Advanced Computer Knowledge

This chapter supplements Chapter 7 with additional practice on computer fundamentals, internet basics, and everyday digital literacy topics tested in the Delhi Police Constable Computer Knowledge section.

Practice Set (10 MCQs)

1. Which of the following is an input device?
   (a) Keyboard (b) Printer (c) Monitor (d) Speaker
2. What does "CPU" stand for?
   (a) Central Processing Unit (b) Computer Processing Unit (c) Central Program Unit (d) Central Processor Utility
3. Which of the following is used to protect a computer from viruses?
   (a) Antivirus software (b) Word processor (c) Spreadsheet software (d) Web browser
4. What is the full form of "URL"?
   (a) Uniform Resource Locator (b) Universal Resource Link (c) Uniform Reference Locator (d) Universal Reference Link
5. Which key is used to delete a character to the left of the cursor?
   (a) Backspace (b) Delete (c) Enter (d) Tab
6. Which of the following is a valid email address format?
   (a) name@example.com (b) name.example.com (c) name#example.com (d) name@@example.com
7. What does "Wi-Fi" primarily provide?
   (a) Wireless internet connectivity (b) Wired internet connectivity only (c) A type of processor (d) A type of monitor
8. Which shortcut key combination is used to copy selected text?
   (a) Ctrl+C (b) Ctrl+V (c) Ctrl+X (d) Ctrl+Z
9. What is the full form of "PDF"?
   (a) Portable Document Format (b) Personal Document File (c) Printable Document Format (d) Portable Data File
10. Which of the following best describes a "firewall" in computer security?
    (a) A system that monitors and controls incoming and outgoing network traffic (b) A type of hardware storage device (c) A backup utility (d) A type of monitor

Answer Key with Explanations

1.(a) A keyboard is an input device used to enter data into a computer.

2.(a) CPU stands for Central Processing Unit, the primary component that executes instructions.

3.(a) Antivirus software is used to protect a computer from viruses and other malware.

4.(a) URL stands for Uniform Resource Locator, the address used to access resources on the internet.

5.(a) The Backspace key deletes a character to the left of the cursor.

6.(a) "name@example.com" follows the valid email address format of a username, the "@" symbol, and a domain name.

7.(a) Wi-Fi primarily provides wireless internet connectivity.

8.(a) Ctrl+C is the shortcut key combination used to copy selected text.

9.(a) PDF stands for Portable Document Format.

10.(a) A firewall monitors and controls incoming and outgoing network traffic based on security rules.