Code reviewHardcr-g414

Subject Thread safetyLevel Senior–Staff~30 minCommon in Concurrency interviewsIndustries Software development

Question

Review this Java background loader. One thread runs `loadLoop()`; request threads call `current()`.

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

1class ConfigCache {2  private Map<String,String> config = Collections.emptyMap();3 4  void reload(Map<String,String> fresh) {5    config = fresh;          // swap reference6  }7 8  String get(String key) {9    return config.get(key);  // read10  }11}

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