2020
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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UNESCO
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UNICEF
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FICCI
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WHO
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Detailed explanation-1: -The old-style backquotes ‘ ‘ do treat backslashes and nesting a bit different. The new-style $() interprets everything in between ( ) as a command. The new-style $() applies to all POSIX-conformant shells. As mouviciel pointed out, old-style ‘ ‘ might be necessary for older shells.
Detailed explanation-2: -Command substitution is a mechanism that is followed by programmers in a bash script. In this mechanism, the output of a command replaces the command itself. Bash operates the expansion by executing a command and then replacing the command substitution with the standard output of the command.
Detailed explanation-3: -Stack Exchange is a network of question-and-answer (Q&A) websites on topics in diverse fields, each site covering a specific topic, where questions, answers, and users are subject to a reputation award process. The reputation system allows the sites to be self-moderating.