Which of the following programming languages is known for using Rapid Application Development?

Delphi is recognized for its strong emphasis on Rapid Application Development (RAD). This programming language is specifically designed to facilitate rapid prototyping and application development through its visual programming environment and straightforward design capabilities. Delphi allows developers to quickly build user interfaces with its visual component library, enabling faster iterations and adjustments to applications.

The focus on RAD is a core aspect of Delphi's appeal, as it promotes speed and efficiency in the development process. Hence, its tools and features are fine-tuned for developers seeking to create applications swiftly while still maintaining a high level of functionality and user experience.

In contrast, while languages like Python, C++, and Java can also be used for application development, they do not inherently focus on RAD in the same manner as Delphi. Python is known for its simplicity and versatility, C++ offers powerful performance capabilities, and Java is favored for platform independence and enterprise-level applications, but none are as explicitly aligned with RAD principles as Delphi.