[cesarbs]

You're not alone.

To make it worse I tend to start stuttering when asked things on the spot, even though I know the answers or could easily look up whatever info was asked for. I'm painfully aware this makes me look like I don't know what I'm doing. People generally don't have the patience to let me gather my thoughts and give a coherent explanation/answer.

[thegayngler]

Exactly. I think that is actually their own failure and not mine. About 50% of the time thinking fast just gets you a rushed answer which is likely not to be the correct answer. My manager literally said he can't trust me with on the spot questions. I'm like well duh. You shouldn't trust the off the cuff for certain types of questions. I try to actively limit the amount of company specific information that goes into semi/long-term memory.