CHAPTER 3 CLASS 7
Here are the questions with correct answers from the worksheet.
A. Choose the Correct Answer
1. The part of a computer's hard drive that is read first during startup and can be infected by a specific type of virus is called the:
a. Random Access Memory
b. Central Processing Unit
c. File Allocation Table
✅ d. Boot Sector
Answer: d. Boot Sector
2. What is the main difference between a computer virus and a worm?
a. A virus is software, while a worm is hardware.
✅ b. A worm can self-replicate and spread over a network without user action, while a virus needs to attach to a program.
c. A virus is always more destructive than a worm.
d. Only viruses can infect email attachments.
Answer: b. A worm can self-replicate and spread over a network without user action, while a virus needs to attach to a program.
3. Antivirus program moves an infected file to a secure location—this is called:
a. Delete
b. Encrypt
✅ c. Quarantine
d. Backup
Answer: c. Quarantine
4. Unwanted and intrusive pop-up windows that appear while you are browsing the internet are a common symptom of:
a. A boot sector virus
b. A faulty monitor
c. A system crash
✅ d. Adware
Answer: d. Adware
5. Which of these is the BEST example of a strong password?
a. 12345678
b. Password
c. MyDogFluffy
✅ d. R$k8@p2!zXvB
Answer: d. R$k8@p2!zXvB
B. Fill in the Blanks
Word Bank: Real-time, Firewall, File Infector, Replicate/Duplicate, Worm
A key characteristic of a computer virus is its ability to Replicate (Duplicate) by making copies of itself.
Answer: Replicate (Duplicate)
A virus that attaches itself to an executable file like a .exe file is known as a File Infector virus.
Answer: File Infector
A Worm is a standalone piece of malware that can spread through computer networks without any human help.
Answer: Worm
Antivirus software uses Real-time-based scanning to compare files against known viruses.
Answer: Real-time
A Firewall is a security device or software that acts as a protective barrier between a computer and the internet.
Answer: Firewall
C. State whether the following statements are True or False
A Trojan Horse is a type of malware that replicates itself across a network without any user action.
Answer: ❌ FalseA strong password should ideally be short and easy to remember, like your pet's name.
Answer: ❌ FalseOnce you install an antivirus, you never need to update it again.
Answer: ❌ FalseQuarantining a file means the antivirus program immediately deletes it permanently.
Answer: ❌ FalseAll pop-up windows on the internet are caused by Adware.
Answer: ❌ False
D. Answer the following questions
1. Why is it important to update an antivirus regularly?
Answer:
It is important to update an antivirus regularly because new viruses are created every day. Updates help the antivirus detect and remove the latest threats.
2. What are the main computer viruses?
Answer:
The main types of computer viruses are:
Boot Sector Virus
File Infector Virus
Macro Virus
Multipartite Virus
3. How can a virus infect your computer?
Answer:
A virus can infect a computer through infected email attachments, unsafe websites, infected USB drives, pirated software, or downloading files from untrusted sources.
4. What is the difference between a computer virus and a computer worm?
Answer:
A computer virus needs to attach itself to a program or file to spread, while a computer worm spreads on its own through computer networks without attaching to a program.
5. What is antivirus software? How does it protect your computer from a possible virus attack?
Answer:
Antivirus software is a program that detects, blocks, and removes viruses and other malware. It protects the computer by scanning files, monitoring suspicious activities, and quarantining or deleting infected files.
6. Explain any two computer viruses in brief.
Answer:
a. Boot Sector Virus:
It infects the boot sector of a hard disk or USB drive and can affect the computer during startup.
b. File Infector Virus:
It attaches itself to executable files (.exe) and spreads when the infected program is run.
Life Skills
1. What advice would you give your friend to protect their computer and data?
Answer:
Install or repair the antivirus software.
Update the antivirus regularly.
Scan the computer for viruses.
Back up important files.
Avoid downloading files from unknown websites.
Do not open suspicious email attachments.
2. Why is it important to keep antivirus software updated?
Answer:
Because updates help the antivirus recognize and remove new viruses and keep the computer safe from the latest cyber threats.
Higher Order Thinking Skills
1. How will you create a fun and educational message to explain the risks of malware?
Answer:
Message:
"Think Before You Click! 🚫🖱️
Unknown links and attachments may contain malware. Always use antivirus software and ask an adult or teacher if you are unsure. Stay safe online!"
2. How would you use logical reasoning to explain the hidden dangers behind adware?
Answer:
Adware may seem harmless because it only shows advertisements, but it can slow down the computer, display unwanted pop-ups, track user activity, and sometimes install harmful software. Therefore, it should not be ignored.
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