Final answer:
Database conversion is tested during the Testing phase of an SDLC project, following the Design phase where prototypes may be created and initially evaluated.
Step-by-step explanation:
During a software development life cycle (SDLC) project, database conversion is typically tested during the Testing phase. This phase comes after Planning, Analysis, and Design phases and is critical for ensuring that all aspects of the system, including database conversion, work correctly. The design process involves multiple steps such as prototyping, testing, and refinement, and it is during the testing phase where the database conversion is properly evaluated.
Testing may reveal weaknesses or areas for improvement, and it can lead to refinement of the design. If the testing indicates significant issues, the process may loop back to earlier stages such as Design for further adjustment before the system reaches the Implementation phase where the final product is manufactured or deployed.