sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What is the best way to learn and practice C programming?
 sentence 2: How do I practice C programming? sentence 1: I don't understand shear force and bending moment diagrams what should I do?
 sentence 2: What is the difference between the shear force diagram and the bending moment diagram?
not same meaning
same meaning
not same meaning