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 Coin Change problem in java. Problem Given an Amount to be paid and the currencies to pay with. There is infinite supply of every currency using combination of …
In this post, we will see about Bellman ford algorithm in java. Bellman Ford Algorithm is used to find shortest Distance of all Vertices from a given source vertex in a Directed Graph. Dijkstra Algorithm …
Freestyle means improvised or unrestricted. A freestyle project in Jenkins is a project that spans multiple operations. It can be a build, a script run, or even a pipeline. According to the official Jenkins wiki, …
Problem Given a Generic Tree, Serialize and Deserialize it. Serialization is a basically a representation of a tree in a String format which takes much lesser space than storing the tree itself. Deserialization is constructing …
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 …