Friday, October 22, 2021

Top 5 Spring Microservices Courses with Spring Boot and Spring Cloud in 2021 - Best of Lot

Microservices is the new buzzword in software development word and everybody is talking about it, but it's been in practice for quite some time especially in the form of RESTful web services. The idea of Microservices is simple, breaking a big monolithic application that contains everything from UI to service layer to database into small chunks of applications that are loosely coupled and can work on their own. For example, in a company like Uber, you could have several applications providing different services e.g. discovering when a driver is online or a passenger is searching for a cab, finding a route, traffic, and handling payments. These small applications are known as Microservices.

Top 5 Java Multithreading and Concurrency Courses for Experienced Programmers in 2021 - Best Of Lot

If you are a Java developer and looking for some awesome resources e.g. books and courses to improve your multi-threading and concurrency skills in Java then you have come to the right place. In the past, I have shared books and tutorials on Java Concurrency and Multithreading, and in this article, I am going to talk about some of the best free and paid courses to learn multithreading and concurrency in Java. You can join these free courses to improve your understanding of Java Concurrency and Multithreading. It's one of the most important skills for Java developers as almost all the companies who interview Java developers pay particular attention to their knowledge and experience in this area.

Top 5 Courses to Prepare for Frontend Interviews in 2021 - Best of Lot

Hello guys, if you are preparing for a frontend developer interview and looking for the best interview preparation resources like online courses, books, and tutorials then you have come to the right place. Earlier, I have shared the best coding interview preparation courses and books, and in this article, I am going to share the best  Frontend developer interview courses. Web development is generally divided into two parts - frontend (client-side) development and backend (server-side) development. A web developer can either be a master in front-end development or backend development. 

Top 5 Apache Kafka Courses to learn Online in 2021 - Best of Lot

Hello guys, you might have heard about Apache Kafka, the next generation, Big Data messaging system which is handling billions of messages per day on companies like LinkedIn, Uber, Airbnb, Twitter, etc. It's a revolutionary technology and perfect for today's mission-critical application which has so much data to process and analyze. Since last year, I have been sharing a lot of resources like books, courses, and tutorials to learn these sunrise technologies so that you can aware of these and learn them to make yourself more valuable or jump into some exciting career path. For example, In the past, I have shared some awesome courses on Big Data, Spark, and Hadoop and many of my readers requested me to share similar suggestions for Apache Kafka.

How to check for Null in SQL Query? IS NULL Example Tutorial

One of the most common SQL Interview questions on Programming interviews is to select some rows from a table that also contains null values. Since many SQL developers are used to using = and != operator on WHERE clause, they often tend to forget the fact that column allows NULL or not. Using = or != is perfectly fine if your column has NOT NULL constraint and you know for sure that there are no NULL values in that column, but it does contain NULLs then your SQL query will return the incorrect result at times. This is one of the most common mistakes but at the same time hard to find SQL bugs if it managed to get into the real environment. In this article, you will learn the right way to check NULL values in SQL queries using IS NULL and IS NOT NULL predicates.

Top 5 Courses to learn Quarkus, MicroNaut, DropWizard, and Vert for Java Microservices in 2021 - Best

Hello guys, if you create Microservices in Java and want to explore frameworks like DropWizard, MicroNaut, and Quarkus, you have come to the right place. In the past, I have shared the best Microsercies courses with Spring Boot and Spring Cloud, and today, I will share the best online lessons to learn Dropwizard and Micronauts. These are the best online courses and tutorials you can get to know this helpful technology. Unfortunately, not many online courses are available, but API docs and guides are also handy; along with these courses, you can read them.

Thursday, October 21, 2021

Top 12 Hibernate Interview Questions and Answers for Java Developers [Solved]

Hibernate Interview Questions are asked on Java J2EE Interviews, mostly for web-based enterprise application development roles. The success and acceptability of Hibernate framework on the Java world have made it one of the most popular Objects Relational Mapping (ORM) solutions in the Java technology stack. Hibernate frees you from database-specific coding and allows you to focus more on utilizing powerful object-oriented design principles to implement core business logic. By using Hibernate you can switch between databases rather easily and also take advantage of out-of-box caching facilities provided by Hibernate, in terms of second-level cache and query cache.

Top 5 Project-Based Courses to learn Coding with Java, Python, and JavaScript in 2021 - Best of Lot

Hello guys, if you are aiming to learn programming and code in 2021 with Java, Python, or JavaScript, the top 3 programming languages of the world then I suggest you join a project-based course. These are the courses where you will learn things by doing and I think that's the best way to learn programming and coding. Reading a book is Ok, watching videos are also Ok but they will not make you a Programmer or Coder, you must code to become a coder and these project-based courses give you that opportunity.

How to Remove Leading/Trailing White Space from a String in SQL Server? LTRIM, RTRIM Example

Unlike Java, Microsoft SQL Server 2008, 2012, 2014,  and even the latest version don't have a built-in trim() function, which can remove both leading and trailing space from the given String. But, SQL Server does have two built-in functions LTRIM() and RTRIM() to remove leading and trailing space. The LTRIM() function removes space from the left side of String so you can use it to get rid of leading space, while RTRIM() removes white-space from the right side of String so you can use it to delete trailing space. You can even combine these two methods to create your own TRIM() method in SQL SERVER e.g. LTRIM(RTRIM(column)) will act as a TRIM() method because it removes both leading and trailing space.

Top 5 Online Courses To Learn Computer Security in 2021 - Best of Lot

Computer security is a complex field of learning but must for everybody learn to protect themselves and their companies from letting bad people access your sensitive information they shouldn’t access. We always hear in the newspaper how evil people harm companies and people and make the world lose billions of dollars every year. It looks like bad people are winning the battle against giant companies and beginner people in security. Still, you can change that by taking some courses that will teach you at least the basics of computer and network security and how these guys can access your computer and information using many techniques such as social engineering and stopping them.

Top 21 Tech Skills Java Developers Can Learn in 2021

Hello guys, recently I was doing some research on what skills Java developers should learn in 2021 to become a better developer and give their career a boost and I found some interesting skills like Kafka and  Elastic Search, apart from obvious ones like Spring Boot and Microservices. One of my favorite places for doing such research is examining Job listings on LinkedIn from different companies like Investment banks, Service-based companies, startups, and mid-tier companies where Java is used extensively. When I saw those skills, I can immediately tell that those are really useful and worth sharing with you guys, as I have often seen those skills playing important roles while hiring Java developers.

Top 5 React and Redux Courses to Learn Online in 2021 - Best of Lot

If you are a Web developer or someone passionate about web development and looking for some awesome courses to learn React or React JS, a popular JavaScript framework to develop a component-based user interface then you have come to the right place. Facebook's React library has taken the front-end development world by storm. More and more people have started using React even in favor of Google's Angular, another popular front-end development framework. Well, I am not going into the classic debate of Angular vs React as both the framework has their own advantage and disadvantage but if you have chosen to learn React, you have made the right decision.

Wednesday, October 20, 2021

Top 10 Udemy Courses for Python and JavaScript Programmers in 2021 - Best of Lot

Hello guys, Udemy, one of the most popular online learning platforms, is known for its sale where you can buy a $200 course for just $10, and they are rerunning a deal. It's actually an excellent time to buy some quality courses as you won't get another chance to buy the course at a price as low as $9.9, but the big question is which courses you should buy on Udemy in 2021? I always purchase courses from the reputed instructor and teach evergreen and in-demand skills like Java, Python, Microservices, Docker, Kubernetes, and AWS. I generally buy a lot of courses in Udemy sales and then access them whenever I need them. Though, I must warn you Udemy is addictive, and I often buy more classes than I need, so beware of that and buy courses you need now or shortly.  

Difference between CAST, CONVERT, and PARSE function in Microsoft SQL Server

Though all three, CAST, CONVERT, and PARSE are used to convert one data type into another in SQL Server, there are some subtle differences between them. The  CAST method accepts just two parameters, expression, and target type, but CONVERT() also takes a third parameter representing the format of conversion, which is supported for some conversions, like between character strings and date-time values. For example, CONVERT(DATE, '2/7/2015', 101) converts the character string '2/7/2015' to DATE using DATE format 101, representing United States standard.

Top 5 Courses to Learn Scikit-Learn Library in 2021 - Best of Lot

Hello folks, if you want ot learn Scikit-Learn library and looking for the best resources like online courses and classes then you have come to the right place. Earlier, I have shared the best Python courses as well as the best courses to learn Data Science and in this article, I am going to share the best courses to learn Scikit-Learn library, one of the most popular Python libraries for Machine Learning along with TensorFlow, Keras, and Pytorch. Scikit-learn provides a selection of efficient tools for machine learning and statistical modeling including classification, regression, clustering, and dimensionality reduction via a consistent interface in Python and it is one of the essential skills for professional Data scientists and Machine Learning engineers. 

Difference between Abstraction and Encapsulation in Java? OOP Question Answer

Both Abstraction and Encapsulation are two of the four basic OOP concepts which allow you to model real-world things into objects so that you can implement them in your program and code. Many beginners get confused between Abstraction and Encapsulation because they both look very similar. If you ask someone what is Abstraction, he will tell that it's an OOP concept which focuses on relevant information by hiding unnecessary detail, and when you ask about Encapsulation, many will tell that it's another OOP concept which hides data from the outside world. The definitions are not wrong as both Abstraction and Encapsulation do hide something, but the key difference is on intent.

Recursive Binary Search Algorithm in Java - Example Tutorial

The binary search algorithm is one of the most famous search algorithms in computer science. It allows you to search a value in logarithmic time i.e. O(logN), which makes it ideal to search a number on a huge list. For example, in order to search a number in a list of 1 million numbers will take around 210 comparisons compared to 1 million comparisons required by the linear search algorithm. The only thing is that the list must be sorted before you can use a binary search algorithm and it must support index-based search. That's why binary search is often implemented using an array because doing a binary search with a linked list will not be fast because it doesn't provide index-based access i.e. O(1) access. You have to traverse to that element to read its value in the linked list which is O(n), effectively reducing the performance of binary search to a sequential search algorithm.

Top 5 Courses to learn JVM Internals, Memory Management, GC and Performance Tuning in Java in 2021

For a senior Java developer, it's essential to know how JVM works and how to troubleshoot issues with respect to memory, most notably memory leaks in Java applications and servers like Tomcat. You might be thinking, how come memory leaks in Java? Isn't memory is managed by JVM and Garbage collector? Well, that's true, but poor coding or just a bit of carelessness can cause memory leaks in Java. If you don't know how to configure JVM, troubleshoot memory-related problems on the heap, and stack, you will struggle at a higher level. That's why it's essential for experienced Java developers to spend some time learning these advanced skills as their experience grows.

Tuesday, October 19, 2021

Top 10 Courses to Learn JavaScript in 2021 - Best of Lot

There is no doubt that JavaScript is the most popular programming language at this moment, and it's also confirmed by StackOverFlow's Survey. You can build static websites, web applications, native mobile applications (yes, you can do that too), desktop applications, and even server-side applications in JavaScript. It also makes you a hundred times more employer as there are tons of web development jobs out there. Because of that, more and more developers are learning JavaScript to become web developers.

Top 5 Free Cyber Security Courses for Beginners to Learn in 2021 - Best of Lot

Hello guys, if you want to learn Cyber Security and start your career as a SEcurity expert or just want to improve your knowledge about Cyber Security, Information Security, Web Servuciry, and Computer Security then you have come to the right place. Earlier, I have shared the best Cyber Security Courses and best Web Security courses and in this article, I am going to share free online courses to learn Cyber Security, This is in line with your demand as many people asked me to share free courses for Cyber Security when I shared the best-paid courses. So, here we go, In this article, I have compiled free Cyber Security courses from Udemy, Coursera, and edX and they are absolutely free to learn and join. 

Top 6 SQL Query Interview Questions for Programmers and Data Scientists - Best of Lot

SQL, a short form of Structured Query Language is one of the essential skills in today's programming world. No matter whether you are a Java developer, C++ developer or Python developer, you must know how to write SQL queries. Every programming job interview has at least one or two questions that require you to write SQL queries for a given requirement and many developers struggle there. It's easy to answer theoretical questions like what is the difference between clustered and non-clustered index (see) or what is the difference between correlated and non-correlated subqueries (see), but when it comes time to actually write SQL queries to solve problems, it's not that easy, especially if you haven't done your homework and practice.

3 Ways to Prevent Method Overriding in Java - Private, Static and Final Method Example Tutorial

Every Java programmer knows that final modifier can be used to prevent method overriding in Java because there is no way someone can override final methods; but, apart from final modifier, is there any other way to prevent method overriding in Java? This was the exact question, asked to one of my friend in a recent Java interview at one of the leading Investment bank. I guess, he was lucky to get this question because he already knows those tricks and was able to answer it quickly. When he told me about his experience,  I didn't understand why someone ask this question? What is the purpose? What they were trying to find out? I can understand if they have asked what's the best way to prevent method overriding in Java, or what is the risk of overriding? 

Why Java Programmers Should Learn Docker and Kubernetes in 2021

Hello Java Programmers, if you are looking to learn some in-demand software tools to improve your profile then you have come to the right place. Earlier, I have shared the best tools for Java developers and today, I am extending it to all developers.  Along with Docker, if there is another tool or technology which has caught software developers' attention in recent times then it must be Kubernetes. Actually, it's often mentioned alongside Docker becuase it takes what Docker offers to the next level. If you don't know what is Docker and Kubernetes let me give you a brief overview before going deep into why every programmer should learn Kubernetes.

10 Examples of Optional in Java 8

Null is bad, it can crash your program. Even its creator called it a billion-dollar mistake hence you should always try to avoid using nulls whenever you can. For example, you should not return a null String when you can return an empty String, similarly never return null collections when you can return an empty collection. I have shared many such tips in my earlier article, 10 tips to avoid NullPointerException and my reader liked that a lot. But, I wrote that article a couple of years ago when Java 8 was not around and there was no Optional, a new way to avoid NullPointerException in Java, but, things have changed now.

Top 5 Courses to Learn Dynamic Programming for Coding Interviews in 2021 - Best of Lot

Hello guys, If you are looking for a job and giving interviews then you might have noticed that getting a Software development Job is becoming more and more difficult every day. For example, there was a time when you can get a Java developer position by just knowing Core Java concepts like String, Collections, and Multithreading, etc, but, not anymore. There were definitely some questions on Data structure and Algorithms and even on Dynamic Programming at that time as well, but the focus was always on programming language expertise like Java or Python. But, things have completely changed now, and the focus is more and more on the candidate's ability to solve coding problems.