What are trees in data structures?
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Explain multiply linked list in short.
Why null is not allowed in treemap?
What are red-black trees?
Define a priority queue?
Explain the types of linked lists.
Can arraylist store int?
What happens if we put duplicate key in hashmap?
What is the difference between for and foreach loop?
How do you find the size of an arraylist?
When will you sort an array of pointers to list elements, rather than sorting the elements themselves?
What is the difference between the hash table and hash map?
Which list does not allow duplicates?