Usually veteran FBI agents, especially supervisory agents, are pretty slick when writing reports and giving testimony. Keep in mind these people are reasonably educated and this is their sandbox. I can't imagine Strzok, who is chronologically an adult, is any different.
This one is a little different though. The House Judiciary and Oversight Committee has a couple of hammerheads who have been playing close attention to this shit and who will exercise reasonable strict control over questioning. Jim Jordan is reasonably effective and he definitely does everything he can to raise his own profile so I'm sure he'll be on his game. Bob Goodlatte is second tier but he's OK.
The real killer is Trey Gowdy. Gowdy will destroy Strzok and if Strzok lies he's going to find himself eventually under arrest. He also won't be able to wiggle and worm his way out of anything.
Peter Strzok is going to have a head full of gray hair by this time next year.
All this while Ana Navarro works to fine-tune her preposterous faux-Mexican accent while simultaneously doing a high level Joy Behar impression on the fake news network.
Maxine Waters doing her Staff Edit routine while stirring the pot for her ghetto constituency as per usual.
Sarah Sanders rulez.