What is the time complexity of hash tables?
The average time complexity for search, insert, and delete operations in hash tables is O(1). However, in the worst case, it can be O(n) if many collisions occur.
What causes collisions in hash tables?
Collisions occur when two keys hash to the same index in the table. This can happen due to a poor hash function or when the table is too small.
How can we handle collisions?
There are several methods to handle collisions, including chaining (using linked lists) and open addressing (probing for the next available slot).
What is a good hash function?
A good hash function should distribute keys uniformly across the hash table to minimize collisions. Common examples include using prime numbers or bitwise operations.
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