Suppose we have a program which runs on our machine X with all the dependencies, configurations etc. Now imagine we transfer the program/code via github/to a friends machine Y with the same set of configs but the same program fails to run/work on machine Y. So what can go wrong…

Following my article about system design basics, I have decided to follow up with a brief case study about different systems. To start off, we have a code execution system similar to one we have in leetcode, hackerrank etc. Jumping right into it:- Problem statement: — During a coding competition…

A system is a set of components clubbed together to fulfill different kind of users and their requirements. Design is the process of selecting services/components etc. Designing a system is generally based upon he user base, type of product etc. For example large scale systems like Facebook, Viber etc have…

Over the years, spring framework has developed a lot. From, providing support for simple API’s to develop large scale microservices, Spring provides a huge scale of capabilities. Moreover, spring applications can easily be dockerized and scaled up to large extents. Now, suppose we work on various environments/parts having requirements which…

Microservices are basically small casts of a bigger mold and explaining everything in detail is an article here. So as per the previous article, you might have noticed that the URLs of microservices are hardcoded. Now, this is an extremely bad practice because of the following:- · Url’s might change…

Microservices in general is basically breaking down a software into various forms. It’s mainly distributing a monolith application in various small applications to decrease the complexity of the application. The small part forms a microservice and various microservices work together to run an application. …

In a project or an API, testing the request fields for for null values or for custom checks is quiet common. Generally, to check for a null value or for a particular password pattern or for a URL validation, we need to perform manual checks on the form data fields…

Push Notifications are features that allow a website to show instant messages to the user on a desktop. …

A full-stack application dealing with public interactions or creating user profiles usually runs into the problem of storing images or profile pictures of users to the database. Of course, you can break the picture into bytes or bits, etc, and store the same but this is a horrible practice and…