From Physical Servers to Kubernetes: The Complete Evolution of Application Networking (Explained with real example – TravelCity)
If you’ve ever tried to jump straight into Docker or Kubernetes without understanding why they exist, you’ve probably felt lost. Terms like Pods, Services, Ingress Controllers, and Load Balancers start to feel like buzzwords instead of…
Retrieval-Augmented Generation (RAG): Architecture, Pipeline, and Enterprise Implementation
Introduction Large Language Models (LLMs) such as GPT, Claude, Gemini, and Llama have transformed how organizations build AI-powered applications. These models excel at understanding language, reasoning, and generating human-like responses. However, they…
Building Enterprise AI Applications with RAG and LangChain
Large Language Models (LLMs) such as GPT, Claude, and Gemini are excellent at understanding language, reasoning, and generating human-like responses. However, they have one major limitation—they do not know your organization’s private knowledge…
From ChatGPT to AI Agents to MCP: Understanding the Evolution of Enterprise AI
Introduction Over the past couple of years, we’ve all become familiar with AI tools like ChatGPT, Claude, Gemini, and Microsoft Copilot. They can answer questions, summarize documents, write emails, generate presentations, and even help us write…
Service Discovery in Microservices: From Eureka to Kubernetes
In a microservices architecture, applications are split into multiple independent services. For example, an e-commerce application may consist of the following services: These services frequently communicate with each other. For example: Whenever the…
How Service Discovery Works in Kubernetes ?
In Kubernetes, service discovery is the mechanism that allows pods to find and communicate with other applications without needing to know their IP addresses. The Problem Pods are ephemeral: If applications connected directly to pod IPs, communication…
Which design patterns are most heavily used in Spring?
A strong answer is: How does Spring use design patterns Internally? 1. Singleton Pattern — How Spring Actually Uses It What developers see @Servicepublic class UserService {} @Autowiredprivate UserService userService; Every injection gets the same…
How Hashmap stores values ? What is hash collision ? How store values in case of hash collision in Java ?
1. Internal Structure A HashMap internally maintains an array of buckets. Suppose capacity = 16. 2. Storing a Value Step 1: Calculate hash Java actually does: Let’s assume: Binary: Step 2: Find Bucket Index HashMap uses: For capacity 16: Binary:…
Hardware vs Software
Hardware and Software are the two main components of a computer system. Hardware Software Physical parts of a computer that you can touch. Programs and instructions that tell the hardware what to do. Tangible (has physical form). Intangible (cannot be…
What is D-DOS attack ?
A DDoS attack stands for Distributed Denial of Service attack. It is a cyberattack where an attacker uses many computers, servers, or internet-connected devices (often a “botnet” of compromised devices) to overwhelm a target system with…