Does hashmap preserve insertion order?
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What is list and its types?
Does list maintain insertion order?
Can we insert null in set?
What is a undirected graph?
Where is binary tree used?
What is a Queue? Explain its operation with example?
What data type is enum?
What is the difference between arraylist and array?
How much time does it take to learn data structures?
Can we add heterogeneous elements into treemap?
What do you mean by the term “percolate up”?
Advanced problems related to Data Structures were asked