The correct answer is that the file was uploaded to the workspace filesystem, not to DBFS. This is because Azure Databricks has two distinct storage locations: the workspace filesystem, which is tied to your interactive notebook environment, and DBFS, which is a distributed file system mounted to all clusters. When you upload a file via the Databricks UI, it often lands in the workspace filesystem by default, making it accessible in interactive notebooks but invisible to job clusters, which are ephemeral and only have direct access to DBFS paths unless explicitly mounted. On the DP-203 exam, this scenario tests your understanding of how job clusters differ from interactive clusters, specifically regarding file persistence and access scopes. A common trap is assuming that any file visible in your notebook is automatically available to jobs. Remember the memory tip: "Workspace for working, DBFS for deploying" — if a job can't find a file, check where it was uploaded.
DP-203 Develop data processing Practice Question
This DP-203 practice question tests your understanding of develop data processing. 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.
You are running a Python script in Azure Databricks that reads a CSV file from DBFS. The script runs successfully in an interactive notebook but fails when executed as a job with the error: 'Path does not exist: dbfs:/tmp/data.csv'. What is the most likely cause?
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 file was uploaded to the workspace filesystem, not to DBFS.
Option C is correct because job clusters are ephemeral and may not have the file in DBFS if it was uploaded to the workspace files or requires mounting. Option A is incorrect because the cluster has access. Option B is incorrect because Python is supported. Option D is incorrect because the file exists in interactive but not in job context.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 job is using a different runtime that does not support Python.
Why it's wrong here
All Databricks runtimes support Python.
✗
The file is too large for DBFS.
Why it's wrong here
Size does not cause path not found.
✗
The job cluster does not have permission to access DBFS.
Why it's wrong here
Job clusters have access to DBFS by default.
✓
The file was uploaded to the workspace filesystem, not to DBFS.
Why this is correct
Workspace files are not automatically in DBFS.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-203 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-203 NAT questions on configuration and troubleshooting.
Develop data processing — This question tests Develop data processing — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The file was uploaded to the workspace filesystem, not to DBFS. — Option C is correct because job clusters are ephemeral and may not have the file in DBFS if it was uploaded to the workspace files or requires mounting. Option A is incorrect because the cluster has access. Option B is incorrect because Python is supported. Option D is incorrect because the file exists in interactive but not in job context.
What should I do if I get this DP-203 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DP-203 NAT questions on configuration and troubleshooting.
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?
Static NAT maps one inside address to one outside address.
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