Answer
Unsubscribe from observables, remove event listeners, clear timers, use WeakMap for caching, and avoid retaining references in closures or global state.
Quick Answer
Memory leaks in frameworks: components subscribing to Observables or adding event listeners without cleaning up on destroy. React: useEffect cleanup function removes listeners. Angular: takeUntilDestroyed() or manual ngOnDestroy unsubscribe. Vue: onUnmounted() cleanup. Long-lived services that cache stale data also leak. Use DevTools heap snapshots to detect growing heap between navigations.
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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