What is data structure and why it is important?
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Differentiate between hashset and hashmap.
Can treemap have duplicate values?
Is null a binary search tree?
What is comparable interface?
Name few classes that implement collection interface?
Explain in brief a linked list.
What are the different types of linked list?
How would you use qsort() function to sort the name stored in an array of pointers to string?
What are the tasks performed during preorder traversal?
How would you implement two stacks using a single array?
How do you clear a stack?
What is sorting and classifying?