I'm an in-house recruiter at a Series D, not at ServiceNow, but I've placed a dozen people there over the years and coached even more through their process. I know roughly what their recruiters are doing in that first call, and the questions candidates come to me panicked about are totally predictable.
Here's what happens on a ServiceNow recruiter phone screen, from the other side:
The call is about 30 minutes, maybe 45. It is not technical. It is a screening call. The recruiter is deciding if you're worth the engineering team's time, not whether you can write a BFS algorithm.
What they will ask: Walk me through your background, with emphasis on recent role. Why are you interested in ServiceNow? (Hint: "because you reached out to me on LinkedIn" is not the answer they want, even if it's true. Have something.) What is your current situation? (Employed, notice period, etc.) Salary expectations / target compensation range. Location and work mode preferences. ServiceNow has been calling people back to office for certain roles, so this is a real screen. Sometimes: what level/title are you targeting, and what do you currently hold?
Comp question: They will ask. Give a range. I always coach candidates to say something like "I'm targeting $X to $Y in base, with the full package dependent on equity and bonus structure." Don't lowball yourself to seem agreeable. Look up levels.fyi before this call.
The part candidates underestimate: The enthusiasm question. "Why ServiceNow?" Not prepared for this is a real failure mode. They're a $100B+ market cap company with a specific story: ITSM to workflow automation to AI-augmented enterprise. Know that story. Know one thing they've shipped recently. It takes 10 minutes to look this up.
What happens after: If the recruiter moves you forward, expect the OA or a technical phone screen depending on role. Timeline from phone screen to decision I've seen range from 2 weeks to 7 weeks. ServiceNow is not the fastest process.