Infosys Backend Developer Interview Questions, Process, and Tips

I chose Flask over Django and FastAPI due to its simplicity, flexibility, and ease of use for smaller projects.

• Flask is lightweight and minimalistic, making it easier to set up and use for smaller projects.

• Flask allows for more flexibility in terms of project structure and customization compared to Django.

• Flask is well-suited for rapid prototyping and smaller applications where simplicity is key.

• Django, on the other ha...read more

Flask request and response block code snippet

• Use Flask's request object to access incoming request data

• Use Flask's jsonify function to create a JSON response

• Handle different HTTP methods like GET, POST, etc. in the route function

ORM stands for Object-Relational Mapping, a programming technique for converting data between incompatible type systems in object-oriented programming languages.

• ORM is used to map objects from an application to tables in a relational database.

• It simplifies data manipulation by allowing developers to work with objects instead of SQL queries.

• Popular ORM tools include Hibernate for Java, Entity Framework for .NET, and Seq

Use ORM code to select item from a table in database.

• Use ORM query methods like find(), findOne(), or where() to select items from a table.

• Specify the table name and any conditions for the selection.

• Example: User.find({ where: { id: 1 } }) will select a user with id 1 from the User table.

WebSocket is a protocol for full-duplex communication channels over a single TCP connection, enabling real-time data exchange.

• WebSocket allows persistent connections, reducing latency compared to traditional HTTP requests.

• It is commonly used in applications like chat apps, online gaming, and live notifications.

• WebSocket connections start with an HTTP handshake, then upgrade to a WebSocket connection.

• Example: A stock tr...read more