Computer Knowledge Questions and Answers

21. The famous social media website facebook is invented by-

  • Bill Gates.
  • Charles Babbage.
  • Mark Zuckerberg.
  • Salman Khan.

Answer with Explanation

Answer: Option C

Explanation: No explanation for this question.

22. Compact disc is an example of-

  • Main memory.
  • Cache memory.
  • Secondary memory.
  • none of these.

Answer with Explanation

Answer: Option C

Explanation: No explanation for this question.

23. ‘CTRL + A’ – this keyboard shortcut is used for-

  • Selecting all the things of the current documents.
  • Selecting the header of the current document.
  • Selecting the Capital words of the current documents.
  • Selecting only the letters of the current documents.

Answer with Explanation

Answer: Option A

Explanation: No explanation for this question.

24. The full form of DBMS is-

  • Direct Beta Management System.
  • DataBase Management System.
  • Database Management Synchronization.
  • Digital Beta Management System.

Answer with Explanation

Answer: Option B

Explanation: No explanation for this question.

25. Inkjet printer is a-

  • Impact Printer.
  • Non-Impact Printer.
  • Page Printer.
  • None of these.

Answer with Explanation

Answer: Option B

Explanation: Inkjet and Laser printers are non-impact printers. Non-Impact Printers are soundless printers. In Non-Impact printers the printer head does not touch the paper.