Q01: Why do you need sealed classes when you have the final modifier? A01: The final modifier on a class doesn’t allow anyone to extend it. What if you want …
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05: Kubernetes (i.e k8s) interview Q&As – Service Vs Ingress
Q01. What is a Service in Kubernetes? A01. A Kubernetes service is a logical abstraction for a deployed group of pods in a cluster that perform the same function. Why …
05: Microservices Architecture design patterns & considerations interview Q&As – Part 4
This extends 04: Microservices Architecture design patterns & considerations interview Q&As – Part 3. 4. Observability patterns Microservices require various cross-cutting concerns such as metrics, reporting exceptions to an exception …
05: Q19-Q24 How to create a well designed Java application?
A software application is built by coupling various classes, modules, and components. Without coupling, you can’t build a software system. But, the software applications are always subject to changes and …
05: REST Service URI conventions with Spring MVC
The high level pattern for the RESTful URI is http(s)://myserver.com:8080/app-name/{version-no}/{domain}/{rest-reource-convetion} For example: http(s)://myserver.com:8080/accounting-services/1.0/forecasting/accounts to list all the accounts. This is a plural resource returning a collections of accounts. The URI …
06: Web design patterns MVC2, MVP, MVVM & MVW
Q1. What’s wrong with Servlets? What is a JSP? What is it used for? What do you know about model 0 (aka MVC0), model 1 (aka MVC1) and model 2 …
06: Kubernetes (i.e k8s) interview Q&As – Helm charts, Argo CD & Prometheus
Q01. What is a Helm chart in Kubernetes? A01. A Helm chart is a package manager for Kubernetes. A chart is a collection of files that describe a related set …
06: Q25 – Q32 SOLID design principles interview questions & answers for Java developers
Design principles interview questions & answers for Java developers so that you can expand your OOP skills to design robust Java apps Q25. What are the SOLID design principles? A25. …
06: RESTful Web services and HATEOAS Q&A
Q1. What is HATEOAS? How does it provide state transition, scalability, and loose coupling? A1. HATEOAS (Hypermedia as the Engine of Application State) is considered the final level of REST. …
07: 20+ Pre interview refresher on tools
Experienced developers know what tools to use to get the job done. I often forget code quality tool names like Sonar, FindBugs, Crucible, etc, penetration testing tools like Skipfish, and …
07: Java 9 to 20 features interview Q&As – JShell & Collection factory methods
Q01: What is a JShell in Java? A01: JShell was introduced in Java 9, and it is a Read-Evaluate-Print-Loop (aka REPL). It provides an interactive shell for quickly prototyping, debugging, …
07: Q33 Top 5 OOP tips for Java developers
Tip #1: Tightly encapsulate your classes. A class generally contains data as well as methods, and is responsible for the integrity of its own data. The standard way to protect the …
08: Java 9 to 20 features interview Q&As – Virtual Threads
Q01: What are virtual threads in Java? A01: Virtual threads in Java are analogous to goroutines in the Go language. The virtual threads are a new type of thread that …
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In 1999, I transformed my career from a Mechanical engineer to a self-taught Java engineer within 1 year, and a Java freelancer within 2 years, and in 2016 to a self-taught Big Data freelancer.
Over the past 22+ years, I have built a high-demand career as a Java & Big Data freelancer, delivering mission-critical solutions for 13+ top-tier organisations with a proven track record that has generated over 130+ job offers to choose from 150+ job interviews.
Amazon.com profile | LinkedIn | LinkedIn Group | YouTube
Email: java-interview@hotmail.com
Over the past 22+ years, I have built a high-demand career as a Java & Big Data freelancer, delivering mission-critical solutions for 13+ top-tier organisations with a proven track record that has generated over 130+ job offers to choose from 150+ job interviews.
Amazon.com profile | LinkedIn | LinkedIn Group | YouTube
Email: java-interview@hotmail.com
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