Looks simple until the follow-ups: which layer do you balance at, how do you avoid sending traffic to a dead server, and how is the load balancer itself not a single point of failure? Interviewers want the algorithm, the health-check loop, and the high-availability story.
Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.
Looks simple until the follow-ups: which layer do you balance at, how do you avoid sending traffic to a dead server, and how is the load balancer itself not a single point of failure? Interviewers want the algorithm, the health-check loop, and the high-availability story.
No lesson covers this question directly yet. These teach the surrounding topic from the beginning.
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