Why hashtable is faster than arraylist?
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Is treemap thread safe?
Which is faster quick sort or merge sort?
What do you mean by union-by-weight?
Define rehashing?
Is hashmap a collection?
Why do we need searching algorithms?
What is complexity of quicksort?
Explain binary search tree?
What is the minimum number of queues needed when implementing a priority queue?
Define collision in hashing?
Is array a data type?
How do you sort an arraylist?