(a) Excellent: Really helpful (b) Good: Moderately helpful (c) Fair: Mildly helpful (d) Poor: Not that helpful
"In general, people emphasize how much they know and not how fast they're learning. But how fast you learn is a lot more important than how much you know to begin with.
You shouldn't be afraid to try new things even if you're completely clueless about the area you're going into. No need to be afraid about that. As long as you learn fast, you'll catch up and you'll be fine."