Do examiners give consquential marks?

[soccerboi]

I'm just curious

E.g If i calculated an answer incorrectly in part a) and it is used in part b) as the value for setting up an integral, and then part c) requires an evaluation of the integral. If i get part a) wrong, it would be unfair as part b) and c) would also be wrong.

[joseph95]

Of course!
That would be extremely unfair if not