You want to write a bash condition that checks if a file log.txt exists AND is either writable OR executable. Which is the correct syntax inside [ ]?

hard🚀 Application Q8 of 15

Bash Scripting - Conditionals

You want to write a bash condition that checks if a file log.txt exists AND is either writable OR executable. Which is the correct syntax inside [ ]?

A[ -e log.txt && ( -w log.txt || -x log.txt ) ]

B[ -e log.txt -a \( -w log.txt -o -x log.txt \) ]

C[ -e log.txt -o -w log.txt -a -x log.txt ]

D[ -e log.txt && -w log.txt -o -x log.txt ]

Step-by-Step Solution

Solution:

Step 1: Understand operator precedence and grouping
Inside [ ], use \( and \) to group conditions. AND is -a, OR is -o.
Step 2: Write condition for file exists AND (writable OR executable)
Correct syntax is [ -e log.txt -a \( -w log.txt -o -x log.txt \) ] to group OR inside AND.
Final Answer:
[ -e log.txt -a \( -w log.txt -o -x log.txt \) ] -> Option B
Quick Check:
Group OR with \( \) inside [ ] [OK]

Quick Trick: Use \( \) to group OR inside AND in [ ] [OK]

Common Mistakes:

MISTAKES

Missing grouping parentheses
Using && or || inside [ ]
Wrong operator order

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You want to write a bash condition that checks if a file log.txt exists AND is either writable OR executable. Which is the correct syntax inside [ ]?

Step 1: Understand operator precedence and grouping

Step 2: Write condition for file exists AND (writable OR executable)

Final Answer:

Quick Check:

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