Java-Interview-Question

Hey Tea Lovers! We meet after a long time. Today’s post will be a short and cut-to-the-point post about the latest offering (relatively) by Java 17+. Yes, as you read in the title, it is about sealed classes in java. We will go over some of the basics and will give you some pointers that I think fully describes it. So let’s get to it. Introduction of Java’s Sealed Class The sealed class in Java is a new addition to the core library of java since Java 17. It is an introduction to the new keywords, sealed and non-sealed. The sealed class allows one to describe which class/interface can extend/implement the current class/interface. I will be using class throughout the post but it applies to both classes and interfaces in Java. ...

Hey! tea lovers! In this post, we will be discussing how HashMap, the key-value-based data structure, works in Java. And it is one of the most asked interview questions as well. It is the core feature we as a developer use daily. Primarily used for easy and faster access to data based on the key. So let us see how it stores, retrieves and updates the data. I will put more articles under the Simply Explained tag. For now, let us get started with HashMap. So make your cup of tea to sip and code. ...

Hey, Tea Lovers! Starting your data structures and algorithm journey? Trying to solve more LeetCode or HackerRank or want to win Google CodeJam? Then this is the first thing you should know about, Time and Space Complexity of an Algorithm. We will see various ways we figure out the complexity, and how it is useful to determine the efficiency of an algorithm. With this, we can easily find out the Optimal Solution or algorithm among multiple. ...

Hey, Tea Lovers! Today let’s look at the most asked interview question, IS-A.)& HAS-A relationship. Both beginners and experienced people get this question in their interviews. This post is one of the many in the series of Interview Questions, where we don’t just hang you with one line answer, but rather try to explain it so that it gets fits into your head. I know you are in a hurry to prepare for the interview, so I will make this post as short as possible, So prepare your cup of tea to sip and code. ...

Hey, Tea Lovers! Today let’s look at the most asked interview question, Comparable vs Comparator. Both beginners and experienced people get this question in their interviews. This post is one of the many in the series of Interview Questions, where we don’t just hang you with one line answer, but rather try to explain it so that it gets fits into your head. I know you are in a hurry to prepare for the interview, so I will make this post as short as possible, So prepare your cup of tea to sip and code. ...

Hey, Tea Lovers! Today let’s look at the most asked, tricky, and fumbled interview question i.e. What is the difference between final, finally, and finalize in Java? Most beginners face this question. The thing is, only their names are the same the work is completely unrelated. I know you are in a hurry to prepare for the interview, so I will make this post as short as possible. But before reading, prepare your cup of tea to sip and code. ...

Hey! tea lover! This post is not a tutorial, just code samples of different sorting algorithms you can see before going to the interview. I have written the algorithms in Java. There is little to no explanation, just pure simple code for you to quickly glance through it. The purpose of making this is to put all the sorting algorithms Java code in one place only. You can see the whole Data Structure and Algorithms project on GitHub. ...