CV0-004 Cloud Architecture and Design Practice Question
A cloud administrator is optimizing costs for a batch processing workload that runs nightly for 2 hours. The workload can tolerate interruptions. Which THREE purchasing options should the administrator consider? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Preemptible VMs
Correct answer: Preemptible VMs, Spot instances, and On-demand instances. For a batch processing workload that runs nightly for only 2 hours and can tolerate interruptions, cost optimization favors using interruptible instances like Preemptible VMs (Google Cloud) or Spot instances (AWS/Azure) because they offer significant discounts and are suitable for fault-tolerant workloads. On-demand instances are also an option to consider when interruptible instances are not available or if the workload requires guaranteed capacity, though they are more expensive. Reserved instances or dedicated hosts are not cost-effective for such short, periodic workloads because they require long-term commitments (1 or 3 years) and are designed for steady-state usage. Therefore, the three options to consider are Preemptible VMs, Spot instances, and On-demand instances.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Preemptible VMs
Why this is correct
Preemptible VMs are cost-effective and can be interrupted, ideal for batch jobs.
- ✓
Spot instances
Why this is correct
Spot instances offer large discounts and are suitable for interruption-tolerant workloads.
- ✗
Dedicated hosts
Why it's wrong here
Dedicated hosts are expensive and unnecessary for this workload.
- ✗
Reserved instances
Why it's wrong here
Reserved instances require a 1- or 3-year commitment and are not cost-effective for a 2-hour nightly job.
- ✓
On-demand instances
Why this is correct
On-demand instances are flexible but more expensive; however, they can be used as a fallback or for critical portions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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