Can you explain your work hard/smart answer above?

There should be a combination of working hard and smart to get the work done. Suppose I am a student and tomorrow is my exam and I haven’t studied anything. Then in that situation we need to work smartly and focus on a few important topics and easy to cover chapters which could be covered in the remaining on time. And we need to work hard for that period of time so that we can maximise our chances to pass. Cover as much as we can and keep in mind about the time constraints.