Antivirus Software
Delhi Police Exam
1. What is Antivirus Software?
Antivirus software is a program designed to detect, prevent, and remove malicious programs like viruses, worms, trojans, and ransomware.
Exam-Focused Definition: Antivirus protects your computer by scanning, detecting, and removing harmful software.
Key Functions:
Real-time scanning of files and programs
Automatic removal of threats
Periodic system scans
Updates to detect new viruses
2. How Antivirus Works
1. Scanning Files
Checks files for known virus patterns (signatures)
2. Heuristic Analysis
Detects unknown viruses by analyzing suspicious behavior
3. Quarantine
Isolates infected files to prevent further damage
4. Automatic Updates
Keeps virus definitions up-to-date to tackle new threats
3. Common Antivirus Software (Examples)
| Antivirus | Key Features | Platform |
|---|---|---|
| Kaspersky | Real-time protection, firewall | Windows, Mac, Android |
| Norton | Malware removal, secure browsing | Windows, Mac, Android |
| McAfee | Virus protection, identity theft protection | Windows, Mac, Android |
| Avast | Free and paid options, email scanning | Windows, Mac, Android |
| Bitdefender | Anti-malware, anti-phishing | Windows, Mac, Android |
Exam Trick: Remember 3 main names for PYQs: Kaspersky, Norton, Avast.
4. Delhi Police PYQ Style Questions
Which of the following is an antivirus software?
Options: (a) Kaspersky (b) Photoshop (c) Windows Media Player (d) MS Word
View Answer
Kaspersky
The main function of antivirus is to:
Options: (a) Edit documents (b) Remove malware (c) Design graphics (d) Manage files
View Answer
Remove malware
Which of the following antivirus is free for basic use?
Options: (a) Norton (b) Avast (c) McAfee (d) Bitdefender
View Answer
Avast
Heuristic analysis in antivirus software is used to:
Options: (a) Detect unknown viruses (b) Remove old files (c) Improve internet speed (d) Update the OS
View Answer
Detect unknown viruses
Quarantine feature in antivirus software:
Options: (a) Deletes all files permanently (b) Isolates infected files (c) Formats the hard drive (d) Updates software
View Answer
Isolates infected files
Short Answer Task
Question:
Explain in 50 words the primary purpose of antivirus software and give two examples commonly used in India.
Hint: Use keywords like detection, prevention, Kaspersky, Norton.
Sample Answer:
Antivirus software protects computers by detecting, preventing, and removing malware like viruses and trojans. It scans files, uses heuristic analysis, and quarantines threats. Popular examples include Kaspersky for real-time protection and Norton for malware removal, both widely used in India for cybersecurity.
5. Quick Recap / Memory Tricks
| Feature | Shortcut Trick |
|---|---|
| Real-time Protection | "Always watching" |
| Quarantine | "Virus in jail" |
| Updates | "Fresh defense" |
| Popular Software | "KNA → Kaspersky, Norton, Avast" |
Exam Tip: Delhi Police often asks definitions, examples, or main features — memorizing 3-4 antivirus names covers most PYQs.
Practical Assignment
Task: Research Antivirus Software
Research and compare different antivirus software to understand their features and pricing.
Visit official websites of Kaspersky, Norton, and Avast
Compare their key features, pricing, and system requirements
Note which ones offer free versions and their limitations
Create a comparison table with your findings
You've completed Antivirus Software!
Courage Tip: Understanding antivirus software is crucial for both exam preparation and real-world cybersecurity. Remember that antivirus programs work through scanning, heuristic analysis, quarantine, and regular updates. Focus on memorizing key examples like Kaspersky, Norton, and Avast, as these frequently appear in Delhi Police computer awareness questions. The memory tricks will help you quickly recall important features during exams.
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