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Which of the following keys does not appear in duplicate on a standard QWERTY keyboard?
1. Ctrl
2. Alt
3. Shift
4. Esc

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Correct Answer - Option 4 : Esc

The correct answer is Esc.

  • Esc key does not appear in duplicate on a standard QWERTY keyboard.
  • QWERTY is a keyboard design for Latin-script alphabets.
  • The name comes from the order of the first six keys on the top left letter row of the keyboard (Q W E R T Y).
  • The QWERTY design is based on a layout created for the Sholes and Glidden typewriter and sold to E. Remington and Sons in 1873.

  • Esc is a key found on the top-left corner of a computer keyboard.
  • It allows the user to abort, cancel, or close an operation.
  • For example, if a web page was loading slow on an Internet browser, pressing the Escape key stops the download. 

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