Design Patterns · Junior · Question 60 of 75

Which comments are most valuable?

✓Correct answer: Those that explain why something is done (a constraint, a workaround), not what the code does
2Comments repeating every line
3Commented-out old code

Explanation

If a comment explains what code does, clearer names or an extracted function usually make it unnecessary.

Further reading

Refactoring.Guru: Comments ↗

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