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When building or consuming RESTful APIs, understanding HTTP response status codes is essential. These codes tell the client whether a request was successful, failed, or needs additional action. In this guide, we break down the most commonly used status codes in REST APIs with simple explanations and real-world usage examples. ⭐ What Are HTTP Status Codes? HTTP status codes are standardized responses sent by a server when processing an API request. They are grouped into five categories: 1xx – Informational 2xx – Successful 3xx – Redirection 4xx – Client Errors 5xx – Server Errors For REST APIs, the 2xx , 4xx , and 5xx groups are most important. ✅ 1. Success Status Codes (2xx) These indicate that the request was successfully received and processed. 200 OK The most common success response. Used when a request is successful and returns data. Example: Returning a list of products from /api/products . 201 Created Used when a new resource is created suc...

  What is Docker? From Shipping Containers to Software Containers Docker is a revolutionary technology that has completely changed the way software is developed, shipped, and deployed. If you want to become a DevOps engineer or stay relevant in modern software engineering, learning Docker is essential. But what exactly is Docker, and why is it called “Docker”? To understand that, we need to take a quick journey back into the history of the shipping industry. Before the Shipping Container Revolution The Chaos Before the 1950s Before the 1950s, loading and unloading cargo from ships was extremely slow, difficult, and expensive. Ships carried goods in: Wooden boxes Barrels Sacks Nets and odd-shaped bags Everything had different shapes and sizes, so: Hundreds of workers were needed to load/unload The cargo often got damaged Ships wasted a lot of space The process was slow and inefficient Major Problems Slow loading/unloading Expensive due...