The blank should be filled with "Pair Programming." Pair programming is a software development technique where two programmers collaborate on the same task. They work together at one workstation, taking turns as the "driver" and the "observer" to improve code quality.

A User Story is a concise description of a feature or functionality from the perspective of an end user. It is a common practice in Agile development to capture user requirements and expectations in a format that is easily understandable by both developers and users.

When developing a highly secure application like a banking system, non-functional requirements take precedence. These include security, compliance, performance, and reliability requirements. While functional requirements define what the system should do, non-functional requirements dictate how well it should do it, especially in terms of security and compliance.

The process of creating a data model for an information system by defining entities to be used is known as an "Entity Relationship Diagram" (ERD). An ERD helps visualize the structure of data and how entities are related.

In User Interface Design, hierarchy is essential for arranging elements to convey their order of importance. It helps users navigate and understand the content and interactions effectively.

Object-Oriented Programming (OOP) primarily focuses on modularity and reusability. It encourages organizing code into objects that can be easily reused, promoting a more modular and maintainable codebase.

To ensure both functional and non-functional requirements are addressed, it's essential to include non-functional requirements in user stories, prioritize them along with functional requirements, and use techniques like Acceptance Test Driven Development (ATDD). Delaying non-functional requirements can lead to issues.

Inaccurate requirements gathering and documentation can lead to significant challenges in a project. It can result in increased project costs, delays, scope creep, and stakeholder dissatisfaction due to misunderstandings and misaligned expectations.

The Agile Model allows changes at any point in the development process, offering flexibility to adapt to evolving requirements and market conditions. It employs iterations and welcomes changes to deliver better results.

The _____ prototyping model is known as the "Throwaway" or "Rapid" prototyping model. In this approach, disposable models are created, and each one is built based on feedback received from the previous one, enabling rapid exploration and testing of ideas.