Can an arraylist be null?
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How do you find the index of an element in an arraylist?
applications of stacks and their uses?
What is a B tree?
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Define threaded binary tree. Explain its common uses
What is a hashset?
Is array a data type?
You are given a singly linked list. How would you find out if it contains a loop or not without using temporary space?
How many types of data structure are there?
Can you store different types in an array?
State the difference between primitive and non-primitive data types?
Is hashtable throw concurrentmodificationexception?
What is collections singletonlist?