Protected: Advanced Java Interview Questions – 20 MCQs with Answers and Explanations
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Codex, MCP, and Spring AI: Building Tool-Enabled Java Applications with the Latest OpenAI Models
Codex becomes far more useful when it can move beyond code completion and safely work with the systems that already run a business. The practical pattern is simple: expose a…
Choosing the Right Codex Model in VS Code
A practical guide to GPT-5.6 Luna, Terra, Sol, GPT-5.5, and GPT-6 Astra in the Codex VS Code plugin, including when to use each model, how the reasoning bar affects behavior,…
Kubernetes Readiness Probes in Spring Boot Microservices: Designing a Production-Ready Health Check
How to Calculate Application Readiness Using Database, Redis, Solace, Certificates and Startup State In a Kubernetes or OpenShift environment, a microservice being running does not necessarily mean it is ready…
How Does UPI Prevent Double-Spending at 15 Billion Transactions a Month?
How do you safely move money at massive scale without charging the customer twice? Imagine this simple scenario: You have ₹500 in your account and try to pay a merchant…
Top 10 Java, Microservices & Kubernetes Interview Questions Every Senior Tech Lead Should Know
Most interview questions test your memory. Great interview questions test your engineering judgment. Over the years, I've interviewed hundreds of Java developers ranging from fresh graduates to Solution Architects. One…
Part 9 – Why Spring Boot Applications Get OOMKilled in Kubernetes
Understanding JVM Memory, CPU, Requests, Limits, and Production Sizing "If you're still sizing your Java application based only on -Xmx, you're sizing it for a virtual machine, not for Kubernetes."…
Part 8 – Mastering Configuration in Kubernetes
Externalizing Configuration with ConfigMaps, Secrets, Spring Profiles, and Feature Flags "The best deployment is the one where the application binary never changes. Only its configuration does." Wednesday Morning, 7:45 AM…
Part 7 – Building Self-Healing Spring Boot Applications with Kubernetes Health Probes
Why "Running" Doesn't Mean Your Application Is Ready "A container can be running, the JVM can be alive, and yet your application may still be incapable of serving a single…
Part 6 – Graceful Shutdown & Zero-Downtime Deployments
Why Every Spring Boot Developer Must Understand SIGTERM Before Running on Kubernetes "Deploying a new version is easy. Deploying it without your customers noticing—that's engineering." Friday Evening, 6:00 PM It's…