What are the different types of collections?
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Does arraylist allow null values?
“int a[] = new int[3]{1, 2, 3}” – This a legal way of defining the arrays?
Define leaves?
What is red black tree in data structure?
Is queue fifo or lifo?
How do you sort an array by value?
What is a class user?
What is the function of stack?
Is map a data structure?
Which collection type is used to maintain uniqueness of data structure?
Can sets contain duplicates?
What is a graph?