Linux Search Pattern Question: Download Search Pattern PDF

How can you search for blank line in a file?
a) $ grep " " file
b) $ grep "^$" file
c) $ grep [" "] file
d) $ grep [^$] file

d) $ grep [^$] file

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Indicate the right option to search for BOB, Bob, BOb or BoB? a) grep -i Bob files b) grep 'B[oO][bB]' files c) grep '[BOB]' files d) grep -v 'Bob' files	Which option of grep displays the line number as well? a) -v b) -l c) -n d) -E