No, you don't need to know that. They gave enough different examples and specific enough answer choices that the answer can be figured out without prior knowledge of lambda convention.
For #99 the reactions you need to know are the following:
Br2/FeBr3
EtOH, H+
Williamson ether synthesis
LiAlH4
SOCl2, Grignard Reaction
I believe this is all of them, try to work out a retrosynthesis given this. If you need me to draw it all out, send me a pm and I will.
