Why sorting is done?
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Explain heapsort. What is its complexity?
No. of possible ordered trees with n nodes ? Please give formula (if any).
What is array and its types with example?
Which is better hashmap or arraylist?
What is a pass in bubble sort?
Why using cookie to store session info is a better idea than just using session info in the request?
What do you mean by rehashing?
What are the major data structures used in the network data model?
What are the four types of variables?
What are the drawbacks of array implementation of queue?
Which collection class is thread safe?
Can constructor be static?