OP mentioned its a run-of-the-mill mid-size enterprise software company, which should rule out any necessity on their part to run full day interviews a-la FAANG

OP mentioned its a run-of-the-mill mid-size enterprise software company, which should rule out any necessity on their part to run full day interviews a-la FAANG. A 4h project would then be very overkill unless they're extremely confident about their technical ability