Treatment of diseases requires both theory and practice. It is a combination of art and science.  The "ultimate challenges" mentioned earlier is a manifestation of this combination. In fact, whenever we attend to a patient, it is a test for us. Doctors in clinical practice must accept “tests” continuously so that they could improve on existing skill and elevate it to a higher standard. In recent years, we have sat for numerous "tests" in the treatment of cancer patients and attended face-to-face interviews, too. We list down some of the tests here: