Solved Machhapuchchhre IB World School
Kusunti,
Lalitpur
SECOND TERMINAL EXAMINATION 2082 – COMPUTER
SCIENCE – Grade IX
Attempt all
questions.
Group
A (10 Marks)
1. Which of the following is volatile memory?
a. Hard
Disk b. RAM
c. ROM d.
Flash Drive
2. Which of the following software helps the computer to
manage its hardware and provides a platform for application programs?
a.
Application Software b.
Utility Software
c.
System Software d. Antivirus Software
3. Which of the following statements about the CPU is
correct?
a. It
stores data permanently
b.
It processes instructions and manages data flow
c. It
only handles input operations
d. It is
used to connect external devices
4. Which of the following blocks is used to repeat an
action multiple times in PictoBlox?
a.
forever b. repeat 10 times
c.
if-else d.
When green flag clicked
5. On a breadboard, the long vertical lines (power rails)
are usually used for:
a.
Placing resistors only
b.
Connecting sensors
c.
Providing + and – power supply across the board
d.
Connecting Arduino pins directly
6. What is the primary purpose of a firewall in network
security?
a. To
detect and remove malware from infected devices
b.
To monitor and control incoming and outgoing network traffic
based
on security rules
c. To
encrypt sensitive data transmitted over the internet
d. To
create secure passwords for user accounts
7. Which HTML tag is used to create a hyperlink?
a. <a> b. <link>
c.
<hyperlink> d.
<href>
8. What is the purpose of the <head> section in an
HTML document?
a. To
define the main content of the webpage
b. To
include images and videos
c.
To define metadata and links to scripts and stylesheets
d. To
display content on the webpage
9. Which of the following is used to display output in
Python?
a.
input()
b.
display()
c. print()
d.
output()
10. What will be the output of the following code?
a = 15
b = 4
print(a % b)
a. 3 b.
4
c. 11 d.
15
Group ‘B'
(20 Marks)
Answer the following questions in one
sentence: (10X2=20)
Short
Answer Questions
11.
Explain the
role of the Central Processing Unit (CPU) in a computer system.
Answer:
The role of CPU is to receive
data from the input unit, processes instructions, and sends results to the
output unit.
It performs calculations,
logical operations, and decision-making tasks essential for running programs
and managing system operations.
12.
A student
wants to print a document, listen to music, and play a game. Identify one input
device and one output device for each task.
Answer:
Printing a document:
·
Input device:
Keyboard (used to type the document)
·
Output device:
Printer (used to print the document)
·
Listening to music:
·
Input device:
Microphone (if the music is being recorded or created)
·
Output device:
Speakers (used to listen to the music)
·
Playing a
game:
·
Input device:
Mouse (used for interaction)
·
Output device:
Monitor (displays the game)
13.
Convert as
indicated:
a. (11011)₂ into decimal
b. (BAD)₆ into octal
14.
Perform the binary operations as indicated
a. (1100)₂ + (1111)₂ x (10)
b. (1100011)₂ / (111)₂
15.
Rewrite the
Python program after correcting the errors:
#
To display even numbers from 1 to 10
print("Even
number")
for
i in range(1, 10):
if i % 2 == 0:
print(a)
Debugged
Program
#
To display even numbers from 1 to 10
print("Even
numbers:")
for
i in range(1, 11): # Range should go up
to 10 (inclusive)
if i % 2 == 0:
print(i) # Print 'i' instead of 'a'
16.
Explain in
brief the applications of Arduino.
Answer:
Arduino is an open-source platform used for building
digital devices and interactive objects. It is widely used in robotics,
automation, home appliances, and education. Applications include controlling
sensors, lights, motors, and more.
17.
Create a table
having two rows and two columns and a paragraph using HTML tags on the topic
"Nepal’s current situation".
Answer:
<body>
<table border="1">
<tr>
<td>Political
Situation</td>
<td>Economic
Challenges</td>
</tr>
<tr>
<td>Transitioning
governments</td>
<td>Growing
debt and inflation</td>
</tr>
</table>
<p>Despite challenges, Nepal is progressing
towards economic and political stability.</p>
</body>
18.
Study the
following Python code and answer the following questions:
c
= 1
while
c <= 20:
print("Machhapuchhre School")
c = c + 1
a.
List the operators used in the program.
Answer: <=, =, +
b.
What is the purpose of the above program?
Answer: The program prints "Machhapuchhre School"
20 times using a while loop.
19.
Find the
output of the given program by using dry run table:
total
= 0
for
i in range(2, 21, 2):
total += i
print("Final
sum =", total)
Answer: The program calculates the sum of all even numbers
between 2 and 20.
The dry run table:
|
i |
total (sum) |
|
2 |
2 |
|
4 |
6 |
|
6 |
12 |
|
8 |
20 |
|
10 |
30 |
|
12 |
42 |
|
14 |
56 |
|
16 |
72 |
|
18 |
90 |
|
20 |
110 |
Final
sum = 110
20. Write a Python program to input the length and breadth
of a rectangle and find its perimeter.
length
= float(input("Enter the length of the rectangle: "))
breadth
= float(input("Enter the breadth of the rectangle: "))
perimeter
= 2 * (length + breadth)
print("The
perimeter of the rectangle is:", perimeter)
Group
C (20 Marks)
21.
Define
computer hardware? List any two hardware used in daily life along their
functions.
Answer:
Computer Hardware refers to the physical components of a computer system or any
electronic device. It includes all the tangible parts that you can touch and
see, such as the computer's central processing unit (CPU), keyboard, monitor,
hard drive, motherboard, and peripherals like printers and speakers.
Examples:
A monitor,
also called a Visual Display Unit (VDU), is the most common output
device of a computer. It displays processed data as text, images,
graphics, and videos on the screen. The output seen on a monitor is known
as a soft copy because it is temporary and can only be viewed on screen.
A keyboard is
the most common input device used to enter text, numbers, symbols, and commands
into a computer. Most common layout = QWERTY (named after first six keys
on top row). A standard keyboard has 104 keys (more in multimedia keyboards),
grouped into alphabet keys, numeric keys, cursor movement keys, function keys,
and special purpose keys
22.
Study the
given script carefully and answer the following questions:
·
a. How many
steps does the sprite move each time inside the loop?
Answer: 5 steps.
·
b. Why is the
wait 0.1 seconds block important in this code?
Answer: It
ensures that the sprite doesn’t move too fast and allows us to see its
movement.
·
c. What change
would you make to gradually increase the speed of the sprite after each bounce?
Answer: You
could decrease the wait time or increase the number of steps after each bounce.
·
d. Why is the
forever loop used instead of a repeat loop in this program?
Answer: The
forever loop allows the sprite to continuously repeat the action without
stopping, which is ideal for this scenario.
23.
Discuss the
importance of practicing good digital citizenship in online interactions.
Provide at least two examples of responsible online behavior and explain how
they contribute to a safer and more respectful digital community.
Answer:
Practicing good digital citizenship means using the
internet responsibly and respectfully. It helps keep online spaces safe and
friendly for everyone.
Importance:
1.
Respect: Good digital citizenship helps create respectful
online communities where everyone feels safe.
2.
Prevention of
Harm: It reduces online bullying,
spreading false information, and protects privacy.
Examples:
1.
Respecting
Privacy: Don't share others' personal
information or pictures without permission. This keeps everyone’s information
safe.
2.
Being Kind in
Discussions: Engage in polite and
respectful conversations, even when you disagree. This helps create a positive
and welcoming environment online.
<html>
<head>
<title>Cricket Club Registration Form</title>
</head>
<body>
<h2>Cricket Club Registration Form</h2>
<form
action="#" method="POST">
Full
Name:<br>
<input type="text" name="full-name"
required><br><br>
Age:<br>
<input type="number" name="age"
required><br><br>
Date
of Birth:<br>
<input type="date" name="dob"
required><br><br>
Gender:<br>
<input type="radio" name="gender"
value="Male" required> Male
<input type="radio" name="gender"
value="Female" required> Female
<input type="radio" name="gender"
value="Other" required> Other<br><br>
Contact Number:<br>
<input type="tel" name="contact-number"
required><br><br>
Email:<br>
<input type="email" name="email"
required><br><br>
Playing Role:<br>
<select name="playing-role">
<option value="Batsman">Batsman</option>
<option value="Bowler">Bowler</option>
<option value="Allrounder">Allrounder</option>
</select><br><br>
Experience Level:<br>
<input type="radio" name="experience-level"
value="Beginner"> Beginner
<input type="radio" name="experience-level"
value="Intermediate"> Intermediate
<input type="radio" name="experience-level"
value="Advanced"> Advanced<br><br>
Address:<br>
<textarea name="address" rows="4"
cols="50" required></textarea><br><br>
<input type="submit" value="Register">
<input type="reset" value="Clear">
</form>
</body>
</html>
25. Python program that calculates the
factorial
# Ask the user to input a number
num = int(input("Enter a number: "))
# Check if the number is even
if num % 2 == 0:
#
Calculate the factorial manually
factorial
= 1
for i in
range(1, num + 1):
factorial *= i
print(f"The factorial of {num} is {factorial}")
else:
print("The number is odd, so the factorial will not be
calculated.")
?ÿ@
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