Pick a concept you know deeply and use a real-world analogy. Explain it like you would to a smart friend who works in a different field.
Look for the ability to use analogies, avoid jargon, and build understanding progressively. The specific concept matters less than the communication skill. Strong candidates check for understanding and adjust their explanation. This skill is critical for working with product managers, designers, and stakeholders.
Communication is one of the most underrated engineering skills. If they cannot explain their work simply, they will struggle in cross-functional teams. Watch for patience and clarity.