Choose the description that is incorrect regarding serverless architecture.
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Choose the description that is incorrect regarding serverless architecture.
Show answer & explanation
Option C is incorrect because serverless architecture does NOT guarantee zero-second initialization. Cold starts are a well-known limitation in serverless computing—when a function is invoked after being idle, there is latency as the runtime environment spins up. This cold start delay can range from hundreds of milliseconds to several seconds depending on the platform and language. Options A, B, and D accurately describe serverless characteristics: on-demand execution and cost reduction (A), usage-based billing (B), and limited low-level OS tuning compared to IaaS (D).
Step-by-step Derivation:
- Evaluate each statement against documented serverless architecture properties.
- Option A: Correct—serverless functions execute on-demand and scale elastically, reducing idle costs.
- Option B: Correct—pay-per-execution model bills only when functions run; no requests = no charges.
- Option C: Incorrect—cold starts are a known drawback; initialization is NOT instantaneous when scaling up after inactivity. This is a trade-off of the serverless model.
- Option D: Correct—serverless abstracts infrastructure; you cannot tune kernel parameters or OS-level settings as freely as IaaS, sacrificing control for convenience.
- Answer: C is the only incorrect description.