The correct choice is Eventarc, because it is purpose-built to route event-driven triggers like Cloud Storage object finalize events directly to Cloud Run jobs using the CloudEvents format. When a file upload completes, Eventarc captures the storage notification and delivers it as an event payload to the Cloud Run job, enabling serverless, asynchronous processing without polling or custom middleware. On the Google Professional Cloud Developer exam, this scenario tests your understanding of how Eventarc decouples event sources from compute targets—a common trap is confusing Cloud Scheduler’s time-based triggers or assuming Pub/Sub alone can invoke a job, but Eventarc handles the subscription and routing automatically. Remember the memory tip: “Eventarc is the event arc that connects storage to jobs,” so when you see “trigger on upload,” think Eventarc first.
PCD Integrating Google Cloud services Practice Question
This PCD practice question tests your understanding of integrating google cloud services. 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 company wants to trigger a Cloud Run job every time a new file is uploaded to a Cloud Storage bucket. Which integration should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Eventarc to create a trigger that routes Cloud Storage events to the Cloud Run job.
Option C is correct because Eventarc can route Cloud Storage events (like object finalize) to Cloud Run jobs via CloudEvents. Option A is wrong because Cloud Scheduler is time-based, not event-based. Option B is wrong because Cloud Functions can be triggered by storage events, but the question asks for Cloud Run job. Option D is wrong because Pub/Sub alone cannot directly trigger a Cloud Run job without a subscription or push endpoint.
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.
✗
Use Cloud Pub/Sub notifications from the bucket and create a push subscription to the Cloud Run job.
Why it's wrong here
Cloud Run jobs do not have an HTTP endpoint to receive Pub/Sub push directly; they require a service invocation.
✗
Use Cloud Scheduler to poll the bucket and invoke the Cloud Run job every minute.
Why it's wrong here
Polling is inefficient and not event-driven.
✓
Use Eventarc to create a trigger that routes Cloud Storage events to the Cloud Run job.
Why this is correct
Eventarc listens to events and delivers them to Cloud Run jobs.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Cloud Functions to listen for storage events and then call the Cloud Run job via HTTP.
Why it's wrong here
This adds an extra step; Eventarc can directly trigger Cloud Run jobs.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which PCD 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.
Integrating Google Cloud services — This question tests Integrating Google Cloud services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Eventarc to create a trigger that routes Cloud Storage events to the Cloud Run job. — Option C is correct because Eventarc can route Cloud Storage events (like object finalize) to Cloud Run jobs via CloudEvents. Option A is wrong because Cloud Scheduler is time-based, not event-based. Option B is wrong because Cloud Functions can be triggered by storage events, but the question asks for Cloud Run job. Option D is wrong because Pub/Sub alone cannot directly trigger a Cloud Run job without a subscription or push endpoint.
What should I do if I get this PCD question wrong?
Identify which PCD 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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