In a traditional software development lifecycle model, which phase typically involves coding?

In a traditional software development lifecycle model, the phase that typically involves coding is the one focused specifically on software and data systems coding. This phase is where developers write the actual code that implements the system's functionality based on the outlined requirements and design specifications. The coding phase is critical because it translates the high-level design into a working system through programming languages and development tools.

During this stage, developers create the software components that will eventually be integrated and tested in later phases. This includes writing code for user interfaces, business logic, and database interactions. The focus is on translating designs and requirements into executable software, making it the essential phase dedicated explicitly to coding.

In contrast, the other phases mentioned—Acceptance Testing, Systems Design, and Requirements Definition—do not involve coding directly. Acceptance Testing evaluates the completed software against requirements after coding is finished. Systems Design involves creating the architecture and design specifications prior to any coding, focusing on how the software will meet the specified requirements. Requirements Definition gathers and specifies the needs and expectations of stakeholders before any coding occurs. Therefore, the ultimate phase where coding takes place is the one dedicated to software and data systems coding.