Fixing SCM Inventory Sync Failure Due to Credential Type Mismatch
This EX294 practice question tests your understanding of manage inventories and credentials. 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.
Exhibit
Refer to the exhibit.
```yaml
inventory_source:
name: Production Inventory
organization: Default
source: scm
source_project: "Ansible Inventory Repo"
source_path: "inventories/production/hosts.yml"
credential: "GitHub Personal Access Token"
update_on_launch: true
update_cache_timeout: 0
```
The administrator has noticed that the inventory sync fails with authentication errors. The GitHub Personal Access Token credential is of type 'Machine' instead of 'Source Control'.
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.
Exhibit
Refer to the exhibit.
```yaml
inventory_source:
name: Production Inventory
organization: Default
source: scm
source_project: "Ansible Inventory Repo"
source_path: "inventories/production/hosts.yml"
credential: "GitHub Personal Access Token"
update_on_launch: true
update_cache_timeout: 0
```
The administrator has noticed that the inventory sync fails with authentication errors. The GitHub Personal Access Token credential is of type 'Machine' instead of 'Source Control'.
A
The inventory must be of type 'file' rather than 'scm'.
Why wrong: The 'scm' source type pulls inventory from a source control project, which is correct for this setup.
B
The source_path is incorrect because it should be a directory, not a file.
Why wrong: The source_path can point to a specific file; this is not typically an authentication error.
C
The source_project should reference the project ID, not name.
Why wrong: Tower accepts both project names and IDs in this field; using a name is not an error.
D
The update_cache_timeout should be a positive integer.
Why wrong: A value of 0 disables caching and is valid; it does not cause authentication errors.
E
The credential type is incorrect; it should be a Source Control credential, not Machine.
A Machine credential is designed for SSH/WinRM, not for authenticating to a source control system. Using the appropriate credential type is essential.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The credential type is incorrect; it should be a Source Control credential, not Machine.
Option E is correct because the credential type must match the service. A Machine credential is used for SSH/WinRM access, not for source control authentication. When using an SCM project to source inventory, the credential should be a Source Control credential (e.g., for Git) to authenticate to the repository. Option A is incorrect because inventory type 'scm' is valid for sourcing from a project; the failure is credential-related, not inventory type. Option B is incorrect because source_path can point to either a file or a directory within the project. Option C is incorrect because source_project can accept either the project name or ID. Option D is incorrect because update_cache_timeout=0 is a valid value that disables caching.
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 inventory must be of type 'file' rather than 'scm'.
Why it's wrong here
The 'scm' source type pulls inventory from a source control project, which is correct for this setup.
✗
The source_path is incorrect because it should be a directory, not a file.
Why it's wrong here
The source_path can point to a specific file; this is not typically an authentication error.
✗
The source_project should reference the project ID, not name.
Why it's wrong here
Tower accepts both project names and IDs in this field; using a name is not an error.
✗
The update_cache_timeout should be a positive integer.
Why it's wrong here
A value of 0 disables caching and is valid; it does not cause authentication errors.
✓
The credential type is incorrect; it should be a Source Control credential, not Machine.
Why this is correct
A Machine credential is designed for SSH/WinRM, not for authenticating to a source control system. Using the appropriate credential type is essential.
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
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 practitioner preparing for the EX294 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.
Identify which EX294 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.
Manage inventories and credentials — This question tests Manage inventories and credentials — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The credential type is incorrect; it should be a Source Control credential, not Machine. — Option E is correct because the credential type must match the service. A Machine credential is used for SSH/WinRM access, not for source control authentication. When using an SCM project to source inventory, the credential should be a Source Control credential (e.g., for Git) to authenticate to the repository. Option A is incorrect because inventory type 'scm' is valid for sourcing from a project; the failure is credential-related, not inventory type. Option B is incorrect because source_path can point to either a file or a directory within the project. Option C is incorrect because source_project can accept either the project name or ID. Option D is incorrect because update_cache_timeout=0 is a valid value that disables caching.
What should I do if I get this EX294 question wrong?
Identify which EX294 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.
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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