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The ____ variable stores the name of the file currently being processed.

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The ____ variable stores the name of the file currently being processed.

(a) OFS

(b) FILENAME

(c) NF

(d) ES

The question was asked in an interview for internship.

I would like to ask this question from Various Operations using Awk Command topic in portion Awk – An Advanced Filter & Perl – The Master Manipulator of Unix

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The correct option is (b) FILENAME

To elaborate: awk supports another built-in variable named FILENAME which stores the name of the file, currently being processed.

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