DevOps/CloudBackend
Cold Start
Also written as Cold Start Latency, Warm Start
The delay when a serverless function or container has to start from nothing because nothing was already running — the first user waits, later ones do not.
Think of it like
The first coffee of the morning takes longer because the machine has to heat up.
Junior or senior?
A practical constraint anyone who has run serverless in production has hit.
Senior sounds like
Can quantify it and describe what they traded away to reduce it.
Ask them
“How bad were your cold starts, and what did reducing them cost you?”