For my most recent job (Staff/Principal SWE) I interviewed at four companies, each with four rounds of interviews (usual variations on 30m recruiter screen, 45m-60m tech discussion or coding exercise, 60m-90m tech deep dive, 30m-45m final wrap up with hiring manager). All over the course of about 3 weeks. It was about 16 hours in total.
No chance you can do that on "sick days", fake doctor/dentist appointments, or other such scheming. Taking many half days of personal leave just isn't workable either. You're not in full control of the scheduling to make different companies interview you one after each other on the same day, or take the same time between rounds. Some could have been scheduled in lunch breaks but not all of it.
Most people I've worked with would just schedule some "focus time" and were either WFH or headed off to a quiet part of the office or a nearby co-working space. Personal laptops are easier to use offsite obviously.
> Taking many half days of personal leave just isn't workable either.
Why it isn't? A genuine question, I presume this is more typical US culture or dare I say workaholism and various self-pressures to maintain some public office image?
I recently took quite a few half days off to manage workers doing bigger reconstruction in our apartment. Sometimes full day. Then smashed a week of vacation in Sardinia in between. Everybody understood whats happening, nobody cared since many went through similar exercise before.
Your time is your time, if you actually let it happen. Or you can spend your life living with servile attitude, nobody will thank you though.
I usually refuse such Silicon Valey interview style, unless I am desperate for a new position.
For the ones I usually take, a few hours out from overtime budget is enough, or WFH days.
With 30 days holidays + overtime budget, taking a day off for an site interview, is manageable.