Code reviewMediumcr-g045

Subject Null handlingLevel Mid–Senior~20 minCommon in Code quality & review interviewsIndustries Software development

Question

Review this Java helper that returns whether a feature flag is enabled for a user.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

Learn the concepts

Talk through your review

Code to reviewjava

1Map<String, Boolean> flags;2 3boolean isEnabled(String userId) {4    Boolean v = flags.get(userId);5    return v;6}

Run or narrate your approach, then ask the coach.