This is a general question arising in everyone's mind.Conceptual questions are common in almost all public exams. Approaching conceptual queation is very challenging.Thsese questions are meant for measuring and testing how good at all are you in that specific concept.
The answer should be specific , try to find what principle is behind in the problem and try to state it and will be good if we state the final equations resulting from the principle.
When ever we learn a concept try to link with daily life and it will help us in exam to crack the question easily.