This GCDL practice question tests your understanding of fundamental cloud concepts. 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.
A developer needs to run a custom analysis script on a large dataset once a month. The script runs for about 10 minutes. They want to avoid provisioning servers and only pay for the actual compute time used. Which Google Cloud compute option should they choose?
App Engine Standard Environment
Why wrong: App Engine may have minimum instance idle costs.
Compute Engine preemptible VM
Why wrong: Even preemptible VMs are billed per hour and require provisioning.
Google Kubernetes Engine with a single pod
Why wrong: GKE requires a cluster that incurs costs even when idle.
Cloud Functions
Cloud Functions is serverless, execute on demand, and charge only for compute time.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Cloud Functions
Cloud Functions is the correct choice because it is a serverless, event-driven compute service that automatically scales to zero when not in use, charging only for the actual compute time consumed during execution. The 10-minute monthly script fits within Cloud Functions' 9-minute maximum timeout (recently extended to 60 minutes for HTTP-triggered functions in some regions), making it ideal for infrequent, short-lived tasks without provisioning servers.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
App Engine Standard Environment
Why it's wrong here
App Engine may have minimum instance idle costs.
Compute Engine preemptible VM
Why it's wrong here
Even preemptible VMs are billed per hour and require provisioning.
Google Kubernetes Engine with a single pod
Why it's wrong here
GKE requires a cluster that incurs costs even when idle.
Cloud Functions
Why this is correct
Cloud Functions is serverless, execute on demand, and charge only for compute time.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Google Cloud often tests the misconception that serverless options like Cloud Functions cannot handle long-running tasks, but the 9-minute (or extended 60-minute) timeout is sufficient for many batch jobs, leading candidates to incorrectly choose preemptible VMs or Kubernetes for what is effectively a short-lived, infrequent workload.
Detailed technical explanation
Cloud Functions uses a container-based execution environment that spins up a new instance per invocation, with a cold start latency of a few hundred milliseconds to a few seconds depending on the runtime (e.g., Node.js, Python, Go). Under the hood, Google Cloud's Knative-based serverless platform manages the lifecycle, and the function can be triggered via HTTP, Cloud Pub/Sub, or Cloud Storage events, making it suitable for event-driven data processing. A real-world scenario is a monthly ETL pipeline that reads from BigQuery, transforms data, and writes results to Cloud Storage, where Cloud Functions' stateless nature and automatic scaling eliminate idle costs.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
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FAQ
Fundamental cloud concepts — This question tests Fundamental cloud concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Cloud Functions — Cloud Functions is the correct choice because it is a serverless, event-driven compute service that automatically scales to zero when not in use, charging only for the actual compute time consumed during execution. The 10-minute monthly script fits within Cloud Functions' 9-minute maximum timeout (recently extended to 60 minutes for HTTP-triggered functions in some regions), making it ideal for infrequent, short-lived tasks without provisioning servers.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This GCDL 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 GCDL exam.
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