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If there are special characters in a pattern, then we’ve to enclose them in ______

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If there are special characters in a pattern, then we’ve to enclose them in ______

(a) single quotes

(b) double quotes

(c) without any quotes

(d) all quotes

This question was addressed to me in an online quiz.

Query is from grep command topic in portion Filters using Regular Expressions of Unix

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Right option is (b) double quotes

Explanation: We’ve to quote the pattern in double quotes when it contains multiple words or special characters else they will be interpreted in some other way by the shell. If the pattern doesn’t contain multiple words, then there is no need for quoting the patter in any quotes. If the pattern contains only multiple words, then we can quote the pattern in single quotes also.

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