PABSON Kathmandu
FIRST TERMINAL EXAMINATION-2082
Subject: Opt. II Computer Science Full Marks: 50
Class: 10 Time: 2 hrs.
Candidates are required to answer the
questions in their own way words as far as practicable. Figures in the margin indicate
the full marks.
Attempt all questions.
Group “A”
1. Answer the following question in one
sentence: [6×1=6]
a)
What is telecommunication?
The
transmission of data and information from one place to another for the purpose
of communication is known as telecommunication.
b) Mention
any two key elements of digital citizenship.
Any two key elements of digital
citizenship are:
v
Digital Access: The state of full electronic
participation in society.
v
Digital
Commerce: The act of promoting the purchase of goods through electronic means.
c) List
any two common services provided by the internet.
Any two common services provided by
the internet are e-mail and e-commerce.
d)
What is cyber crime?
Cybercrime
refers to illegal activities carried out using computers, networks, or the
internet, such as hacking, identity theft, online fraud, and spreading
malicious software.
e) Define
global variables?
Variables which are declared outside
the procedure and whose values can be accessed from any procedure or module are
called global variables.
f)
What is modular programming?
Modular programming is a technique which divides
program into many small logical, manageable and functional modules or blocks
2. Write appropriate technical term for the
following: [2×1=2]
a) Mode of communication where both
sides communicate alternately. Half Duplex Mode
b) The responsible use of ICT. Digital
Citizenship
3. Write full form of the following: [2×1=2]
a) ETA – Electronic Transaction Act
b) DSL - Digital Subscriber Line
Group “B”
4. Answer the following question: [9×2=18]
a) Define
network topology. Sketch a drawing of star topology.
Topology refers
to the layout or arrangement of devices within a Local Area Network (LAN).
Drawing of star topology
b) What is
a search engine? Give one example.
A search engine
is an online tool that helps users find information on the internet using
keywords or phrases, and provide relevant results. E.g. Google.
c) Write
any four commandments of computer ethics.
Any four commandments of computer ethics are:
v
Do
not use a computer to publish fake information.
v
Do
not search the file or record of other people.
v
Do
not destroy or delete the records of other people.
v
Do
not use a computer to steal someone's privacy.
d) What is
the IT Policy 2072? Write its main purpose.
The IT Policy 2072 B.S. (2015 A.D.) is a
national-level policy introduced by the Government
of Nepal to guide the development and expansion of Information and
Communication Technology (ICT) across the country.
The main purpose
of the IT Policy 2072 is to
transform Nepal into a knowledge-based society by promoting sustainable
development through the widespread use of ICT.
e) Mention any two opportunities and two threats of using
the internet in daily life.
Two opportunities of using the internet in daily life are:
·
Provides instant access to a wide
range of information on various topics.
·
Facilitates instant communication
through emails, messaging apps, and video calls with people around the world.
Two threats of using the internet in daily life are:
·
Personal information can be exposed
to hackers or misused by online services.
·
Individuals may face harassment or
bullying online.
f) Write
any two possible consequences of breaking cyber law.
Any two possible consequences of breaking cyber law are :
·
A minimum Rs 50,000 to a maximum Rs 3,00,000 in cash fine and
six months to three years imprisonment.
·
Difficulty
in future employment, education, or partnerships.
g) Differentiate between a centralized computer network and
a peer-to-peer network.
|
Centralized
Computer Network |
Peer-to-Peer
(P2P) Network |
|
A network where a central server
controls access, resources, and communication. |
A network where each computer
(peer) acts both as a client and a server. |
|
Centralized control – the server
manages data and resources. |
No
central control – each peer manages its own resources. |
h) What is the
difference between a hub and a switch?
|
Hub |
Switch |
|
It transmits data slower than switch. |
It transmits data faster than hub. |
|
It broadcasts the information packets to all computer connected network. |
It transfers packets to only those selected computers connected in
network. |
i) Compare traditional
mail and e-mail.
|
Traditional
Mail (Postal Mail) |
E-mail
(Electronic Mail) |
|
A physical method of sending
written messages or parcels via postal services. |
A digital method of sending
messages over the internet. |
|
Paper, envelopes, stamps, and
postal delivery. |
Internet-connected devices and
email servers |
5. Write
down the output of the given program and show them in dry run table: [2]
DECLARE SUB KAV()
CLS
CALL KAV()
END
SUB KAV()
FOR I= 1 TO 5
PRINT I * I;
NEXT I
END SUB
Dry Run
|
I=1 to 5 |
PRINT I * I |
|
1 to 5 yes |
1x1=1 |
|
2 to 5 yes |
2x2=4 |
|
3 to 5 yes |
3x3=9 |
|
4 to 5 yes |
4x4=16 |
|
5 to 5 yes |
5x5=25 |
|
6 to 5 no Loop exits |
|
The output of the program is:
1
4
9
16
25
6. Rewrite the given program after correcting
the bugs: [2]
DECLARE
DISPLAY(T$)
T$=
“COMPUTER”
CALL SUM(T$)
END
SUB DISPLAY(T)
FOR C= 1 TO LEN (T$) STEP 2
D$=MID$(T$,C,1)
PRINT D$;
NEXT C
END
Debugged Program
DECLARE SUB DISPLAY(T$)
T$=
“COMPUTER”
CALL DISPLAY
(T$)
END
SUB DISPLAY(T$)
FOR C= 1 TO LEN (T$) STEP 2
D$=MID$(T$,C,1)
PRINT D$;
NEXT C
END SUB
7. Study the following program and answer the
given questions. [2×1=2]
DECLARE FUNCTION SUM(A)
CLS
A=5
PRINT SUM(A)
END
FUNCTION SUM(A)
FOR K= 1 TO A
IF K MOD 2 = 0 THEN
S=S+K
END IF
NEXT K
SUM=S
END FUNCTION
Question:
a) How many time loop FOR…. NEXT will execute?
5 times FOR…..NEXT loop will execute.
b) List local variable used in the above program.
The local variable used in the above program are A, K and
S.
Group
“C”
8. Convert/Calculate as per the instruction. [4×1=4]
i) (55)8 = (?)16 ii)
(111100)2=(?)8
iii) (1010 +1101)2
- (110)2 iv) (100111)2 ÷
(110)2
9. Answer the following questions. [4×2=8]
a) Write a QBASIC program that asks the radius of a
cylinder and calculates its area and volume. Create a user defined function to calculate area and sub end sub to calculate
volume of cylinder. [A = 2Ï€r² + 2Ï€rh and V = Ï€r²h]
DECLARE FUNCTION AREA(R, H)
DECLARE SUB VOLUME(R, H)
CLS
INPUT "Enter radius of the
cylinder: ", R
INPUT "Enter height of the
cylinder: ", H
PRINT "Surface Area of Cylinder
= "; AREA(R, H)
CALL VOLUME(R, H)
END
FUNCTION AREA(R, H)
AREA = 2 * 3.14 * R * (R + H)
END FUNCTION
SUB VOLUME(R, H)
V = 3.14 * R * R * H
PRINT "Volume of Cylinder = "; V
END SUB
b) Write a QBASIC program to ask an integer to
find remainder and quotient divided by 5 by using function procedure.
DECLARE FUNCTION
REMAINDER(N)
DECLARE FUNCTION
QUOTIENT(N)
CLS
INPUT "Enter an
integer: ", N
PRINT "Quotient
when divided by 5 = "; QUOTIENT(N)
PRINT "Remainder
when divided by 5 = "; REMAINDER(N)
END
FUNCTION QUOTIENT(N)
QUOTIENT = N \ 5
END FUNCTION
FUNCTION REMAINDER(N)
REMAINDER = N MOD 5
END FUNCTION
10. Write a QBASIC program to input the sides of the
square and calculate perimeter by using a
function. [4]
DECLARE FUNCTION
PERIMETER(S)
CLS
INPUT "Enter side
of the square: ", S
PRINT "Perimeter of
the square = "; PERIMETER(S)
END
FUNCTION PERIMETER(S)
PERIMETER = 4 * S
END FUNCTION
OR
Write
a QBASIC program to print the first 10 natural numbers and their sum by using sub end sub procedure.
DECLARE SUB SHOW()
CLS
CALL SHOW
END
SUB SHOW
SUM = 0
FOR I = 1 TO 10
PRINT I;
SUM = SUM + I
NEXT I
PRINT "Sum of first 10 natural
numbers = "; SUM
END SUB
?ÿ@
