Is Serverless Cheaper?
A team wants to move a service to functions to reduce cost. What do you check first?
Practical scenario
An API at a steady 200 req/s with a 300ms p50 is proposed for migration to functions "to stop paying for idle". The same platform also runs a nightly export job on a permanently provisioned instance that is idle 23 hours a day.
What it tests
Answer it out loud first. The guide below stays closed until you ask for it, on purpose.
- Whether the candidate evaluates cost against the actual traffic profile
- Whether they know the non-cost constraints that decide the fit
- Whether they can identify workloads where functions are clearly right
Reading a strong answer is not the same as producing one. Commit to what you would say, then compare.