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Which scenario is the textbook GOOD use of EC2 Spot instances?
AStateless, fault-tolerant batch processing (e.g. EMR data processing, CI/CD runners, ML training that can resume from checkpoints)
BA single-instance production database with no replication
CThe AWS root account's primary security console
DA long-lived stateful session server with sticky sessions for years
Answer & Solution
Correct answer: A. Stateless, fault-tolerant batch processing (e.g. EMR data processing, CI/CD runners, ML training that can resume from checkpoints)
Spot suits anything that can be interrupted, restarted, and parallelised. Stateful single-instance DBs, sticky session stores, or admin consoles are the worst fits.
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