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✨ Class 7 Computer Science Examination ✨
COMPUTISM LAB CLASS 7 HALF YEARLY EXAMINATION
Term Half-Yearly Assessment
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Class: 7
Max Marks: 70
Time Allowed: 2 Hours
Section A: Fill in the Blanks10 Marks
- SMPS stands for Switched-Mode .
- A modem converts digital data into signals.
- The main circuit board of a computer system is called the .
- RAM stands for Random Memory.
- The octal number system consists of 8 digits with the base .
- The hexadecimal number system includes digits from 0 to 9 and letters from A to .
- The term VIRUS stands for Vital Information Resources Under .
- A sector virus infects the boot sector of a hard drive.
- The tag used to insert an image in an HTML web page is .
- Every HTML form uses a element which begins the form structure.
Section B: Multiple Choice Questions (MCQs)20 Marks
- What does CPU stand for?
- a. Central Processing Unit
- b. Computer Power Unit
- c. Central Program Utility
- d. Control Processing Unit
- Which of these is not an external hardware device?
- a. Keyboard
- b. Mouse
- c. RAM
- d. Monitor
- Which device is used to scan documents optically?
- a. Printer
- b. Scanner
- c. Modem
- d. Projector
- A projector is an example of which type of device?
- a. Input
- b. Storage
- c. Output
- d. Processing
- What type of printer uses a printing head that strikes the paper ribbon directly?
- a. Impact printer
- b. Non-impact printer
- c. Inkjet printer
- d. Thermal printer
- What is the base of the hexadecimal number system?
- a. 10
- b. 8
- c. 16
- d. 2
- What is the binary equivalent of the decimal number 10?
- a. 1110
- b. 1010
- c. 1001
- d. 1100
- Which of the following is a valid hexadecimal number representation?
- a. 4D2
- b. 78H
- c. 19G
- d. 8Z4
- To convert a decimal number to binary, repeatedly divide it by which number?
- a. 8
- b. 10
- c. 2
- d. 16
- What does the letter 'C' represent in hexadecimal values?
- a. 13
- b. 12
- c. 14
- d. 15
- Which of these enters a computer without the permission or knowledge of the user?
- a. Antivirus
- b. Virus
- c. Internet
- d. Firewall
- Which of these looks like an antivirus but is actually a malicious program?
- a. Quick Heal
- b. Sweeper
- c. Norton
- d. McAfee
- Which of the following is a self-replicating program without human intervention?
- a. Antivirus
- b. Macro
- c. Worm
- d. Trojan Horse
- What tag is used to define table rows in HTML?
- a. <table>
- b. <tr>
- c. <td>
- d. <th>
- What does <input type="checkbox"> allow the user to do?
- a. Choose multiple options
- b. Choose only one option
- c. Reset form
- d. Submit form
- To add a caption to a table in HTML, use which tag?
- a. <table>
- b. <title>
- c. <caption>
- d. <head>
- To collapse table borders in CSS, which property value should be used?
- a. border-collapse: collapse;
- b. table-collapse: border;
- c. collapse: border;
- d. border: collapse;
- Which attribute specifies the source file path of an image in the <img> tag?
- a. alt
- b. src
- c. href
- d. name
- What tag is used to display a numbered list in HTML?
- a. <ul>
- b. <ol>
- c. <li>
- d. <list>
- Which HTML tag is used to mark text as a hyperlink?
- a. <link>
- b. <a> (Anchor tag)
- c. <href>
- d. <hyper>
Section C: Assertion-Based MCQs10 Marks
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Assertion (A): RAM is known as a volatile memory.
Reason (R): Information stored in RAM is lost when you turn off the computer or power goes off.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, but R is not the correct explanation of A.
c) A is true, but R is false.
d) A is false, but R is true. -
Assertion (A): ROM is a non-volatile memory.
Reason (R): ROM retains stored information even when the power has been switched off.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, but R is not the correct explanation of A.
c) A is true, but R is false.
d) A is false, but R is true. -
Assertion (A): The binary number system uses base 2.
Reason (R): Binary number system consists of ten digits from 0 to 9.
a) Both A and R are true.
b) A is true, but R is false.
c) A is false, but R is true.
d) Both A and R are false. -
Assertion (A): A computer virus can spread via removable storage devices like flash drives.
Reason (R): Flash drives can carry malicious files and execute AutoRun code to compromise host machines.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, but R is not the correct explanation of A.
c) A is true, but R is false.
d) A is false, but R is true. -
Assertion (A): Antivirus software updates its virus database frequently.
Reason (R): Frequent updates ensure the system can detect new and different types of virus threats effectively.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, but R is not the correct explanation of A.
c) A is true, but R is false.
d) A is false, but R is true. -
Assertion (A): A computer worm is a self-replicating program that can travel without human action.
Reason (R): Unlike viruses, worms do not consume network bandwidth or memory.
a) Both A and R are true.
b) A is true, but R is false.
c) A is false, but R is true.
d) Both A and R are false. -
Assertion (A): The <img> tag requires a closing tag like </img> in HTML.
Reason (R): The <img> tag is an empty tag used to add images to a web page.
a) Both A and R are true.
b) A is true, but R is false.
c) A is false, but R is true.
d) Both A and R are false. -
Assertion (A): The action attribute in an HTML form specifies the file or script the form is submitted to.
Reason (R): The method attribute specifies how the form information is posted (Get or Post).
a) Both A and R are true, and R is related to form submission settings.
b) Both A and R are false.
c) A is true, R is false.
d) A is false, R is true. -
Assertion (A): Octal number system consists of 8 digits with the base 8.
Reason (R): Octal system takes binary digits in groups of three to make binary more compact.
a) Both A and R are true, and R explains the reason behind the octal system.
b) Both A and R are true, but unrelated.
c) A is true, R is false.
d) A is false, R is true. -
Assertion (A): Real-time scan in antivirus software runs continuously in the background.
Reason (R): Real-time scan provides maximum protection by screening opened or saved files for security risks.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, but unrelated.
c) A is true, R is false.
d) A is false, but R is true.
Section D: True or False10 Marks
- RAM stores information permanently. (True / False)
- A digital camera is classified as an output device. (True / False)
- Binary numbers use digits from 0 to 7. (True / False)
- The binary system is the most commonly used number system by digital computers. (True / False)
- Data is an important asset for an organisation or individual. (True / False)
- Viruses cannot be sent as executable files (.exe) with email attachments. (True / False)
- A computer worm can travel without any human action. (True / False)
- The <img> tag must always be closed with </img>. (True / False)
- External links lead to a different website or web page. (True / False)
- The border-spacing property is used to change the distance between table cells. (True / False)
Section E: Short Answer Questions (2 Marks Each)20 Marks
- Differentiate between RAM and ROM in terms of usage and volatility.
- Differentiate between internal and external hardware with examples.
- What is a plotter, and how is it used?
- Differentiate between impact and non-impact printers.
- Write the use of a motherboard in a computer system.
- Convert all octal no into binary: 150,73,1020.
- Convert all decimal no into binary: 101100,1100110,101010101.
- Convert all decimal no into binary: 150,73,1020.
- What is the use of an antivirus? Give two examples.
- What is malware?
⭐ Best of Luck for Your Examination! Keep Learning! 🚀
Created by Bijan Krishna Paul