These are more like rules to develop RESTFul web services as opposed to being the best practices. REST is an architectural style without any contracts or specifications. So, it is imperative to apply the following rules for better REST API design. #1. Write stateless RESTFul services This means each request...
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02: 15 key considerations for low latency Java applications
Extends Writing low latency applications in Java interview Q&As. If the job description says “low latency” application, then be prepared. Even if “low latency” experience is not a requirement, all employers like candidates who can not only build systems that perform well, but also can stress test (e.g. … Read...
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02: 20+ Kubernetes (aka K8s) interview questions & answers
Q1. What is the difference between Docker & Kubernetes? A1. Docker & Kubernetes can function without each other, and also both can compliment each other. Docker enables us to run, create and manage containers on a single operating system. If you have Docker installed on a number of hosts with...
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02: 5 Java multithreading scenarios interview Questions & Answers
Java interview questions & answers on multithreading scenarios to judge your experience in building applications with concurrency in mind. Q1. Can you give some scenarios where you built concurrent systems? A1. In a concurrent system different threads run concurrently, … Read more ›...
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02: HTTP basics on headers, MIME types, & cookies for Java developers
Q1. What happens when you open up a browser and type a URL to request a Web page or RESTFul web service data? A1. HTTP is a stateless protocol on top of TCP (Transmission Control Protocol). 1) When the IP address is obtained, … Read more ›...
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02: jvisualvm to detect memory leak – a quick tutorial style Java demo
This is a companion post to 8 Java Memory Management Interview Q&A demonstrating a memory leak scenario step by step with jvisualvm, which is a free profiling tool that gets shipped with JDK. Step 1: Code that causes memory leak Here is a sample code that causes memory leak. …...
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02: Microservices Architecture design patterns & considerations interview Q&As – Part 1
This extends 10+ Key Microservices Interview Questions Answered. The architects & developers need to know these microservices design patterns & these are best practices to build robust systems. Q1. Why do we need design patterns for Microservices? A1. The goal of microservices is to increase the velocity of application releases,...
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02: Scenarios based Java OO concepts & GoF design patterns – naive Template Method pattern
Scenarios based Java OO concepts & GoF design patterns
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03: How would you go about designing an online shopping cart?
This question is a very popular white board session question for both Java architects and experienced JEE Developers. You need to draw on your experience to tackle this question as there are no right or wrong answers. These high level diagrams and summary will help you refresh your memory. Q....
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03: Identifying and fixing NonUniqueObjectException in Hibernate
NonUniqueObjectException is thrown when there is an object already associated with the session with the same id (primary key) (i.e. a duplicate). It is important to understand the concept of a “detached” object in Hibernate. This is one of the most common errors, understanding why and when this error is thrown will save you time in identifying and fixing this issue.
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03: Java GC tuning for low latency applications
This assumes that you have read the basics on Java GC at Java Garbage Collection interview Q&A to ascertain your depth of Java knowledge. This is a must know topic for those who like to work on low latency applications. Q1. In what ways does GC impact latency and throughput...
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03: Kubernetes (aka k8s) interview Q&As – objects & manifest files
Q01. What is a Kubernetes object? A01. One of the key concepts in Kubernetes is the “desired state,” which refers to the configurations of the applications that you want to deploy and run. A desired state includes things like how many instances of applications should be running, … Read more...
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03: Microservices Architecture design patterns & considerations interview Q&As – Part 2
This extends 02: Microservices Architecture design patterns & considerations interview Q&As – Part 1. 3. Decomposition Design Patterns When decomposing the Microservices, we should avoid having tight coupling between the services. This can be achieved by duplicating the data in the required/dependent services. … Read more ›...
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300+ Java Interview Questions - FAQs
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16+ Java Tech Key Areas Interview Q&As
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