What is front-end , back end design in VLSI ?

1)What is the meaning of front end & back end design in VLSI ?....Which has more demand in industry ?

2)What are the steps in VLSI product development ? Which is the most crucial step ?

3)What is the job of verification engineer in VLSI industry ?

4)Which step needs coding skills & which does not?

5)What is expected from a fresher in VLSI industry?