Question

what is undo?
nhi chalega usko mat samjhao . vo aa jayegi​

Answer 1

Answer:

Undo is an interaction technique which is implemented in many computer programs. It erases the last change done to the document, reverting it to an older state. In some more advanced programs, such as graphic processing, undo will negate the last command done to the file being edited.

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Answer 2

unfasten, untie, or loosen (something). 'the knot was difficult to undo' synonyms: unfasten, unbutton, unhook, untie, unlace, unbind, unfetter, unshackle, unmanacle, unbridle, unlock, unbolt, uncouple, unhitch, unlink, unclick, loosen, loose, disentangle, disentwine, extricate, release, detach, free, set free, liberate, open, unseal, unwrap, let out, disconnect, disjoin, disengage, disunite, separate.

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