Top 5 JavaScript Data Structure and Algorithm Courses for Beginners to Learn in 2021 - Best of Lot

Hello guys, if you are a JavaScript developer learning Data Structure and Algorithms and looking for the best online course to learn Algorithms and Data Structure in JavaScript, then you have come to the right place. In the past, I have shared free classes to learn JavaScript and data structure Algorithms, and today, I will share the best courses to learn Data Structure and Algorithms. These courses have been created by expert instructors like Colt Steele, Andrei Neagoie, and Stephen Grider and are trusted by thousands of developers. They are also very affordable, especially the Udemy courses you can buy for just $10 on Udemy sales which happens every now and then.

How does Spring MVC Process HTTP Request [Flow]? DispatcherServlet Example Tutorial

One of the common interview questions in Spring MVC is, how does the DispatcherServlet process a request in Spring MVC? or What is the role of DispatcherServlet in the Spring MVC framework? This is an excellent question for any Java or Spring web developer because it exposed the candidate's knowledge about Spring MVC architecture and how its main components like Model, View, and Controller.   The answers to this question show how much you know about the Spring MVC framework and its working. 

5 Best Free Cloud Computing Courses for Beginners to Join in 2021 [UPDATED]

Hello guys, if you want to learn Cloud computing in 2021 (which is really great!!) and looking for the best free resources like online courses to kick start your Cloud Computing journey, then you have come to the right place. In the last, I have shared free lessons to learn AWS, Google Cloud, and Microsoft Azure, and today, I will share free Cloud Computing courses for beginners. Cloud Computing is an essential skill for the modern developer as most of the new development is happening on Cloud and will happen in the Cloud. If you are not familiar with how the Cloud works and with essential Cloud concepts and terminology like IaaS, PaaS, SaaS, compute, storage, network, etc., you are at risk of being left behind. 

Top 5 Free Online Courses to Learn Eclipse and JUnit for Beginners in 2021 - Best of Lot

Both Eclipse and JUnit are two of the essential tools for Java Developers. Eclipse is a Java IDE, Integrated Development environment which allows you to code, run, and debug Java programs from a single window. At the same time, JUnit is a unit testing library that will automatically test your Java code. You can write JUnit tests, and then you can run them automatically using Maven or Gradle plugin at build time. You can further automate your build using Jenkins, which means your Unit test will run continuously and automatically, reporting any break at the earlier possible opportunity.

Top 17 Linux, SQL, and Multicasting Interview Questions Answers for 1 to 5 Years Experienced

Hello guys, If you have worked as a software developer or Java programmer then you know that SQL, Linux, and Networking fundamentals are essential skills for any Java developer, especially for server-side Java programmers. It actually doesn't matter whether you are applying for the job as a Java developer or C++ developer, Python developer or Ruby programmer, SQL and UNIX always have some role to play in your career. It's even essential for people who have less to do with programming like application support guys, business analysts, project managers, and subject matter experts.  Hence, it's imperative for any programmer or IT professional to prepare both SQL and UNIX well before going for any job interview.

What is Diamond operator in Java? How and When to use? - Example Tutorial

The Diamond operator is a relatively new operator in Java which was first introduced in JDK 7  to improve type inference and reduce boilerplate Java coding. It is denoted with a closed angle bracket that resembles the shape of a diamond (<>) and that's why it's called the Diamond operator. If used correctly it can reduce typing and boilerplate coding in Java and result in much cleaner and readable code especially when you use Generics.  

Top 5 Free Data Science and Analysis Online Courses for Beginners to Learn in 2021 - Best of Lot

Hello folks, Data Science and Data Analysis are two of the most in-demand skills in the current technology world. All kinds of companies need them to improve their sales, profit, and overall business process. If you want to learn Data Science and Data Analysis and looking for some free online training courses to start your career, then you have come to the right place. Earlier, I shared the best Data Science courses. In this article, I will share free Data Science courses from Udemy and Coursera for both beginners and experienced programmers. You can join these courses to learn Data Science from scratch. They are also good to fill gaps in your knowledge if you are already doing Data Analysis, and the significant point is that they are completely FREE.

Top 10 Spring Framework Annotations for Java Programmers | Example Tutorial

Hello guys, if you are learning the Spring framework and want to know what are essential Spring annotations you should know then you have come to the right place. Earlier, I have shared the free Core Spring and Spring Boot courses and Spring certification resources for Java developers, and in this article, you will find some of the most common annotations in this article, which is a must for a Java developer to work with Spring. You will also learn what does annotation really does and why should you learn them. There is no doubt that the Spring framework is one of the most popular Java frameworks, and it has made the life of Java developers easy by providing some excellent features in the last 15 years. 

Top 8 Websites to Learn JavaScript Coding for FREE in 2021 - Best of Lot

Hello guys, if you want to learn JavaScript and are looking for the best websites to learn JavaScript programming for FREE, you have come to the right place. Earlier, I shared the best free JavaScript courses and paid JavaScript courses, and in this article, I will list down the best websites to learn JavaScript for FREE. We live in a world of the internet, which is full of resources. You can know whatever you want and that too, without spending too much money. If you're going to learn JavaScript, there are plenty of websites where you can learn JavaScript online for FREE. 

3 ways to sort a List in Java 8 and 11 - Example Tutorial

There are multiple ways to sort a list in Java 8, for example, you can get a stream from the List and then use the sorted() method of Stream class to sort a list like ArrayList, LinkedList, or Vector and then convert back it to List. Alternatively, you can use the Collections.sort() method to sort the list. There is also a sort() method added to the List class itself. The Collections.sort() method is an older one and it's available from JDK 1.0 itself but List.sort() is a new method added in Java 8. This method accepts a Comparator if you want to sort a List in a custom order, otherwise, you can pass null if you want to sort a List on the natural order of their elements. 

5 Free SQL Books For Beginners and Experienced - Download PDF or Read Online

There is no doubt that SQL is one of the most essential skills for Programmers, IT professionals, Software Engineers, Quality Analysts, Project Manager, Data scientists, Database admins, and Business Analysts. I had even mentioned this as one of the top skills in my post about 10 things every programmer should know, if you haven't read that yet, you can read it here, it's completely worth your time. Since many Enterprise applications use the relational database at their backend, like Oracle, Microsoft SQL Server, MySQL, it's crucial to learn SQL to work with those applications and use the data stored on those databases.

Top 5 Free AWS Developer Associate Certification Courses in 2021 - Best of Lot

Hello guys, if you are preparing for the AWS Certified Developer Associate exam and looking for free online courses, then you have come to the right place. In the past, I have shared the free online courses to prepare for AWS Cloud Practitioner and SysOps Administrator certifications. Today, I will share free online training courses to prepare for the prestigious AWS Developer Associate exam. The Exam requires hands-on experience with AWS, but that's not enough, you also need to prepare all the exam topics, and that's where these online courses can help you. These are the best and completely free courses from websites like Udemy, Coursera, freeCodeCamp, and Youtube, and you can use them to prepare for this prestigious AWS cloud certification. 

How Binary Search Algorithm Works? Java Example without Recursion

The binary search algorithm is one of the fundamental Computer Science Algorithms and is used to search an element in a sorted input set. It's much faster than the linear search which scans each and every element and improves performance from O(n) to O(logN) for searching an element in the array. In order to perform the binary search, you need a sorted array, so you can either ask the user to enter the array in sorted order or you should sort the array before performing the binary search. It's also one of the popular algorithms for Programming Job interviews. The interviewer often asks candidates to implement binary search algorithms by hand in their favorite programming languages like Java, C++, Python. or JavaScript.

Java Comparator Multiple Fields Example | Comparator Chaining in Java 8 using Comparing() and thenComparing()

One of the common requirements in Java is to compare objects by multiple fields. For example, if you have a list of CreditCard objects and you want to compare them by their provider and credit limit I mean, first compare them by their providers like VISA, Master, or American Express and if they are from the same provider then compare them by their credit limit, also known as breaking ties. Before Java 8 this wasn't easy because you have to write nested codes to compare multiple fields of an object as there was no easy way to chain multiple Comparators in Java, but things have changed a lot from Java 8.

Top 40 Advanced Java Interview Questions Answers for 3 to 5 Years Experienced Programmers

Hello guys, if you are going for a Java support engineer interview and looking for some frequently asked questions then you have come to the right place. I have shared many posts about Java interview questions in the past but nothing, particularly from the support engineer perspective. Since there are a lot of L1 and L2 support job exists in BFSI (Banking, Finance, and Insurance Industry) and they are also for the longer term, I decided to write this post. In this article, I will share questions to help with technical aspects like the essential skills you need to clear a support engineer interview.

Top 5 Courses to learn System Design and Software Architecture in 2021 - Best of Lot

Software design or System design is one of the tricky concepts to master. You can quickly learn a programming language like Java or Python, but creating software using that programming language is a totally different thing. That's where software design and coding skills come to the rescue. It's actually an art to structure your program, design your modules, specify boundaries and interactions with other parts of the system so that they are easier to read, maintain, and flexible to change. It's one of the most essential skills for a software developer but often gets ignored. If you look for an online course to learn Software design and architecture, you won't find many, forget about good ones.

How to solve java.lang.NoClassDefFoundError: org/springframework/beans/factory/SmartInitializingSingleton in Spring Boot [Solved]

Problem:
I was trying to run a HelloWorld program using Spring Boot when I got this error:

Exception in thread "main" java.lang.IllegalStateException: Could not evaluate condition on org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer due to internal class not found. This can happen if you are @ComponentScanning a springframework package (e.g. if you put a @ComponentScan in the default package by mistake)
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:52)
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:92)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:174)
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:136)

10 Examples to DateTimeFormatter in Java 8 to Parse, Format LocalDate and LocalTime

Parsing and formatting dates are other essential topics while working with date and time in Java. Even though the old Date API had the SimpleDateFormat and DateFormat class to support the formatting of date and parsing texts, they were not simple, or should I say there were just simple in writing the wrong code. You might know that SimpleDateFormat was not thread-safe and quite heavy to be used as a local variable. Thankfully, this has been sorted now with a new LocalDateTime class and DateTimeFormatter class, which has several inbuilt formats.

How to declare and Initialize two dimensional Array in Java with Example

An array of more than one dimension is known as a multi-dimensional array. Two of the most common examples of multi-dimensional arrays are two and three-dimensional arrays, known as 2D and 3D arrays, anything above is rare. I have never seen 4-dimensional arrays, even 3D arrays are not that common. Now the question comes when to use a multi-dimensional array? Any real-life example? Well, 2D arrays are very common on platform games like Super Mario Bros to represent screen or terrain; 2D arrays can also be used to represent structures like a spreadsheet, or to draw board games like Chess, which requires an 8x8 board, Checkers and  Tic-Tac-Toe, which requires 3 rows and 3 columns.

Top 10 Books Every Programmer Should Read

There is a saying that if you learn from your mistakes, you will only going to learn few things, but if you learn from other's mistakes, you can learn a lot of things in a short time, and what could be a better way to learn from someone's experience then reading books. Programming as a career is about constant learning and updating yourself, but unfortunately, there is no right way to begin. Schools and Colleges are far behind when it comes to real-world programming, and every Computer Science graduate is not lucky to work in a company that is great in training. The other viable option is to read books, join online courses, and follow advice from the great programmer and authors who are gone on that path, and learning from the book is the most tried and trusted way of all of them.