- A
Configure a Cloud Storage Pub/Sub notification → Cloud Function that launches a Dataflow job for each new file.
GCS object notifications to Pub/Sub trigger a Cloud Function that launches a Dataflow job. Dataflow handles files up to 5 GB within 10 minutes using parallel workers, and the event-driven architecture processes files exactly when they land.
- B
Use a Cloud Scheduler cron job that scans Cloud Storage every minute and processes new files with Dataflow.
Why wrong: Polling every minute adds up to 60-second latency per file and processes files on a schedule, not event-driven. It also creates unnecessary scans when no files arrive.
- C
Use Cloud Functions triggered by GCS events to read and transform the 5 GB file directly.
Why wrong: Cloud Functions have a 9-minute timeout (gen1) or 60 minutes (gen2), and 8 GB memory max. Processing a 5 GB file in a single function is risky and doesn't handle transformation at scale.
- D
Use BigQuery Data Transfer Service to load files from Cloud Storage on a schedule.
Why wrong: BigQuery Data Transfer Service loads data on a schedule (minimum 15-minute intervals), not event-driven. It doesn't support custom transformation logic during load.
Quick Answer
The answer is to configure a Cloud Storage Pub/Sub notification with a Cloud Function that launches a Dataflow job for each new file. This approach is correct because Pub/Sub notifications provide the event-driven trigger exactly when files land, while the Cloud Function acts as a lightweight orchestrator—it does not process the data itself but kicks off a Dataflow job, which can autoscale to handle files up to 5 GB and complete within the 10-minute window. On the Google Associate Cloud Engineer exam, this scenario tests your understanding of decoupled, serverless event-driven architectures for large-file pipelines; a common trap is trying to use a Cloud Function to process the file directly, which would hit its 9-minute timeout and memory limits. Remember the key: Cloud Function for orchestration, Dataflow for heavy lifting—think “trigger and transform, not trigger and drown.”
Google ACE Planning and configuring a cloud solution Practice Question
This ACE practice question tests your understanding of planning and configuring a cloud solution. 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.
You are designing a data pipeline that reads from Cloud Storage, transforms data, and writes to BigQuery. The pipeline must process data exactly when new files land (event-driven), handle files up to 5 GB, and complete within 10 minutes. Which approach best meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Configure a Cloud Storage Pub/Sub notification → Cloud Function that launches a Dataflow job for each new file.
Option A is correct because Cloud Storage Pub/Sub notifications provide event-driven triggers for each new file, and launching a Dataflow job via a Cloud Function allows processing of up to 5 GB files within the 10-minute window. Dataflow’s autoscaling and streaming capabilities handle large files efficiently, while the Cloud Function acts as a lightweight orchestrator without processing the data itself.
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.
- ✓
Configure a Cloud Storage Pub/Sub notification → Cloud Function that launches a Dataflow job for each new file.
Why this is correct
GCS object notifications to Pub/Sub trigger a Cloud Function that launches a Dataflow job. Dataflow handles files up to 5 GB within 10 minutes using parallel workers, and the event-driven architecture processes files exactly when they land.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a Cloud Scheduler cron job that scans Cloud Storage every minute and processes new files with Dataflow.
Why it's wrong here
Polling every minute adds up to 60-second latency per file and processes files on a schedule, not event-driven. It also creates unnecessary scans when no files arrive.
- ✗
Use Cloud Functions triggered by GCS events to read and transform the 5 GB file directly.
Why it's wrong here
Cloud Functions have a 9-minute timeout (gen1) or 60 minutes (gen2), and 8 GB memory max. Processing a 5 GB file in a single function is risky and doesn't handle transformation at scale.
- ✗
Use BigQuery Data Transfer Service to load files from Cloud Storage on a schedule.
Why it's wrong here
BigQuery Data Transfer Service loads data on a schedule (minimum 15-minute intervals), not event-driven. It doesn't support custom transformation logic during load.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that Cloud Functions can handle large data processing tasks directly, but the trap here is ignoring the 9-minute timeout and 2 GB memory limit, which make them unsuitable for files over a few hundred megabytes.
Detailed technical explanation
How to think about this question
Cloud Storage Pub/Sub notifications use the ObjectFinalize event type, which publishes a message to a Pub/Sub topic when a new object is created. The Cloud Function subscribes to this topic and launches a Dataflow template job, passing the file URI as a parameter. Dataflow can then use autoscaling workers to process the file in parallel, leveraging the 10-minute window by distributing the load across multiple VMs, and writing results directly to BigQuery via the BigQuery I/O connector.
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 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.
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FAQ
Questions learners often ask
What does this ACE question test?
Planning and configuring a cloud solution — This question tests Planning and configuring a cloud solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a Cloud Storage Pub/Sub notification → Cloud Function that launches a Dataflow job for each new file. — Option A is correct because Cloud Storage Pub/Sub notifications provide event-driven triggers for each new file, and launching a Dataflow job via a Cloud Function allows processing of up to 5 GB files within the 10-minute window. Dataflow’s autoscaling and streaming capabilities handle large files efficiently, while the Cloud Function acts as a lightweight orchestrator without processing the data itself.
What should I do if I get this ACE 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
This ACE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ACE exam.
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