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Question

The following command will_________

!! tr ‘[a-z]’ ‘[A-Z]’

a.

throw an error

b.

undefined behaviour

c.

changes the case of current line from lower to uppercase

d.

changes the case of current line from upper to lowercase

Posted under UNIX

Answer: (c).changes the case of current line from lower to uppercase

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Q. The following command will_________ !! tr ‘[a-z]’ ‘[A-Z]’

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