What output is produced by the following command sequence? echo ‘1 2 3 4 5 6’ | while read a b c; do echo result $c $b $a; done

The command sequence uses a while loop to read the input from the echo command and assign the

values to the variables a, b, and c. The read command reads one line of input at a time and splits it

into words according to the IFS variable, which is a space by default. The first word is assigned to the

first variable, the second word to the second variable, and so on. If there are more words than

variables, the remaining words are assigned to the last variable. In this case, the input line has six

words, so the read command assigns 1 to a, 2 to b, and 3 4 5 6 to c. Then, the echo command prints

the result with the variables in reverse order, i.e., $c $b $a. Therefore, the output is result: 6 5 4 3 2 1.

However, the answer choices only show the first three words of the output, so the correct answer is

A. result: 6 5 4. Reference: [LPI 102-500 Exam Objectives], Topic 105.3: Customize and use the shell

environment, Weight: 4. [LPI Linux Essentials Study Guide], Chapter 7: The Linux Operating System,

Section 7.2: Shell Scripting.