Cloud Digital Leader Practice Question: Google Cloud products, services, and solutions
This GCDL practice question tests your understanding of google cloud products, services, and solutions. 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 project manager wants a cost-effective way to run batch processing jobs that run for a few hours each night. The jobs are fault-tolerant and can be interrupted. Which Compute Engine option is most suitable?
Why wrong: These are performance-optimized, not cost-optimized for interruptible batch jobs.
B
Regular VMs with committed use discounts
Why wrong: Committed use discounts require a 1-year commitment, but the jobs run nightly, so regular VMs would be more expensive than preemptible for this short-duration workload.
C
Sole-tenant nodes
Why wrong: Sole-tenant nodes are for isolation, not cost savings.
D
Preemptible VMs
Preemptible VMs are significantly cheaper and can be terminated at any time, but suitable for fault-tolerant batch jobs.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Preemptible VMs
Preemptible VMs are Compute Engine instances that last up to 24 hours and can be terminated at any time by Google Cloud, making them ideal for fault-tolerant, interruptible batch jobs that run for a few hours each night. They offer up to 80% cost savings compared to regular VMs, which aligns perfectly with the project manager's requirement for a cost-effective solution.
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.
✗
N2 high-CPU VMs
Why it's wrong here
These are performance-optimized, not cost-optimized for interruptible batch jobs.
✗
Regular VMs with committed use discounts
Why it's wrong here
Committed use discounts require a 1-year commitment, but the jobs run nightly, so regular VMs would be more expensive than preemptible for this short-duration workload.
✗
Sole-tenant nodes
Why it's wrong here
Sole-tenant nodes are for isolation, not cost savings.
✓
Preemptible VMs
Why this is correct
Preemptible VMs are significantly cheaper and can be terminated at any time, but suitable for fault-tolerant batch jobs.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that preemptible VMs are only for short-lived tasks, but the trap here is that candidates overlook the 'fault-tolerant and can be interrupted' requirement and choose committed use discounts, failing to recognize that preemptible VMs are the most cost-effective option for nightly batch jobs that can handle interruptions.
Detailed technical explanation
How to think about this question
Preemptible VMs use Google's spare compute capacity and can be terminated with a 30-second warning when capacity is reclaimed, making them unsuitable for stateful workloads but perfect for stateless, checkpointable batch jobs. Under the hood, they are identical to regular VMs in terms of machine types and networking, but they are priced at a fraction of the cost (typically $0.01 per vCPU per hour) and do not offer live migration or automatic restart. A real-world scenario is running nightly data ETL pipelines that save intermediate results to Cloud Storage, allowing seamless resumption if a preemptible VM is terminated.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this GCDL question in full detail.
Google Cloud products, services, and solutions — This question tests Google Cloud products, services, and solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Preemptible VMs — Preemptible VMs are Compute Engine instances that last up to 24 hours and can be terminated at any time by Google Cloud, making them ideal for fault-tolerant, interruptible batch jobs that run for a few hours each night. They offer up to 80% cost savings compared to regular VMs, which aligns perfectly with the project manager's requirement for a cost-effective solution.
What should I do if I get this GCDL question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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