Is hashmap ordered?
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Define non-terminal nodes in a tree?
Define a linear data structure.
Which is faster array or linked list?
Name few concurrent collection classes?
State the properties of a binary tree?
What does args stand for?
Why do we need arrays if all the operations that are performed on arrays can be performed on arraylist?
What are linked lists good for?
What is a dequeue?
Which collection class is thread safe?
What is the best case for bubble sort?
Does treemap allow duplicate keys?