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In this video I explain one of the most important (and most commonly asked) Java interview topics: Comparable vs Comparator.

Lecture Resources ...

(16:38) What is a PriorityQueue, and how does it work? (17:36) What is a WeakHashMap, and when should you use it? (18:13) ...

... in Java Modified Dijkstra Algorithm Why we start with probability = 1.0 PriorityQueue with custom comparator Common mistakes ...

A queue that's often forgotten, but very useful. PriorityQueue is useful for solving problems with task schedulers, graphs ...