Will hashmap allow null keys?
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What is binary tree and its types?
Explain the common uses of tree database.
What is data structure and why we need it?
When will you sort an array of pointers to list elements, rather than sorting the elements themselves?
Does treeset allow null values?
What is the difference between arrays sort and collections sort?
Why sorting algorithms are important?
State the different types of linked lists?
which notations are used in evaluation of arithmetic expressions using prefix and postfix forms?
Which collection type is used to maintain uniqueness of data structure?
Can binary tree have 1 child?
Does hashtable allow null values?