Importance of S.O.L.I.D principles Introduction As developers, we have always dealt with legacy codebases. Most of the legacy codebases have tightly coupled classes, redundant code, and less test coverage. This gives a developer a hard time to comprehend the functionality of a codebase when giving a quick glance at the code. …

Internal workings of the Javascript engine, Event loop, Web APIs, Event queues, and Callbacks. Introduction Have you ever imagined what would have happened if there was no Javascript? In the absence of Javascript, you wouldn’t be able to stream movies on Netflix, shop on Amazon or watch videos on Youtube. …

Common mistakes developers make and how to avoid them — Coding Interviews Coding interviews are challenging and need a lot of preparation. Big Tech companies expect candidates to solve two problems within 45 minutes. Many times, candidates solve the problem and implement the solution only to find themselves rejected. In most of the cases, the recruiter tells them to improve problem solving…

Working, advantages & disadvantages of the sidecar container — Introduction In the past decade, tech companies have widely adopted microservices architecture. The adoption has dramatically improved the availability and reliability of the services. Containerization has further speeded up the development process and reduced the operational burden on developers. It’s a challenging task to build distributed systems. Developers have identified a…

Internals of a Web crawler Introduction In the past two decades, the internet has witnessed phenomenal growth. The amount of data on the internet has been growing exponentially. The internet has bought a tremendous revolution in our lives. Search engines have primarily played a significant role in information discovery. …

Internal workings of the Domain Name System Introduction Have you wondered what happens behind the scenes when you type any website url in the browser ? Whenever we type a website address such as www.google.com, the browser loads us a page within few milli seconds. The browser executes multiple things like…

Tips and strategies for cracking LLD interview — Introduction Low-level Design rounds have become an integral part of the Tech hiring process. Few companies call it the Pair Programming round or Machine Coding round. Most of the companies ask open-ended questions like “Design a Vending Machine” in this round. I have seen many candidates getting confused between High-level Design…

Key differences between the programming models — Introduction Single processor systems dominated during the early days of computing. The synchronous programming model was adopted in many early programming languages. With the advancements in hardware, there was a need to develop better programming models. A robust model that would fully utilize all the resources would be the most suitable…

Anatomy of Two-phase commit — Introduction In today’s world, data is growing at an enormous rate. Enterprises have built innovative solutions to handle a humongous amount of data. It’s not uncommon to see data distributed across many machines or databases. This technique is known as ‘Sharding’, helps in building scalable & reliable systems. Tech companies also…