MID TERMINAL EXAMINATION 2082 – COMPUTER SCIENCE
– Grade IX
Attempt all
questions.
Group ‘A'(10
Marks)
Choose the correct answer. (10x1=10)
1. A set of
instructions that performs a particular task is called………..
i) data ii) information iii) program iv) hardware
2. Which type of memory is volatile and loses
data when power is turned off?
i) RAM
ii) ROM iii) Flash Memory iv)
Hard disk
3. A………printer
is a popular type of personal computer printer that uses a non-impact,
photocopier technology.
i) laser ii) dot matrix iii) drum iv) ink jet
4. .…….refers to the process of copying files
from remote server computers to users computer.
i) Download ii) Upload iii)
FTP iv) None of these
5. Which of the following programming languages
is considered a Low-Level Language?
i) Python ii) C++ iii)
JAVA iv) Assembly Language
6. Which of the
following is not a valid hexadecimal digit?
i) A ii) E iii)
F iv)
G
7. Which of the following is the first step in
the Program Development Cycle?
i) Coding ii)
Analyzing the problem
iii) Maintenance
iv)
Design
8. In scratch, what term is used for the visual
elements that users can control?
i) Characters ii)
Sprites iii) Objects
iv) Blocks
9. Which
software environment is used for programming Arduino boards?
i) Scratch ii)
Arduino IDE iii) Visual
studio iv)
Eclipse
10. The color attribute is of
………….tag.
i) <FONT> ii) < HR
>
iii) <FONT> and
<HR> iv) None
Group ‘B'
(20 Marks)
Answer the following questions in one
sentence: (10X2=20)
11.
Explain the working principles of
computers with a block diagram.
Ans: The working of a computer is explained by
the IPOS cycle. Data is first entered into the computer using input devices
such as a keyboard or mouse. This data is processed by the CPU, which follows
the instructions stored in memory. The processed data is then displayed as
output through devices such as a monitor or printer. At the same time, data and
results can be stored in devices such as a hard disk or pen drive for future
use. This sequence of input, process, output, and storage explains how raw data
is transformed into meaningful information.
12. What is an
input devices? Write down appropriate input device for data 'audio' and
'video'?
Ans: Input devices are hardware components that
allow users to enter data and instructions into a computer system, enabling
communication between the user and the computer for processing.
The appropriate input device for audio is
microphone and video is webcam.
13. Convert
(315)10 into binary and (A4B)16 into octal.
|
Division |
Quotient |
Remainder (Digit) |
|
(315)/2 |
157 |
1 |
|
(157)/2 |
78 |
1 |
|
(78)/2 |
39 |
0 |
|
(39)/2 |
19 |
1 |
|
(19)/2 |
9 |
1 |
|
(9)/2 |
4 |
1 |
|
(4)/2 |
2 |
0 |
|
(2)/2 |
1 |
0 |
|
(1)/2 |
0 |
1 |
= (100111011)2
(315)10 = (100111011)2
(A4B)16 into octal.
Convert each hex digit to 4 binary digits and then convert each 3
binary digits to octal digits (see conversion tables below):
Converting hexadecimal to binary
= A 4 B
A = 1010
4 = 0100
B = 1011
= 101 001 001 011
Again,
Converting binary to octal
101 = 5
001 = 1
001 = 1
011 = 3
= 5113
(A4B)16 = (5113)8
14. Perform
(1011 X 101)2 + (1001)2 and (10111)2
÷(101)2 binary operations.
|
|
|
|
1 |
0 |
1 |
1 |
|
|
|
|
x |
1 |
0 |
1 |
|
|
|
|
1 |
0 |
1 |
1 |
|
|
|
0 |
0 |
0 |
0 |
x |
|
|
1 |
0 |
1 |
1 |
x |
X |
|
|
1 |
1 |
0 |
1 |
1 |
1 |
Now,
|
|
1 |
1 |
0 |
1 |
1 |
1 |
|
|
|
+ |
1 |
0 |
0 |
1 |
|
1 |
0 |
0 |
0 |
0 |
0 |
0 |
(1011 X 101)2 + (1001)2 = (1000000)2
(10111)2 ÷(101)2
|
101) |
1 |
0 |
1 |
1 |
1 |
(100 |
|
|
1 |
0 |
1 |
|
|
|
|
|
0 |
0 |
0 |
1 |
1 |
|
|
|
|
|
|
|
0 |
|
|
|
|
|
|
1 |
1 |
|
Q = 100
R = 1
15. List
different types of ports and explain any one of them.
Ans: The different types of ports are USB, HDMI, Ethernet, VGA port.
The
Type-C port is a modern hardware connector commonly found in smartphones,
laptops, and tablets. It is small, reversible (can be plugged in either way),
and supports fast charging, high-speed data transfer, and connection with
multiple accessories.
16. Differentiate between UI and
UX design in web development.
|
Aspect |
UI (User Interface) |
UX (User Experience) |
|
Definition |
The
visual elements (buttons, icons, menus). |
The
overall experience of using the product. |
|
Focus |
How
the product looks. |
How
the product works and feels. |
|
Goal |
To
make the product visually appealing. |
To
make the product easy to use and enjoyable. |
|
Example |
Design
of buttons and layout of an app. |
Smooth
navigation and quick load times of an app. |
17. Write down
the function of following HTML tag:
i. <TR> - Defines a row in an HTML table.
ii. <MARQUEE> - Creates a scrolling.
iii. <P> -
Defines a paragraph.
iv. <IMG> - Inserts an image.
18. Observe the given block and give answer of
given question.
Question:
a) What is the function of “When I start as a
clone”?
Ans: The
function of the "When I start as a clone" block in Scratch is to
specify actions that should occur when a clone of the sprite is created. In
this script, it makes the cloned sprite move to a random position on the
screen.
b) What will be the result of above script when
mouse clicked?
Ans: The result of the above
script when the mouse is clicked will be as follows:
·
When the green flag is clicked, the program will repeatedly
create clones of the sprite as long as the mouse is held down.
·
Each clone will go to a random position on the screen.
·
If the mouse is pressed down, the clone will keep appearing in
random positions.
·
When the mouse is released, the clones will be deleted.
19. Analyze the following flowchart and write the
output. (2)
The output of the flowchart is
1
2
3
4
5
20. Write flowchart to display area of rectangle.
Group ‘C (5X4=20)
21. What
is programming language? Differentiate between compiler
and
interpreter. (2+2)
Ans: A programming language is a language
consisting of a set of instructions provided by the user that tells a computer
what task to do and how to do it.
22.
Write the function of the following
blocks. (4X1=4)
1. Switch
backdrop to backdrop1: This block changes the backdrop of the scene to "backdrop1."
2. Set my
variable to 0: This block sets a variable named "my variable" to a value of
0.
3. If on edge,
bounce:
This block makes the sprite bounce when it touches the edge of the screen.
4. Repeat until: This block repeats a set
of actions until a specified condition is met. The actions inside the block
will run continuously until the condition is satisfied.
23. Write HTML code to create the
following webpage. (4)
<html>
<head>
<title>Vacancy Announcement</title>
</head>
<body>
<center><h3><u>Vacancy
Announcement</u></h1></center>
<p>XYZ Software Company requires qualified candidates for the
following posts:</p>
<img
src="vac.png" height=300 width=300 align=right>
<ol>
<li>Software developer
<li>Graphics designer
<li>Website designer
</ol>
<b>Qualification required:</b>
<table border=1>
<tr>
<th>POST</th>
<th>Qualification</th>
</tr>
<tr>
<td>Software developer</td>
<td>BE (Computer Engineering)</td>
</tr>
<tr>
<td>Graphics developer</td>
<td>B.Sc. Computer Science</td>
</tr>
<tr>
<td>Website developer</td>
<td>B.Sc. IT</td>
</tr>
</table>
</body>
</html>
24. List
down the components of Scratch interface. Explain any one of them. (3+1)
Ans: The components of
scratch interface are:
v Stage
v Sprites
v Scripts
v Blocks Palette
v Backdrop
Sprites- Sprites are
characters or objects that can interact in a Scratch project
25. What is web development life cycle?
List all the stages of it and
explain
any one of them. (2+1+1)
Ans: The web
development life cycle is a systematic process of creating and maintaining a
website or web application. The stages of web development life cycle are:
Stages of WDLC
·
Gathering Information
·
Design and Layout
·
Content creation
·
Development
·
Testing
·
Deployment
·
Maintenance and Updating
Gathering Information:
This first stage focuses on understanding the project’s goals and collecting
all the necessary information to build the website.
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