This is asinine.

How often has the size of a primitive come up in day to day programming in say... The last month?

When has one of your developers ever had to use this information to the point where it had to be memorized?

Especially when it's literally a 1 second search away.

This isn't about knowledge. If you can't compute that a 32-bit integer is 4 bytes, or have the knowledge that an int in c# is 32 bits and a long is 64-bits, then no, you don't actually know enough to be on a team. And yes, it does come up and yes, it does matter.