What is a matrix?
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What is the Role of push() and pop() method?
Define indegree of a graph?
What is difference between tree and binary tree?
Which is faster arraylist or hashmap?
What is the most used data structure?
Does linkedhashset allow duplicates?
Is treeset synchronized?
What is the need for priority queue?
What do you mean by sorting?
How does dynamic memory allocation help in managing data?
Define level of the tree?
Stack can be described as a pointer. Explain.