Junior Web​/Software Developer Common Questions

Common Questions for Junior Web/Software Developer

This section provides answers to common questions related to web and software development.

• What is Agile development? A software development methodology that delivers functionality in rapid iterations, measured in weeks, requiring frequent communication, development, testing, and delivery.
• What is Ruby on Rails? An open source web application framework that uses convention to quickly create MVC, written on top of the Ruby programming language.
• What are the four principles of object-oriented programming? Abstraction, Encapsulation, Inheritance, Polymorphism
• What is abstraction? A process of hiding the implementation details and showing only functionality to the user. Abstraction lets you focus on what the object does instead of how it does it.
• What is encapsulation? Surrounding something, not just to keep the contents together, but also to protect those contents. Restricts access to the inner workings of a class or any objects based on that class; this is referred to as information hiding or data hiding.
• What is inheritance? A mechanism in which one object acquires all the properties and behaviour of another object of another class. It is used for Code Resusability and Method Overriding. A child class inherits/reuses methods from its parent class.
• What is polymorphism? When two different objects respond to the exact same message in different ways. Two different classes might have the same named method that is implemented in a manner specific to that class.
• What is BEM CSS? A methodology for structuring CSS code that uses Block, Element, Modifiers.
• What is an API? An application programming interface (API) allows application developers to bypass traditional web pages and interact directly with the underlying service through function calls. Web APIs respond with raw data not meant for rendering a user experience.
• What is postgresql? An open source object-relational database management system that uses and extends the SQL language.
• What is elasticsearch? An open-source, broadly-distributable, readily-scalable, enterprise-grade search engine. Accessible through an extensive and elaborate API, Elasticsearch can power extremely fast searches that support your data discovery applications.
• What is redis? An in-memory data structure store, used as a database, cache, and message broker. Supports caching, where some data is stored in a cache for faster retrieval.