Considering the scope of examination in chief and cross examination, what should be the difference in approaches for these two activities?

22. Considering the scope of examination in chief and cross examination,
what should be the difference in approaches for these two activities?
It is said that the art of successful examination in chief is to ask questions in such a
way that the witnesses understands the answer expected - without the question
being a leading question.
On the contrary, the art of cross examination is to ask questions in such a way that
the witness does not understands what is the purpose of the question.