Answer
Memory leaks occur due to unused global variables, unremoved event listeners, unclosed timers, or improper caching.
Quick Answer
Memory leaks in Node.js happen when objects accumulate in memory and are never garbage collected because something still holds a reference. Common causes: closures capturing large objects, event listeners never removed (emitter.on without emitter.off), global caches growing without bounds, and circular references in certain situations.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ