What is long data type?
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What is array and structure?
Define biconnectivity?
How to find the duplicate in an array?
Can we add duplicate keys in a hashmap?
Explain heapsort. What is its complexity?
What is mean by merge sort?
Which is faster hashset or treeset?
What are the different binary tree traversal techniques?
What is a directed graph?
an array t[100] which contains numbers between 1..99. Return the duplicated value. Try both O(n) and O(n-square).
List the types of tree.
What are the parts of root node?