Answer
Collisions occur when two keys map to the same bucket. They are handled via chaining or probing.
Good hash code implementation minimizes collisions.
Quick Answer
Collisions happen when two different keys produce the same hash bucket. .NET's Dictionary handles this with chaining — multiple entries in the same bucket form a linked list. Too many collisions slow lookups from O(1) to O(n). Implement GetHashCode() to spread values evenly across buckets.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ