The answer is an incorrect fabric name in the Ansible inventory for that site. This is the most likely cause because the Ansible ACI EPG module uses the `host` or `fabric_name` variable in the inventory to determine which APIC cluster to connect to; when the fabric name is wrong, the module queries a different APIC where the object truly does not exist, even though the EPG is present on the intended fabric. On the Cisco DCCOR 350-601 exam, this scenario tests your understanding of how Ansible inventory variables map to ACI fabrics, and a common trap is assuming the error means the EPG is missing when the real issue is a misdirected connection. Remember the memory tip: “Fabric name first, object exists later”—always verify the inventory’s `host` or `fabric_name` matches the target APIC before troubleshooting object existence.
350-601 Automation Practice Question
This 350-601 practice question tests your understanding of automation. 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.
A financial services company operates a multi-site data center with Cisco ACI. The automation team uses Ansible Tower to manage configurations. They have a playbook that configures EPGs using the 'aci_epg' module. The playbook runs successfully for most sites but fails on one site with the error 'Object 'uni/tn-Tenant1/ap-AP1/epg-EPG1' doesn't exist'. The engineer checks the ACI fabric and confirms that the tenant, application profile, and EPG exist on that site. The playbook uses the same credentials and variables across all sites. What is the most likely cause of the failure?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The fabric name in the Ansible inventory is incorrect for that site
The error 'Object doesn't exist' despite the EPG being present on the ACI fabric indicates that Ansible is targeting the wrong fabric or APIC. Since the playbook uses the same credentials and variables across all sites, the most likely cause is an incorrect fabric name in the Ansible inventory for that specific site, causing the module to query a different APIC cluster where the object does not exist.
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.
✗
The Ansible Tower job runs with a different user that lacks permissions on that site
Why it's wrong here
Permission errors would show as authorization failure, not object not found.
✗
The ACI APIC version is incompatible with the Ansible module
Why it's wrong here
Would cause failures across all sites, not just one.
✗
The EPG name in the playbook has a typo that only affects this site
Why it's wrong here
A typo would affect all sites using that variable.
✓
The fabric name in the Ansible inventory is incorrect for that site
Why this is correct
Leads to connection to wrong APIC where EPG doesn't exist.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the concept that Ansible inventory variables (like fabric hostname or APIC IP) must match the target site, and candidates mistakenly focus on credentials or module syntax instead of verifying the inventory configuration for each site.
Trap categories for this question
Command / output trap
Permission errors would show as authorization failure, not object not found.
Detailed technical explanation
How to think about this question
The 'aci_epg' Ansible module uses the APIC REST API to query objects under the specified fabric (via the 'host' or 'fabric' inventory variable). If the inventory points to a different APIC cluster (e.g., a test or DR fabric), the module will look for the object in that fabric's managed object database (MOB). The APIC's REST API returns a '404' or 'object doesn't exist' when the distinguished name (DN) is not found in the target fabric's MOB, even if the object exists in another fabric.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Automation — This question tests Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The fabric name in the Ansible inventory is incorrect for that site — The error 'Object doesn't exist' despite the EPG being present on the ACI fabric indicates that Ansible is targeting the wrong fabric or APIC. Since the playbook uses the same credentials and variables across all sites, the most likely cause is an incorrect fabric name in the Ansible inventory for that specific site, causing the module to query a different APIC cluster where the object does not exist.
What should I do if I get this 350-601 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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