- A
Reserved instances for 1 year
Why wrong: Reserved instances require a longer commitment and may not be cost-effective for 2 hours daily.
- B
Spot instances
Spot instances are cheaper and suitable for interruptible workloads.
- C
On-demand instances
Why wrong: On-demand is more expensive for regular, short jobs.
- D
Dedicated hosts
Why wrong: Dedicated hosts are expensive and not needed for this workload.
Question 620 of 997
CV0-004 Cloud Architecture and Design Practice Question
This CV0-004 practice question tests your understanding of cloud architecture and design. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A cloud architect is choosing a compute pricing model for a batch processing job that runs for 2 hours every night. The job can be interrupted. Which option is most cost-effective?
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
✓
Spot instances
Spot instances are the most cost-effective option because the batch processing job is fault-tolerant (can be interrupted) and runs for a fixed, short duration (2 hours nightly). Spot instances offer significant discounts (often 60-90% off on-demand pricing) by leveraging unused cloud capacity, which can be reclaimed with a 2-minute warning. This aligns perfectly with the workload's tolerance for interruption and its predictable but non-critical schedule.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Reserved instances for 1 year
Why it's wrong here
Reserved instances require a longer commitment and may not be cost-effective for 2 hours daily.
- ✓
Spot instances
Why this is correct
Spot instances are cheaper and suitable for interruptible workloads.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
On-demand instances
Why it's wrong here
On-demand is more expensive for regular, short jobs.
- ✗
Dedicated hosts
Why it's wrong here
Dedicated hosts are expensive and not needed for this workload.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that Reserved instances are always cheaper for any recurring workload, but the trap here is that the short, interruptible nature of the job makes spot instances far more cost-effective than committing to a long-term reservation.
Detailed technical explanation
How to think about this question
Spot instance pricing fluctuates based on real-time supply and demand of spare compute capacity, and the instance can be terminated by the cloud provider when capacity is needed elsewhere. To handle interruptions gracefully, the batch job should be designed to checkpoint progress to persistent storage (e.g., Amazon S3 or Azure Blob) and resume from the last checkpoint when a new spot instance is provisioned. In AWS, the maximum price you are willing to pay per instance hour can be set, but with the current market model, you pay the spot price which is typically much lower than on-demand.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this CV0-004 question test?
Cloud Architecture and Design — This question tests Cloud Architecture and Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Spot instances — Spot instances are the most cost-effective option because the batch processing job is fault-tolerant (can be interrupted) and runs for a fixed, short duration (2 hours nightly). Spot instances offer significant discounts (often 60-90% off on-demand pricing) by leveraging unused cloud capacity, which can be reclaimed with a 2-minute warning. This aligns perfectly with the workload's tolerance for interruption and its predictable but non-critical schedule.
What should I do if I get this CV0-004 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
This CV0-004 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CV0-004 exam.
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