</body> etc.
|
Its
examples are: <br>, <img> etc.
|
b) What do you know about hyperlink ?
Hyperlinks
are the tags used for linking two or more than two Web pages.
c) Write the use of following
HTML tags :
i) <P>: This tag
is used for making a paragraph.
ii) <TITLE>: This
tag is used for titling the document.
iii) <HTML>: this
tag is used for representing that it is a HTML webpage.
iv) <B>: this tag
makes any text bold.
v) <IMG>: this tag
inserts image in a webpage.
Group D :
Qbasic Programming [18 marks]
9. Answer the following questions. 2
a) Define variable and
constant with examples.
Variables
are those elements in programming which are used to store some data into it.
Constants
are those which doesn’t changes during the execution of the program.
Example:
1,5,6 etc.
b) Write down the syntax of
the following statements:
i) MID$():
MID$(variable_name, Position, length of string)
ii) LEN():
LEN(variable_name)
10. Write an algorithm to find the
greater number among any two different numbers.
Step
1: start
Step
2: Read any two numbers and store it in variable a and b respectively.
Step
3: Compare a and b; Is a greater than b?
{ Yes: Display a is greatest
No: Display b is greatest.}
Step
4: stop 2
11. a) Write the output of the
following program: 2
CLS
A=1
NUM=3
FOR I = 1 TO NUM
A=A*I
NEXT I
PRINT A
END
OUTPUT:
6
b) Debug the following
program: 2
REM “to calculate average.”
CLS
DIM A = 4
LET B = 6
LET C = 9
FOR K = 3 TO I
AVG=(A+B+C/N)
NEXT K
PRINT “AVERAGE OF GIVEN
NUMBERS IS”, AVG
END
Answer:
REM “to calculate average.”
CLS
LET A =
4
LET B = 6
LET C = 9
AVG=(A+B+C/3)
PRINT “AVERAGE OF GIVEN
NUMBERS IS”, AVG
END
12. Read the following program and
answer the given questions: 2
CLS
LET W = 34
P = W MOD 2
IF P = 0 THEN
PRINT “THE NUMBER
IS POSITIVE”
ELSE
PRINT “THE
NUMBER IS NEGATIVE”
END IF
END
A. List
out the variables used in the above program with their types.
The variables used in the above program are:
W [numeric variable]
P [numeric variable]
B. List
out the operators used in the program along with their types.
The operators used in the program are:
MOD [Arithmetic operator]
= [Relational operator]
13. a) Write a program to calculate
simple interest. 2
where SI = (PTR)/100.
` CLS
INPUT “ENTER PRINCIPLE”;P
INPUT “ENTER TIME”;T
INPUT “ENTER RATE”;R
SI= (P*T*R)/ 100
PRINT “Simple Interest=”; SI
END
b) Write a program to input
three different names and print the longest name. 3
CLS
INPUT “ ENTER A NAME”;N1$
INPUT “ENTER SECOND NAME”;N2$
INPUT “ENTER THIRD NAME”;N3$
IF LEN(N1$) > LEN(N2$) AND
LEN(N1$) > LEN(N3$) THEN
PRINT “THE LONGEST NAME IS”;
N1$
ESLEIF LEN(N2$) > LEN(N1$)
AND LEN(N2$)>LEN(N3$) THEN
PRINT “THE LONGEST NAME IS”;
N2$
ELSE
PRINT “THE LONGEST NAME IS”;
N3$
ENDIF
END
c) Write a program to input
ten different numbers then find and print the greatest number using array
variable. 3
DIM N(10)
CLS
FOR I = 1
TO 10
INPUT "ENTER THE
NUMBERS"; 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"; G
END
