Java Interview Guide : 200+ Interview Questions and Answers - Collection Code Examples

The video tutorial provides an in-depth exploration of Java collections, covering various implementations such as ArrayList, HashSet, TreeSet, HashMap, and TreeMap. It explains operations like adding, removing, and sorting elements, and highlights the use of Comparable and Comparator interfaces for sorting. The tutorial also delves into the functionality of NavigableSet and NavigableMap, as well as the PriorityQueue with natural and custom ordering. Finally, it discusses static methods in the Collections class, offering practical examples and coding exercises to reinforce learning.

What is auto boxing in the context of collections?

Explain how to add an element at a specific index in an ArrayList.

What is the role of the 'contains' method in an ArrayList?

What is the significance of the Comparable interface in sorting collections?

How can you sort a collection using a custom comparator?

What happens when you try to add a duplicate element to a Set?

Describe the difference between a HashMap and a TreeMap.

What methods are available in the NavigableMap interface?

Explain the purpose of the 'poll' method in a priority queue.

How does the Collections class facilitate operations on collection objects?