Object-oriented programming languages (OOP) like Python,.NET, and Java, and functional programming languages like Clojure, Haskell, Ruby On Rails, and SQL, are the two categories. It’s crucial to understand both because various organizations utilize different backend languages.
- APIs - APIs are the conduits through which data is exchanged. They serve as a link between the back end and the databases, allowing developers to retrieve user information. The majority of back-end developers write APIs using Python and NodeJS.
- Data Structures - Data structures are an important part of organizing, accessing, and altering data, and back-end developers should be well-versed in them.
- Servers - The backbone of every back-end development is the server. They work 24 hours a day, 7 days a week to assist in the delivery of critical services such as processing requests for web-based files and transferring those files to the client.
- Algorithms - Algorithms are necessary for any form of problem-solving in software development. The majority of back-end engineer interview questions will put your algorithmic abilities to the test.