[Solved] What is wrong with this Rubocop command?rubocop --format json --out report.txt — Ans: Output file extension should be .json, not .txt | Ruby

Ruby - Ecosystem and Best Practices

What is wrong with this Rubocop command?

rubocop --format json --out report.txt

AThe --format option is invalid

BCommand is correct and will run successfully

CMissing the --config option

DOutput file extension should be .json, not .txt

Step-by-Step Solution

Solution:

Step 1: Understand format and output options
The --format json option outputs JSON data, so the output file should have a .json extension.
Step 2: Check command validity
The command syntax is valid, but saving JSON output to a .txt file is misleading and may cause confusion.
Final Answer:
Output file extension should be .json, not .txt -> Option D
Quick Check:
Match output file extension to format [OK]

Quick Trick: Match --format with output file extension [OK]

Common Mistakes:

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What is wrong with this Rubocop command?