Answer
The load factor measures how full a hash table is. When exceeded, resizing and rehashing occur to maintain performance.
Quick Answer
The load factor is the ratio of entries to buckets. When it exceeds a threshold (default 0.72 in many implementations), the collection resizes — allocates a larger array and rehashes everything. This keeps lookup performance near O(1). Pre-size your dictionary with an initial capacity if you know the count.
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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