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A user-defined variable is initialized to ____

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A user-defined variable is initialized to ____

(a) zero

(b) zero or null string

(c) null

(d) operator

This question was addressed to me in an internship interview.

Query is from Various Operations using Awk Command topic in portion Awk – An Advanced Filter & Perl – The Master Manipulator of Unix

1 Answer

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Best answer
Right answer is (b) zero or null string

The best explanation: A user-defined variable needs no initialization. It is implicitly initialized to zero or null string and awk has a mechanism of identifying the type and initial value of a variable.

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