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Top 40 Binary Tree Coding Interview Questions for Programmers

Hello guys, if you are preparing for coding interviews and want to master tree-based questions then you have come to the right place. A tree is one of the most important data structures because it allows you to store hierarchical data as opposed to an array and linked list which allows storing linear data. That's why knowledge of tree data structure is very important from an interview point of view. A lot of programmers and my readers have been asking me to share some binary tree-based coding interview questions, just like I have done for the array, linked list, string, software design, patterns, hash table, and data structure in general. 

Top 30 OOP (Object Oriented Programming) Interview Questions Answers in Java

Java is an object-oriented programming language and you will see a lot of object-oriented programming concept questions in Java interviews. The classic questions like the difference between an interface and abstract class are always there but from the last couple of years more sophisticated questions based upon advanced design principles and patterns are also asked to check the OOP knowledge of the candidate. Though, Object-oriented programming questions are more popular on Java interviews for 1 to 3 years experienced programmers. 

Top 10 Object Oriented Programming Concepts Every Programmer Should Learn

Object-oriented programming (OOP) is a programming style that is used to solve the problem by thinking in terms of real-world objects like Car, Bag, Animal, etc. It also helps you to organize code, which makes it easier to understand and solve complex programs. Objects hold information about state and behavior. States are the characteristics of the object, or the words you would use to describe it, and usually, take the form of is or has descriptors. A computer is either on or off, a chair has four legs, and you have a name. Behaviors are the things the object can do, or the actions the purpose can perform and are usually verbs that end in ing like You are sitting, using a computer, and reading this article.

Can You Override Private Method in Java? Inner Class?

No, you cannot override private methods in Java, private methods are non-virtual in Java and access differently than non-private one. Since method overriding can only be done on derived class and private methods are not accessible in a subclass, you just can not override them. By the way, one more possibility of overriding private methods in an inner class, since private methods are accessible in an inner class, and that’s why it is one of the tricky java interview questions. Anyway, this will also not work because private methods are bonded during compile time and only Type (or Class) is used to locate a private method.

Top 10 Projects You Can Build to Learn Web Development in 2023

Hello guys, if you want to learn web development in 2023 then let me tell you that there is no better way to learn web development than building projects. Creating real world application give your experience which you can mention in your resume. They also expose you to challenges which real projects face like authentication, authorization, security, logging, performance etc. You also tend to remember things longer when you actually use it. So if you have learned API and methods by watching courses but haven't used them on any project then you will most likely forget them but if you use them in any project, you will retain knowledge for a long time. That's why I have been saying to may readers to build projects in 2023. 

Top 5 Projects You Can Build to learn Android App Development in 2023

Learning any programming language is not that easy as you need to practice a lot and write more and more code to gain experience. Reading books and articles does not make you a professional developer unless you test your skills by building real-world projects that showcase your knowledge and these concepts applied also on creating android apps. Watching YouTube tutorials or reading articles without trying yourself is not a good idea, many of you forget how to implement what he studied after some time because he never created projects and that’s not what you want so once you understand the basics you have to create at least a simple app.

Top 10 Projects You Can Build to Learn Java in 2023

Hello guys, from my 20 years of experience as a Java developer, from building games with J2ME to writing server side, multi-threading Java servers,  I can say that building project is the best way to learn Java but you also need to choose the right project because if you choose a trivial project you will not learn anything and at the same time, if you choose a hard project, you will frustrate and not complete it and not learn anything. That's why, its very important to choose the right kind of project when you learning Java. These project will not only complement your learning but also challenge you but not set an impossible task for you. Which means, you will learn and also have fund building them. If you are now looking for best Java Project ideas for beginners then you have come to the right place. 

How to Fix Consider defining a bean of type 'package' in your configuration [Solved]

Hello and welcome to another blog post. Today we are going to take a look at one of the most frequently appearing errors in the Spring Boot application. I’m sure most of us have faced a similar issue while working with the Spring Boot application, and the error is ‘consider defining a bean of type package in your configuration’. In general, The error "Consider defining a bean of type 'package' in your configuration" occurs when Spring Boot is unable to find a bean of a specific type that is required by your application. In this article, we will take an in-depth look at why this error appears in the first place. Moving ahead we will learn how to fix this issue. So without further ado let’s jump into it.

How to use Spring Boot and Thymyleaf in Java Web Application? Example Tutorial

Hello guys, if you are looking for a Spring Boot and Thymyleaf example, tutorial, or a project then you have come to the right place. Thymyleaf is one of the most popular, modern, server-side Java template engine to generate HTML and XHTML content. Earlier, I have shared Spring Boot + Reactjs project, as well a complete project to create Spring Boot + REST and Spring Boot + Microservices and in this tutorial, you will learn about how to create a spring boot and thyme leaf application using the h2 database.  So before moving to an example, let's discuss what is thymyleaf? Thymeleaf is a web application development library based on Java. It offers excellent support for providing XHTML/HTML5 in web applications.