Final answer:
In agile and DevOps, the coding and implementation phase is part of the developer's responsibility.
Step-by-step explanation:
In agile and DevOps, the waterfall phase that is part of the developer's responsibility is the coding and implementation phase. This is where the developers write the code and implement the features of the software based on the requirements and specifications.
During this phase, the developers follow the principles of agile and DevOps methodologies, such as iterative development, continuous integration, and continuous delivery. They collaborate with other team members, such as product owners and testers, to ensure the successful implementation of the software.
For example, in an agile development process, the developers can use practices like pair programming or mob programming to work together on writing code and solving problems effectively.