Question at position 9 Given the following shell variable assignments, a=2; b=5; c=10 Which of the following conditions is true? [ $a –eq 3 –o $b –ge 5 ][ $b –gt 5 ][ $c = (3 + 7) ][ a –eq 2 ]

Question

Question at position 9  Given the following shell variable assignments, a=2; b=5; c=10 Which of the following conditions is true? [ $a –eq 3 –o $b –ge 5 ][ $b –gt 5 ][ $c = (3 + 7) ][ a –eq 2 ]

BlackTom AI · Accepted Answer

We start by restating the scenario: a=2; b=5; c=10, and we must evaluate each shell test condition.
Option 1: [ $a –eq 3 –o $b –ge 5 ]
Here, the first part tests if a equals 3, which is false since a=2. The second part tests if b is greater than or equal to 5, which is true since b=5. The -o operator means logical OR, so the overall expression is true because at least one side is true.
Option 2: [ $b –gt 5 ]
This checks if b is greater than 5. Since b=5, the comparison is false. There is no other part to rescue the truth value, so the whole condition is false.
Option 3: [ $c = (3 + 7) ]
This attempts to compare c to the string (3 + 7). In POSIX test, without arithmetic expansion, the right-hand side is treated as a literal string. Since c is 10, the string "10" does not equal the string "(3 + 7)", so this evaluates to false. Also, even if arithmetic expansion occurred, the syntax would require $((3+7)) and the current form does not perform that arithmetic expansion.
Option 4: [ a –eq 2 ]
Here, the left-hand side is the literal character a, not the value of the variable a (which would be $a). Since a is not substituted, the test tries to perform numeric comparison -eq on the string "a", which is invalid for integer comparison and typically yields an error, making the condition false in practical shell execution. Additionally, even if it were parsed as a string, -eq is an arithmetic operator, not a string comparison, so this is semantically incorrect.
In summary, Option 1 yields a true result due to the second sub-condition being true, while Options 2, 3, and 4 fail to be true for the given variable values and typical test semantics. Thus, the only true condition among the choices is the first one.

Question at position 9 Given the following shell variable assignments, a=2; b=5; c=10 Which of the following conditions is true? [ $a –eq 3 –o $b –ge 5 ][ $b –gt 5 ][ $c = (3 + 7) ][ a –eq 2 ]

View Explanation

Log in for full answers

Similar Questions

Shell command (1 mark)How many lines will be output by the following shell command? cat data.csv | awk -F’,’ ’rand()<9/10 {print $9}’[Fill in the blank]

To execute a Unix shell script TEST.SH, you may use

A UNIX shell script program file is

You want to write a shell script that: Creates a directory called backup, if it doesn't already exist, and Copies all .txt files from the current directory into the backup directory. Which of the following code snippets (if any) will achieve this?

You want to write a shell script that: Creates a directory called backup, if it doesn't already exist, and Copies all .txt files from the current directory into the backup directory. Which of the following code snippets (if any) will achieve this?

The purpose of code "#! /bin/sh" at the beginning of a Unix script is

In a Unix shell script, what command is used to accept user's input?

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler