Notes about HackerRank. What is HackerRank? HackerRank is a learning site where you can learn programming by solving problems. While most of these sites specialize in either web development or competitive programming, HackerRank covers bot…

How the architecture has changed over the trend of products Introduction There are several architectural patterns that we can choose in web development. The server structure is categorized by monolithic or microservices. Tthe database is s…