CV0-004 Cloud Architecture and Design Practice Question
A cloud engineer is optimizing costs for a data analytics workload that runs periodically. The workload processes large datasets stored in Amazon S3 and runs on EC2 instances. Which THREE strategies should the engineer consider to reduce costs? (Select 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
✓
Implement S3 Lifecycle policies to transition older data to S3 Glacier
Using spot instances reduces compute cost for interruptible workloads. S3 lifecycle policies move old data to cheaper storage classes. Selecting the correct instance type (rightsizing) avoids overprovisioning.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Implement S3 Lifecycle policies to transition older data to S3 Glacier
Why this is correct
Lifecycle policies reduce storage costs by moving data to cheaper tiers.
- ✗
Provision large instances to reduce processing time
Why it's wrong here
Overprovisioning increases cost; rightsizing is better.
- ✓
Choose the correct instance type based on resource requirements
Why this is correct
Rightsizing ensures you pay for only what you need.
- ✓
Use Spot Instances for the compute nodes
Why this is correct
Spot instances are cost-effective for fault-tolerant, batch workloads.
- ✗
Use on-demand instances exclusively
Why it's wrong here
On-demand is more expensive; spot is cheaper for interruptible workloads.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.