Differentiate null and void?
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What is a queue in data structure?
What does stack top do?
What is the complexity of selection sort?
Why do we use sorting?
an array t[100] which contains numbers between 1..99. Return the duplicated value. Try both O(n) and O(n-square).
Differentiate between arraylist and vector.
Can value be null in treemap?
What do you mean by selection sort?
What is a comparator function?
What is an acyclic graph?
Write the steps involved in the insertion and deletion of an element in the stack.
If you have to store one lakh objects, what will be a better option- a hash map or an array list?