I have written a lot of java interview questions and this is index posts for all java interview questions. I will keep adding more interview questions to this post. Table of ContentsCore JavaCore java interview …
This is the index post for Core Java tutorial for beginners as well as for experienced programmer. I have written Core Java tutorial from basic to advanced topics.It will definitely help you learn Java in …
In this post, we will see about Lowest Common Ancestor for n-ary Tree. Problem Given a n-ary tree also known as a Generic Tree and also two nodes. You need to find the Lowest common …
In this post, we will see about Segment Tree in java. Table of ContentsProblemSolutionApproach – I:Approach – II:Efficient Approach :Construction :Range Sum Query :Updation: Problem Consider an Array of Integers, int arr = {a1, a2, …
In this post, we will see how to find the local minima in the array. Table of ContentsProblemSolutionNaive approachEfficient approach Problem An element is local minima if it is less than its neighbors. Solution …
In this post, we will see edit distance problem in java Table of ContentsProblemSolutionAlgorithm:How? Problem Given two strings string1 and string2, String1 is to be converted into String2 with the given operations available in the …
In this post, we will see how to call getters and setters using reflection in java. We have already seen how to invoke method using reflection in java. There are two ways to invoke getter …
In this post, we will see how to add elements to the array. Using Apache’s common lang library You can use varargs add method to add elements to array dynamically. Here are the few add …
In this post, we will see about Sliding Window Maximum in java Problem Given an Array of integers and an Integer k, Find the maximum element of from all the contiguous subarrays of size K. …
In this post, we will see why wait(), notify() And notifyAll() methods are in Object Class And Not in Thread Class. This is one of the most asked java multithreading interview questions. You might know …
In this post, we will see how to sort HashSet in java. HashSet is a collection which does not store elements in any order. You might come across a situation where you need to sort …
In this post, we will see about the difference between equals and == in java. This is most asked java interview question for fresher or 2-year experienced java developer and it might be confusing sometimes. …