PAS-C01 Operations and Maintenance Practice Question
A company runs SAP on AWS and wants to ensure that all API calls to create, modify, or delete EC2 instances are logged for auditing. Which TWO AWS services can be used together to achieve this? (Choose two.)
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
✓
AWS CloudTrail
AWS CloudTrail logs API calls to create, modify, or delete EC2 instances. Amazon CloudWatch Logs can store and analyze the CloudTrail logs for auditing. Option B (Amazon S3 server access logs) logs access to S3 buckets, not EC2 API calls. Option C (AWS Config) tracks configuration changes but does not log all API calls. Option E (Amazon VPC Flow Logs) captures network traffic, not API calls.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS CloudTrail
Why this is correct
CloudTrail records all EC2 API calls.
- ✗
Amazon S3 server access logs
Why it's wrong here
These log S3 access, not EC2 API calls.
- ✗
AWS Config
Why it's wrong here
AWS Config records configuration changes, not all API calls.
- ✓
Amazon CloudWatch Logs
Why this is correct
CloudWatch Logs can store and monitor CloudTrail logs.
- ✗
Amazon VPC Flow Logs
Why it's wrong here
Flow Logs capture network traffic, not API calls.
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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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-C01 practice question is part of Courseiva's free Amazon Web Services 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 PAS-C01 exam.