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Code reviewMediumcr-p030
Subject CachingLevel Mid–Senior~18 minCommon in Distributed systems interviewsIndustries Software development

Question

Review this caching addition.

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.

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Code to reviewpython
_cache = {} def get_config(key):    if key not in _cache:        _cache[key] = db.fetch_config(key)    return _cache[key]
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