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1 BASIC COMPUTER MCQS

Which control key combination is used to undo the last action?

  • Ctrl + Z
  • Ctrl + U
  • Ctrl + D
  • Ctrl + A
Correct Answer: A. Ctrl + Z

Detailed Explanation

Ctrl + Z is the standard keyboard shortcut used to undo the last action on a computer. It is one of the most commonly used control key combinations across various software programs, including Microsoft Word, Excel, PowerPoint, graphic design tools like Photoshop, and many more. Whether you accidentally delete text, move a file, or make an unwanted change, Ctrl + Z will reverse your last step instantly.


For example:




  • If you mistakenly delete a sentence in a Word document, pressing Ctrl + Z will bring it back.




  • In a photo editor, if you apply a filter and don’t like it, Ctrl + Z will remove the change.




  • In file management, if you move or rename a file and want to revert the action, Ctrl + Z is the quickest solution.


    Let’s break down the other options:




    • Ctrl + U is usually used to underline selected text.




    • Ctrl + D is commonly used to bookmark a page in browsers or duplicate items in design tools.




    • Ctrl + A selects all items in a document or window.




    Among these, only Ctrl + Z serves the purpose of undoing the most recent action, making it a vital tool for quick corrections and error handling.



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