Computer Science Question Model Set Grade 9

 

Grade: 9	Subject: Computer Science	Full Marks: 50
Time: 1:30 Hrs

 

Group 'A' (10 Marks)

 

1.  Answer the following questions in one sentence. [6×1=6]

a) Why computer called a diligence machine?

Ans:  The term "diligence machine" refers to a computer, as it can perform tasks with speed and accuracy, embodying the characteristic of diligence.

 

b) Define application software.

Ans: Application software refers to computer programs designed to perform specific tasks for users, such as word processing, spreadsheet management, and gaming, among others.

 

c) What is CSS?

Ans: CSS (Cascading Style Sheets) is a styling language used to define the layout and appearance of web pages, separate from their content written in HTML.

 

d) What is a flowchart?

Ans: Flowchart is a diagrammatical representation of problem.

 

e) What is Hypertext Markup Language?

Ans: Hypertext Markup Language (HTML) is a standardized system for tagging text files to achieve font, color, graphic, and hyperlink effects on World Wide Web pages.

 

f) Why is QBASIC called a high-level programming language?

Ans: QBASIC is a high-level programming language due to its abstraction from hardware and inclusion of built-in functions and control structures for easier programming.

 

2. Write appropriate technical term for the following.  [2×1=2]

a) Contains deleted files and folder.

Ans: Recycle Bin

 

b) A rigid circular platter coated with material that allows the magnetic recording of computer data.

Ans: Hard Disk Drive (HDD)

 

3. Write the full forms of the following:  [2×1=2]

a) MHz: Megahertz

b) UPS: Uninterruptible Power Supply

 

Group "B" (24 Marks)

4.  Answer the following questions. [9×2=18]

a) What is computer memory? Write its major classification.

Ans: Computer memory is a temporary storage space for data, which can be classified into two main types: RAM (Random Access Memory) and ROM (Read-Only Memory).

 

b) Differentiate between input unit and output unit.

Ans: Following are the differentiate between input unit and output unit.

Input unit	Output Unit
Receives data and instructions from external sources	Provides processed data to the user or other external devices
Reads data into the system	Sends data out of the system
Input-oriented	Output-oriented
Examples: Keyboard, Mouse, Scanner, Microphone	Examples: Monitor, Printer, Speakers, Projector

 

c) What is mainframe computer and what are its typical applications?

Ans: A mainframe computer is a large and expensive computer system designed to handle the heavy workloads of large organizations, such as corporations, government agencies, and academic institutions

Following are the typical applications of mainframe computer.

i) Transaction processing

ii) Database management

 

d) Mention the major function of operating system.

Ans: The major functions of an operating system (OS) are:

i) Resource Management

ii) Memory Management

iii) Process Management

iv) File Management

 

e) Define computer graphics. What are the application areas of computer graphics?

Ans: Computer graphics is the field of computer science concerned with creating images and visual representations of data using computer algorithms and hardware.

Applications areas of computer graphics include:

i) Multimedia and entertainment

ii) Design and Engineering

iii) Advertising and Marketing

iv) Education and Training

 

f) What is the purpose of the web server? Give any two examples of web server applications.

Ans: The purpose of a web server is to serve content over the internet or a local network. A web server receives requests from clients (such as web browsers), retrieves the requested resources, and returns the content to the client for display.

Following are the two examples of server applications.

i) Apache         ii) Nginx

 

g) How is the FONT tag used? What are its attributes?

Ans: The FONT tag is used in HTML to control the appearance of text within a web page. The FONT tag is used to specify the font size, color, and face of text within an HTML document.

The FONT tag has several attributes, including:

i) Size   ii) Color    iii) Face    iv) Style

 

h) Write the purpose and syntax of the following HTML tags.

i) <HR>: The <HR> (Horizontal Rule) tag is used in HTML to create a horizontal line or rule, which can be used to separate content into different sections.

Syntax:

<p>This is the first section of content.</p>

<HR>

<p>This is the second section of content.</p>

 

ii) <BR>: The <BR> (Line Break) tag is used in HTML to insert a line break, which is used to separate text into separate lines.

Syntax:

Syntax:

<p>Line 1 of text.<BR>

Line 2 of text.<BR>

Line 3 of text.</p>

 

i) Write down the HTML code for the following tasks:

i) Intended for displaying data in rows and columns on a web page.

Ans: <table>

  <tr>

    <th>Header 1</th>

    <th>Header 2</th>

    <th>Header 3</th>

  </tr>

  <tr>

    <td>Row 1, Column 1</td>

    <td>Row 1, Column 2</td>

    <td>Row 1, Column 3</td>

  </tr>

  <tr>

    <td>Row 2, Column 1</td>

    <td>Row 2, Column 2</td>

    <td>Row 2, Column 3</td>

  </tr>

</table>

 

ii) Used for creating e-mail links

Ans: <a href="mailto:example@email.com">Send an email</a>

 

5. Output of the following program with a Dry run.           [ 2 ]

CLS

n = 1

FOR i = 1 TO 5

PRINT n

n = n * 10 + 1

NEXT i

END

 

Dry Run:

Var n	Check Loop	Result/Output
1	i=1 to 5 ? Yes	1
1X10+1=11	i=2 to 5? Yes	11
11X10+1=111	i=3 to 5? Yes	111
111X10+1=1111	i=4 to 5? Yes	1111
1111X10+1=11111	I=5 to 5? Yes	11111
11111X10+1=111111	I=6 to 5? No Exit from loop

 

 

Final Output:

1

11

111

1111

11111

 

6. Debug the following program.  [ 2 ]

CLS

INPUT "Type any number";n

FOR x= 1 TO n

r=x MOD n

IF r= 0 THEN c=c+1

NEXT x

IF c=0 THEN

PRINT "Prime"

ELSE

PRINT "Composite"

END

 

Debugged program:

CLS

INPUT "Type any number";n

FOR x= 1 TO n

r=n MOD x

IF r= 0 THEN c=c+1

NEXT x

IF c=2 THEN

PRINT "Prime"

ELSE

PRINT "Composite"

ENDIF

END

 

7. Study the following and answer the given questions. [ 2 ]

CLS

FOR I = 1 TO 10

READ n

b= n MOD 5

IF b=0 THEN c=c+1

NEXT i

DATA 7,15,6,10,15,32,8,22,25,5

PRINT c

END

a) Write down the output of the program.

Ans: 5

b) Name the loop used in above program.

Ans: FOR ……NEXT

 

Group "C" [16 Marks]

8. Write a QBASIC program that asks any three numbers and display the average. [4]

Ans:

CLS

INPUT "Enter the first number"; n1

INPUT "Enter the second number"; n2

INPUT "Enter the third number"; n3

average = (n1 + n2 + n3) / 3

PRINT "The average of the three numbers is"; average

END

 

9. Write a QBASIC to find the middle number among input three numbers. [4]

CLS

INPUT "Enter any three numbers"; a, b, c

IF a > b AND a < c OR a < b AND a > c THEN

m = a

ELSEIF b > a AND b < c OR b < a AND b > c THEN

m = b

ELSE

m = c

END IF

PRINT "Middle number="; m

END

 

10. Write a QBASIC program to generate the following series.  [4]

            7,22,11,34…..up to 10th term

Ans:

CLS

n = 10

PRINT "The first "; n; " terms of the series are:"

a = 7

FOR i = 1 TO n

    PRINT a;

    a = a * 2 + 1

NEXT i

END

 

11. Write a QBASIC program to find HCF of any two numbers. [4]

Ans:

CLS

INPUT "Enter first number: ", num1

INPUT "Enter second number: ", num2

IF num1 < num2 THEN

    temp = num1

    num1 = num2

    num2 = temp

END IF

rem = num1 MOD num2

WHILE rem <> 0

    num1 = num2

    num2 = rem

    rem = num1 MOD num2

WEND

PRINT "The HCF of the two numbers is "; num2

END

 

OR

 

Write a QBASIC program to count the total number of words from supplied sentence.

Ans:

CLS

INPUT "Enter a sentence: ", sentence$

wordCount = 0

FOR i = 1 TO LEN(sentence$)

    IF MID$(sentence$, i, 1) = " " THEN

        wordCount = wordCount + 1

    END IF

NEXT i

wordCount = wordCount + 1

PRINT "The total number of words in the sentence is: "; wordCount

END