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How to design Trade Position Calculator in Java? Software Design Interview Question Solution Example

Hello guys, it's been a long since I shared object-oriented design and system design questions in this blog. It was almost 7 to 8 years when I last blogged about how to solve vending machine design problems in Java. Actually, I had ideas for lots of such design questions at that time, but because of the lengthy nature of these kinds of posts and the amount of time they take, they just sit on my list of drafts. I thought to take them out and publish then slowly improve on them instead of publishing the perfect post for the first time, and today, I am excited to share one of such problems, how to design a trade position aggregator in Java. This program is like portfolio management software that monitors your risk and exposure in real-time based on trades. 

Top 7 Google Professional Certificates on Coursera to Learn Data Analytics, Python, and IT Support in 2022 - Best of Lot

Hello guys, if you want to start your career in the lucrative field of Data Analytics, UI and UX Design, IT support, Project Management, or you want to learn in-demand skills like Python, Cloud Computing, Google Sheets, etc and looking for credible resources then you have come to the right place. Earlier, I have shared the best Data Analysis Coursera Courses and Projects, and in this article, I am going to share the best Google Certification from Coursera. These are the most reputed, most popular, and most useful Professional certificates from Coursera due to many reasons but Google's name and fame are the most important ones. No matter what, People trust anything associated with Google, and that's why these certifications are very popular among beginners and experienced developers who want to change their careers.

Top 6 Coursera Certifications for Blockchain in 2022 - Best of Lot

Hello guys, if you are not living under a rock then you know that Blockchain is quickly becoming one of the leading technology, and the demand for skilled Blockchain developers and architects are increasing every passing day. There is no surprise that Blockchain has the biggest impact on the Finance domain and almost every big investment bank has its own research division on Blockchain they are also hiring Blockchain experts to build a competitive advantage over their rivals. This means, 2022 is probably the best time to learn Blockchain and become a Blockchain developer or architect. If you already made up your mind and one of your 2022 goals is to learn Blockchain Technology and become a Blockchain developer or architect and looking for the best online courses then you have come to the right place. 

Coursera's Google IT Automation with Python Certification Review - Is it worth it in 2022?

Hello guys, if you are joining Google IT Automation with Python Professional Certification on Coursera and want to find out whether it's worth your time and money or not then you have come to the right place. Earlier, I have shared the best Cousrea Certifications and a review of other popular Google courses on IT support and in this article, we'll review Google's most popular Python certification course in Coursera. Google's IT automation with Python is a professional certificate and more than 175,000 people have already joined this course it's from Google which is a great sign but you will find out more about this course in this review. 

12 Best Coursera Professional Certificates for IT Professionals in 2022 [UPDATED]

Hello guys, If you are thinking of a career in Information Technology and Software Development in 2022 but lack a Computer Science degree or a Professional degree then you don't need to disappoint. Coursera's professional certificates can give you all the knowledge and credential to start a career in Information Technology. If you don't know, Coursera launched Professional Certificates recently which can help you get job-ready for an in-demand career field in less than a year. You can earn a career credential, apply your knowledge to hands-on projects that showcase your skills for employers and get access to career support resources.

Top 5 Machine Learning Certifications to Aim in 2022

Hello guys, if you are looking for the best Machine Learning certification to acquire in 2022 then you have come to the right place. Earlier, I have shared the best free Machine learning courses and best paid Machine Learning courses and in this article, I am going to share the best Machine learning certification to aim in 2022.  There is a lot of demand for certified Machine learning engineers, particularly AWS, Google, and Azure certified Machine learning engineers. Since Cloud computing provides enormous resources which are required for Machine learning, most of the Machine learning development is happening on the cloud, and having good knowledge and certification from top tech cloud companies like Google, Amazon, and Azure can make you a hot cake on the Job market. 

How to Read JSON String in Java using json-simple library? Example Tutorial

Hello guys, if you are wondering how to read JSON in Java using the json-simple library and looking for an example then you have come to the right place. Earlier, I have shown you how to parse JSON using Jackson and how to read JSON using the Gson library in Java, and today, I am going to share how to read JSON strings using json-simple, another popular JSON library in Java. If you don't know, JSON is a text format that is widely used as a data-interchange language because its parsing and its generation are easy for programs. It is slowly replacing XML as the most powerful data interchange format, as it is lightweight, consumes less bandwidth, and is also platform-independent.  

Top 5 Websites to Learn C# Programing and Development in 2022 - Best of Lot

Hello guys, if you want to learn C# and looking for the best resources like websites, online courses, books, and tutorials then you have come to the right place. Earlier, I have shared the best free C# courses and the best paid C# courses and in this article, I am going to share the best platforms to learn C sharp in 2022. C# is a programming language that is object-oriented and type-safe. This programming language is useful in building a number of applications that run in . NET. It is mainly used in developing desktop applications, web applications, and also web services. For you to achieve the goal of understanding C# deeply, you need to have a source of information that you can rely on at all times. 

How to send JSON via POST request using RestTemplate in Spring | PostForObject, PostForEntity, and PostLocation Example in Java

Hello guys, if you are wondering how to send a Post request with Json in Java application using Spring framework then you have come to the right place. Earlier, I have shown how to consume JSON from a RESTful API and In this tutorial, we are going to discuss how to send POST requests via RestTemplate in JSON. We will have an example project which is having POST API and then test it by sending request body along with request headers using postEntry(). POST requests can be made using the RestTemplate class's postForObject(), postForEntity(), and postForLocation() template methods. The first two techniques are fairly similar to what I covered in the GET request lesson for RestTemplate. Instead of returning the whole resource, the last method returns the location of the newly formed resource.

Top 10 CodeCademy Career Paths for Beginners in 2022 - Best of Lot

If your work is in any way related to coding or technology, you would surely know what CodeCademy is. But for those of you who don't know, it is an online platform that teaches a wide range of programming languages like JavaScript, Python, and SQL. There are also career paths based on computer science, machine learning, data science, and developer tools. In the past, I have shared the best free CodeCademy courses and in this article, I am going to share the best CodeCademy career path you can join to start your career in Machine Learning, Data Analysis, Web Development, and App development in 2022. These career paths are specially designed curricula of courses to teach you in-demand skills in proper order. 

Top 5 Azure DevOps Courses for Beginners and Experienced to Learn in 2022 - Best of Lot

Before we get to the 5 Best Courses that you can use to learn more about Azure DevOps, let me tell you what Azure DevOps is, okay? It is basically a Software as a Service(SaaS) platform that is provided by Microsoft as an end-to-end toolchain for developing and deploying software. The best thing about DevOps is that it integrates with almost all the major tools on the market which makes it great for orchestrating a DevOps toolchain. What this means is that regardless of your language, platform, or cloud, Azure DevOps will be exactly what you need.

Top 5 Courses to Learn WebSocket for Beginners in 2022 - Best of Lot

The WebSocket API is a communication protocol used in communications between client and server. What makes WebSocket different from other communication protocols like HTTP is that it is bidirectional.  It is also a stateful protocol and connections will be kept alive until it is terminated by either the client or the server. WebSocket has many uses in real-time web applications, gaming applications, and chat applications. WebSocket can be used in real-time web applications to show the data client-side that is continually being sent from the back-end servers. 

Spring Boot + MySQL Database example (CRUD) in Java [Tutorial]

Hello guys, if you are a Java developer and wondering how to connect to MySQL database from Spring Boot Java application then you have come to the right place. In this series of Spring Boot tutorials, earlier, I have shared how to use Redis with Spring Boot, a NoSQL database and in this article, I Am going to share how to connect to a relational database like MySQL with Spring Boot. I have also shared tutorials like Spring Boot + MyBatis, Spring Boot + React.js, and Spring Boot +Angular app for full-stack Java developers. If you haven't checked them then you can also check them out along the way. 

Top 5 Courses to learn Spring Batch for Java developers in 2022 - Best of Lot

Good day, folks! Many of my readers asked about a similar list of free courses to study Spring Framework like Core Spring, Spring MVC, Spring Security, and Spring Boot after I released my list of Top 5 courses to learn Spring and Hibernate. To respond to that request, I already shared the 5 best Spring Boot courses, and today I'm going to give free Spring batch courses. I've developed a list of some of the top online free courses for learning Spring batch from the ground up, at your own speed.

Top 5 Courses to Learn Microsoft Access for Beginners in 2022 - Best of Lot

Before getting to the best courses that you can use to learn more about Microsoft Access is. MS Access is basically a database management system that is a part of the broader Microsoft Office suite of productivity applications. MS Access was actually Windows' first mass-market database program and was released in November 1992. The latest version of MS Access requires 2 GB RAM to work properly. MS Access is most often used to develop application software and is mainly used by data architects, software developers, and power users. It can also be used to manage accounts and bills, store data in the form of tables, edit or customize them later, make different kinds of websites, and compare data or find a relationship between the existing data.

Top 5 Microsoft Azure DevOps Solutions Courses and Practice Tests for AZ-400 Exam in 2022 - Best of Lot

Before we get to the courses and practice tests that you can use to clear the AZ-400 Microsoft Azure DevOps certification exam, you need to know what exactly this AZ-400 exam is, right? Well, it is basically an exam that measures your ability to accomplish technical tasks like developing an instrumentation strategy, developing a site reliability engineering strategy, managing source control, developing a security and compliance plan, facilitating communication and collaboration, defining continuous integration, implementing continuous delivery and release management strategy.

Top 5 Courses to Learn Cryptography In Depth in 2022 - Best of Lot

In the most basic of terms, cryptography is the technique of securing information by using codes so that only the authorized person is able to access the information. The word cryptography is made up of "crypt", which means 'hidden', and "graphy". which means 'writing.' There are a lot of different techniques in cryptography that make use of mathematical concepts and a set of rule-based calculations known as algorithms. These are used to convert messages in different ways so that it remains safe and secure. There are different algorithms for cryptographic key generation, digital signature, verification to protect data privacy, web browsing on the internet, and protect confidential transactions.

Spring Boot + Hibernate Example for Java Developrs

Hello guys, if you want to learn how to use Spring Boot and Hibernate together in a Java application and look for examples and tutorials then you have come to the right place. In the past, I have shared how to use Spring Boot with MyBatis and Spring Boot + Redix example and In this article on Spring Boot, we will discuss how to integrate Spring Boot with Hibernate. We will build a simple Spring Boot application and use Hibernate to store the data. So first, let's look at what is hibernate in Java? Hibernate framework provides an abstraction layer which means programmers need not worry about implementation. Hibernate will implement different modules for developers internally like writing queries to perform CURD operations on the database and establishing connections to different kinds of databases. This is a Java-based solution for object-relational mapping.

Spring Boot + Redis Example in Java

Hello guys, if you are wondering how to use Redis with Spring Boot in Java then you have come to the right place. Earlier, I have shared the Spring Boot + React example, Spring Boot + Angular example, and Spring Boot + MyBatis examples In this tutorial, we will review the basics of how to use Redis with Spring Boot. We will build an application that demonstrates how to perform CRUD operations Redis through a web interface. So before going into in detailed project example, let's move with the what is spring Redis. As Java developers, we need to talk about the data layer, as we can't develop an insightful application without the use of CRUD operations. 

Spring Boot + Kafka Example (Single and Multiple Consumer) in Java

Hello guys, if you want to use Apache Kafka with Spring Framework or Spring Boot and looking for an example then you have come to the right place. In the past, I have shared the best Spring Boot courses as well as best Apache Kafka courses for Java developers, and in this article, I am going to share how to use Apache Kafka with Spring Boot. You will learn both, to publish and consume messages from Apache Kafka topics. By the way, if you don't know, Apache Kafka is an open-source stream-processing software platform developed by LinkedIn and later they donated to apache software foundation. This is developed using Java and Scala. Real-time data processing can be done using Apache Kafka. In this tutorial, we will discuss the spring boot and Kafka example with single/multiple consumers. So let's have a look into this. 

Top 6 Product Design Courses for Beginners in 2022 - Best of Lot

Product design or UX design can be a great skill, and mastering it will give you a huge boost in the job market. The rise in popularity of SaaS ( Software as a service) products has led to a huge demand for product designers. Product Design involves conceptualizing, creating, and delivering products aimed at solving users' problems or addressing specific needs prevalent in the market. A good product designer should have a great understanding of the end-user, but it is also not easy to get the design right, and that's why knowing the design process is quite important. You can avoid common mistakes and use proven design best practices from the first iteration to make your product more accessible and look good, and that's where these best product design courses will help you.

5 Best Courses for AWS Certified Big Data and Data Analytics Specialty Certification Exam

Before we get to the best courses that can teach you more about the AWS Certified Big Data Specialty, you need to know exactly what it is. It is basically an industry-recognized credential that will validate your technical skills and expertise and help you grow your career. The AWS Certified Big Data Specialty is meant for people who perform complex Big Data analyses and have at least two years of experience using AWS technology. As of April 2020, the AWS Certified Big Data Specialty has been converted into the AWS Certified Data Analytics Specialty. 

How Long Does It Take To Learn Web Development in 2022?

Hello guys, if you are wondering how to learn web development and how much time it will take to learn web development and become a web developer then you have come to the right place. Earlier, I have shared the best web development courses and best courses to learn essential web development skills like HTML, CSS, JavaScript, and frameworks like React.js and Node.js and in this article, I will tell you exactly how much time it's going to take learn web development, like how many weeks or months? No doubt, any company established nowadays doesn’t have a website because you can’t reach your audience and build a relationship or offer a service without a website.

Top 6 Courses to Learn Freelancing in 2022 - Best of Lot

Before we get to the main stuff of this article, I can hear you wondering to yourself, "What exactly is freelancing?" Don't worry; I have got you covered. If you are a freelancer, it basically means that you are working as an independent company and not employed by someone else. Freelancers are also often referred to as independent contractors. This basically means that they are self-employed. Most of the time, freelancers are hired by other companies part-time or short-term. The most important thing to note here is that freelancers will not receive the same level of compensation as full-time employees. They will also not have a high commitment to any particular company.

How Autowiring of Beans works in Spring? @Autowired Annotation Example

Hello guys, if you are wondering how auto-wiring works in the Spring framework and how the Spring framework magically finds dependency and relevant beans to inject into your program then you have come to the right place. In the past, I have shared how Spring MVC works and in this article, I am going to explain how auto-wiring works in spring and how you can use @Autowired annotation for auto-wiring dependencies in your code. In Spring, you need to know the most important things before starting your coding. From spring 2.5 onwards, the annotations-driven dependency injection was introduced and it is used to inject collaborating beans into the beans. So in this tutorial, we are going to explain how does auto wiring work in spring.

How to check if a given linked list is a palindrome in Java? Example [Solved]

Hello guys, if you are wondering how to check if a given linked list is a palindrome in Java then you have come to the right place. In the past, I have shared how to check if a given String is palindrome or a given number is a palindrome, and in this article, I will teach you how to check if a linked list is a palindrome. But before that, let's revise what is a palindrome? A palindrome is a phrase, word or number, or other sequence of characters that reads the same backward ad forward. Meaning that It gives you the same thing when read forward or backward. For example, Mary, Army, Madam, racecar, 1-2-3-2-1, noon, level, Hannah, civic, etc.

Top 5 Java EE 7 Application Developer Exam Courses and Practice Tests

Before we get to the best courses that you can use to clear the Java EE 7 Application Developer Exam, let me tell you what this exam really is. The Oracle Java EE 7 Application Developer Certification is an exam that validates your programming ability to develop and deploy applications using Java Platform, Enterprise Edition 7. This Java Certification exam is meant for intermediate and advanced-level front-end and back-end application developers, architects, and software engineers who possess the necessary skills. You should be an expert in utilizing the Java EE 7 technology to create web-based user interfaces using JavaScript, JSPs, JSFs, and Servlets.

How to Reverse a Stack in Java? Example Tutorial

Hello guys, if you are wondering how to reveres a stack in Java then don't go anywhere. In this article, I will show you step by step how to reverse a given stack in Java. There are two ways to reverse a stack, you can use iteration or recursion. The most common way of reversing a stack is to use an auxiliary stack. First, we will pop all the elements from the stack and push them into the auxiliary stack. Once all the elements are pushed into the auxiliary stack, then it contains the elements in the reverse order and we simply print them. But, here, we will not use the auxiliary stack. We will use a recursion method to reverse a stack where recursion means calling the function itself again and again. 

What is Phaser in Java? When and How to use Phaser? Example Tutorial

Hello friends! We are back again and today we will discuss something very special. We all know that synchronization is very important in life, well, it is also very important in Java too. So buckle up your seatbelt because today we are gonna learn Phasers in Java which are really important for thread synchronization. In the past, I have shared the best Concurrency courses and books and also wrote tutorials about popular Java concurrency utility classes like CyclicBarrier, CountDownLatch, BlockingQueue, ForkJoinPool, and recently CompletableFuture in this article, you will learn about Phaser, another useful concurrency utility for Java programmers. 

So what’s the wait? Let’s start!