The correct answer is that using a CNAME record for the DNS zone apex is not allowed. This is because DNS standards explicitly prohibit CNAME records at the root domain (e.g., example.com), as a CNAME must coexist with other record types like SOA and NS, which the zone apex requires; instead, you must use an Alias record in Route 53 to point the apex to an Application Load Balancer. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this concept frequently appears as a trap where candidates assume a CNAME works for any domain, but the exam tests your understanding of DNS limitations specific to SAP system routing. A common memory tip is “CNAMEs are for children, not the root”—meaning CNAMEs only work on subdomains, while the apex needs an Alias to handle the ALB’s dynamic IPs.
PAS-C01 Operations and Maintenance Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Exhibit
Refer to the exhibit.
ResourceRecordSet:
Type: AWS::Route53::RecordSet
Properties:
HostedZoneId: Z3AADJGX6KTTL2
Name: sap.example.com.
Type: CNAME
TTL: 60
ResourceRecords:
- sap-alb-1234567890.elb.amazonaws.com
Refer to the exhibit. An SAP administrator has created this CloudFormation snippet to create a Route 53 record for an SAP system. The record is intended to point to an Application Load Balancer. What is a potential issue with this configuration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using a CNAME record for the root domain (zone apex) is not allowed.
Option D is correct because using a CNAME record for the zone apex (e.g., example.com) is not allowed by DNS standards. CNAME records can only be used for subdomains. Option A is wrong because TTL of 60 seconds is acceptable. Option B is wrong because the ALB endpoint is a valid FQDN. Option C is wrong because Route 53 supports CNAME records to external endpoints.
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.
✓
Using a CNAME record for the root domain (zone apex) is not allowed.
Why this is correct
DNS standards prohibit CNAME at the zone apex; an Alias record should be used instead.
Related concept
Read the scenario before looking for a memorised answer.
✗
The TTL value of 60 seconds is too low for production use.
Why it's wrong here
A TTL of 60 seconds is acceptable for dynamic environments.
✗
The RecordSet type should be A instead of CNAME for an ALB.
Why it's wrong here
ALB endpoints are DNS names, so CNAME is appropriate.
✗
The ResourceRecords value should be an IP address, not a DNS name.
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Operations and Maintenance — This question tests Operations and Maintenance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Using a CNAME record for the root domain (zone apex) is not allowed. — Option D is correct because using a CNAME record for the zone apex (e.g., example.com) is not allowed by DNS standards. CNAME records can only be used for subdomains. Option A is wrong because TTL of 60 seconds is acceptable. Option B is wrong because the ALB endpoint is a valid FQDN. Option C is wrong because Route 53 supports CNAME records to external endpoints.
What should I do if I get this PAS-C01 question wrong?
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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