2081-06-18
SOLVED
PABSON Kathmandu
MID TERMINAL
EXAMINATION-2081
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'(10 Marks)
1. Answer the following questions in one
sentence: (6x1=6)
a) What is LAN?
Ans: LAN (Local Area Network) is a network that
connects computers within a limited area such as a home, school, or office
building.
b) Give any two examples of AI.
Ans: Two examples of AI are voice assistants
(e.g., Siri, Alexa) and self-driving cars.
c) What is data redundancy?
Ans: Data redundancy is the duplication of data
within a database.
d) What is the purpose of a table?
Ans: The purpose of a table is to organize and
store data systematically in rows and columns.
e) What is global variable in QBASIC?
Ans: A global variable in QBASIC is a variable
that can be accessed and modified from any part of the program.
f) What is looping?
Ans: Looping is the process of repeating a set
of instructions until a specified condition is met.
2. Write appropriate technical term for the
following: (2×1=2)
a) Digital marks created while using internet. Digital footprint
b) Making duplicate copy of file for security
purpose. Backup
3. Write the full form of the following: (2×1=2)
a) GIF - Graphics Interchange Format
b) NIC - Network Interface Card
Group 'B' (24 Marks)
4. Answer the following questions: (9×2=18) mail.
a) Give any two advantages of e-mail over
traditional mail.
Ans: Two advantages of email over traditional
mail are faster delivery and the ability to send multimedia attachments (such
as images and documents) instantly.
b) Write any two advantages and disadvantages of
social media.
Ans: Advantages of
social media:
- Facilitates
easy communication and networking with people worldwide.
- Provides
a platform for sharing information and promoting businesses.
Disadvantages of social media:
- Can
lead to privacy issues and data breaches.
- May
cause addiction and negatively impact mental health.
c) What do you mean by software security? Write
any two methods to protect the computer software.
Ans: Software
security refers to measures taken to protect software from unauthorized access,
vulnerabilities, and malicious attacks.
Two methods to protect computer software:
- Use
strong passwords.
- Install
and regularly update antivirus software.
d) Write any two advantages and disadvantages of
online payment.
Ans: Advantages of online payment:
- It
is fast and convenient, allowing payments to be made instantly from
anywhere.
- It
provides easy record-keeping and transaction history.
Disadvantages of online payment:
- It
can be easily targeted by hackers and used for fraud.
- It
requires a reliable internet connection, which may not always be
available.
e) Define virtual reality. Write any two areas
where VR is used.
Ans: Virtual reality (VR) is a
computer-generated simulation that immerses users in a three-dimensional,
interactive environment.
Two areas where VR is used:
· Gaming and entertainment.
· Medical training and therapy.
f) What is database? Give any two examples of
it.
Ans: A database is an organized collection of
data that is stored and managed for easy access, retrieval, and updating.
Two examples of databases: Dictionary and Marks
Ledger
g) What is validation rule and validation text?
Ans: Validation rule is a condition set on data
entry fields to ensure that the entered data meets specific criteria.
Validation text is the message displayed to
users when the data they enter does not meet the validation rule.
h) What is a query? What is the purpose of query
in MS-Access?
Ans: A query is a request to extract specific
information from a database.
The purpose of a query is to retrieve, filter,
and manipulate data from one or more tables to meet specific requirements,
allowing users to easily analyze and make decisions based on that data.
i) What is report in MS-Access? Why it is
important?
Ans: A report in MS-Access is a formatted
document that presents data from the database, allowing users to view,
summarize, and print information in an organized way.
Reports are important because they help present
data in a structured way, making it easier to analyze, share, and make informed
decisions.
5. Write down the output of the given program.
(Show with dry run in table). (2)
DECLARE SUB Show (XY$)
CLS
XY$ = "HTUOMENXSA"
CALL Show(XY$)
END
SUB Show(XY$)
A = 47
FOR I = 1 TO 5
N = A
MOD 7
PRINT
MID$(XY$, N, 1)
A = A
- 1
NEXT I
END SUB
Dry Run in Table:
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XY$
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A
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I = 1 TO 5
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N =A MOD 7
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PRINT MID$(XY$, N, 1)
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A = A - 1
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HTUOMENXSA
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47
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1 to 5 yes
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47 MOD 7 = 5
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M
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46
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46
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2 to 5 yes
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46 MOD 7 = 4
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O
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45
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45
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3 to 5 yes
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45 MOD 7 = 3
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U
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44
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44
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4 to 5 yes
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44 MOD 7 = 2
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T
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43
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43
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5 to 5 yes
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43 MOD 7 = 1
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H
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42
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42
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6 to 5 no
Loop exits
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The output of the program is:
M
O
U
T
H
6. Re-write the given program after correcting
the bugs: (2)
REM to display greatest number
DECLARE GREAT FUNCTION (a, b, c)
ACCEPT a, b, c
PRINT GREAT (x, y, z)
END
FUNCTION GREAT (a, b, c)
IF a>b or a>c THEN
G=a
ELSEIF b>a AND b>c THEN
G=b
ELSE
G=c
NEXT
G=GREAT
END SUB
Debugged Program
REM to display greatest number
DECLARE GREAT FUNCTION (a, b, c)
INPUT a, b, c
PRINT GREAT (a,b,c)
END
FUNCTION GREAT (a, b, c)
IF a>b AND a>c THEN
G=a
ELSEIF b>a AND b>c THEN
G=b
ELSE
G=c
END IF
GREAT=G
END SUB
7. Study the following program and answer the
given questions: (2x1=2)
REM “to count vowels”
DECLARE FUNCTION count (A$)
INPUT "Enter a word"; A$
End
FUNCTION count (A$)
B=LEN (A$)
C$=UCASE$(A$)
FOR I=1 to B
E$=MID$(C$, I, 1)
IF E$="A" or E$= "E" or E$=
"I" or E$="O" or E$ = "U" THEN
C=C+1
END IF
NEXT I
Count=C
END FUNCTION
Questions:
a) List the string library functions used in the
above program.
Ans: The string library functions used in the
above program Re LEN ( ), UCASE$( ), MID$( )
b) Write down the missing execute the program.
statements in the main module to execute the program.
Ans: PRINT count(A$) is missing
execute the program. statements in the main module to execute the program.
Group C (16 Marks)
8. Convert/Calculate as per the instruction:
(1x44)
i) (231)8 = (x)10
(2 × 8²) + (3 × 8¹) + (1 × 8⁰)
(2 × 64) + (3 × 8) + (1 × 1)
(128) + (24) + (1)
= 153
(231)8 = (153)10
ii) (1D3)16 = (?)2
Convert each hex digit to 4 binary digits (see
conversion table below):
1D3
= 1 D 3
1 = 0001
D = 1101
3 = 0011
(1D3)16 = (111010011)2
ⅲ) (111001-11) + 111001
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1
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1
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1
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0
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0
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1
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-
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1
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1-
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1
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1
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0
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1
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1
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0
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+
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1
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1
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1
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0
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0
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1
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1
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1
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0
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1
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1
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1
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1
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(111001-11) + 111001 = 1101111
iv) (101101 ¸ 110)
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110)
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1
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0
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1
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1
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0
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1
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(111
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1
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1
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0
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1
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0
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1
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0
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1
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1
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0
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1
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0
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0
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1
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1
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1
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0
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1
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1
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Q=111
R=11
9. Answer the following (4x2=8)
a) WAP that asks principal, time and rate of
interest and calculate simple interest using SUB.... END SUB and amount using
FUNCTION.... END FUNCTION. [Hint: SI=P*T*R/100, Amount=P+SI]
DECLARE SUB CSI (P, T, R, SI)
DECLARE FUNCTION AMT (P, SI)
CLS
INPUT "Enter Principal: "; P
INPUT "Enter Time (in years): "; T
INPUT "Enter Rate of Interest: "; R
CALL CSI(P, T, R, SI)
A = AMT(P, SI)
PRINT "Simple Interest: "; SI
PRINT "Total Amount: "; A
END
SUB CSI (P, T, R, SI)
SI = P
* T * R / 100
END SUB
FUNCTION AMT (P, SI)
AMT =
P + SI
END FUNCTION
b Write a program to check whether a string is
palindrome or not using SUB...END SUB
DECLARE SUB REV (S$)
CLS
INPUT "ENTER ANY STRING"; S$
CALL REV(S$)
END
SUB REV (S$)
FOR I = LEN(S$) TO 1 STEP -1
B$ = MID$(S$, I, 1)
W$ = W$ + B$
NEXT I
IF S$ = W$ THEN
PRINT “THE
GIVEN STRING IS PALINDROME”
ELSE
PRINT “THE GIVEN STRING IS NOT PALINDROME”
END IF
END SUB
10. Write a program to ask number and check it
is exactly divisible by 4 and 6 using SUB......END SUB.
DECLARE SUB CHECK
(N)
CLS
INPUT “ENTER ANY
NUMBER”; N
CALL CHECK (N)
END
SUB CHECK (N)
IF N MOD 4 = 0
AND N MOD 6 = 0 THEN
PRINT “THE GIVEN
NUMBER IS COMPLETELY DIVISIBLE BY 4 AND 6”
ELSE
PRINT THE GIVEN
NUMBER IS NOT COMPLETELY DIVISIBLE BY 4 AND 6”
END IF
END SUB
or
Write a program in QBASIC to display sum of
first 10 natural numbers using FUNCTION.... END FUNCTION.
DECLARE FUNCTION
SUM( )
CLS
PRINT “Sum of first 10 natural numbers is”; SUM
END
FUNCTION SUM( )
S=0
FOR I = 1 TO 10
S = S + I
NEXT I
SUM = S
END FUNCTION
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