Which two formats are lightweight and commonly used for data interchange that are easily readable by computing systems?

The correct answer highlights JSON as one of the formats commonly used for lightweight data interchange that is easily readable by computing systems. JSON, or JavaScript Object Notation, is widely adopted due to its readability for both humans and machines, making it a preferred choice in web applications for data transmission between a server and a client. Its simplicity and structured format contribute to efficient parsing in various programming environments.

In contrast, while XML is another data interchange format, it is generally considered heavier and more verbose than JSON, which could make it less efficient for certain applications needing lightweight communication. REST is not a data format; rather, it stands for Representational State Transfer, an architectural style for designing networked applications. Python, while a programming language capable of handling data in various formats, does not serve as a data interchange format itself. Thus, JSON's efficiency and ease of use in data interchange make it the key choice in this scenario.