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GCDL Practice Question: A logistics company needs to send millions of…
This GCDL practice question tests your understanding of a logistics company needs to send millions of…. 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 logistics company needs to send millions of shipment status updates per day from IoT tracking devices to backend systems for processing and storage. The solution must decouple the tracking devices from the backend and handle traffic spikes without losing messages. Which Google Cloud product best fits this asynchronous messaging requirement?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Cloud SQL, to store each tracking update as a row in a relational database as it arrives
Cloud SQL is a transactional database, not a messaging service. It doesn't decouple producers from consumers or provide message buffering during traffic spikes. Writing millions of rows directly from IoT devices would create a tight coupling and potential bottleneck.
B
Best answer
Cloud Pub/Sub, Google's fully managed messaging service that decouples producers from consumers and handles massive message volumes reliably
Pub/Sub is purpose-built for this pattern. IoT devices publish messages to a Pub/Sub topic; backend systems subscribe and process at their own rate. Pub/Sub buffers messages during spikes, guarantees at-least-once delivery, and scales to millions of messages per second without configuration changes.
C
Distractor review
Cloud Storage, to have each device upload a file containing its status update
Cloud Storage is an object store, not a messaging system. File uploads from millions of devices would not provide real-time decoupling, at-least-once delivery guarantees, or efficient message consumption by backend subscribers.
D
Distractor review
Cloud Load Balancing, to distribute incoming tracking requests evenly across backend servers
Load balancing distributes synchronous HTTP requests across servers but does not decouple producers from consumers or provide message durability. A spike that exceeds backend capacity would still lose requests.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
Related GCDL practice-question pages
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More questions from this exam
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Question 1
A traditional retailer currently maintains its own data centers, purchasing servers every 3–5 years and paying for facilities, power, and staff regardless of demand. When it migrates its workloads to the public cloud, which change in cost model does it experience?
Question 2
An e-commerce company plans its infrastructure for peak shopping events (e.g., Black Friday) which drive 50× normal traffic. On-premises, they must maintain 50× capacity year-round. In the cloud, they provision 50× capacity only during peak periods. Which cloud characteristic enables this cost optimization?
Question 3
Which term describes the process by which organizations integrate digital technology into all areas of their business, fundamentally changing how they operate and deliver value to customers?
Question 4
When a company moves from maintaining its own data center to using Google Cloud, which operational responsibility does Google assume that the company previously managed?
Question 5
A hospital runs a patient records system that must remain on-premises due to strict regulatory data residency requirements. However, they also want to use cloud-based AI for diagnostic imaging analysis. Which cloud deployment model best describes their architecture?
Question 6
What is virtualization in the context of cloud computing, and why is it fundamental to how cloud providers deliver services?
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FAQ
Questions learners often ask
What does this GCDL question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Cloud Pub/Sub, Google's fully managed messaging service that decouples producers from consumers and handles massive message volumes reliably — Pub/Sub is Google Cloud's fully managed, globally scalable asynchronous messaging service. Publishers (IoT devices) push messages to a topic without knowing who consumes them; subscribers pull messages at their own pace. Pub/Sub decouples producers from consumers, automatically scales to billions of messages per day, and durably stores messages until they are acknowledged — ensuring no messages are lost even during backend processing spikes.
What should I do if I get this GCDL question wrong?
Identify which GCDL 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.
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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.