SSC Computer Knowledge 1 — Questions and Answers
Question 1: Which of the following is NOT an operating system?
- Windows
- Linux
- Oracle (Correct answer)
- macOS
Correct answer: Oracle
Oracle is a database management system (DBMS), not an operating system.
Question 2: What does 'CPU' stand for?
- Central Processing Unit (Correct answer)
- Computer Processing Unit
- Central Program Utility
- Computer Program Unit
Correct answer: Central Processing Unit
CPU stands for Central Processing Unit, which is the primary component that executes program instructions.
Question 3: Which shortcut key is used to permanently delete a file in Windows without sending it to the Recycle Bin?
- Ctrl+D
- Shift+Delete (Correct answer)
- Alt+Delete
- Ctrl+Delete
Correct answer: Shift+Delete
Pressing Shift+Delete permanently deletes a file, bypassing the Recycle Bin.
Question 4: What is the full form of 'URL'?
- Uniform Resource Locator (Correct answer)
- Universal Resource Link
- Uniform Reference Locator
- Universal Resource Locator
Correct answer: Uniform Resource Locator
URL stands for Uniform Resource Locator, which is the address used to access resources on the internet.
Question 5: Which of the following is an input device?
- Monitor
- Printer
- Speaker
- Keyboard (Correct answer)
Correct answer: Keyboard
A keyboard is an input device used to enter data into the computer; monitor, printer, and speaker are output devices.
Question 6: 1 Kilobyte (KB) is equal to how many bytes?
- 100 bytes
- 512 bytes
- 1000 bytes
- 1024 bytes (Correct answer)
Correct answer: 1024 bytes
1 Kilobyte = 2^10 = 1024 bytes in binary/computing context.
SSC Computer Knowledge 1
Which of the following is NOT an operating system?