What is the role of a printed circuit board or PCB within a piece of hardware?

During an interview for a senior hardware engineer role at Cisco, you will be asked about various components you use in your hardware designs. You are expected to provide definitions of each component, their function, and how they contribute to the overall quality of the design. When answering this type of question, you should keep your answer brief and to the point. The Cisco interviewer will ask a follow-up question if they need more information or explore the topic in more detail.