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GCDL Practice Question: A business leader asks: 'What is the difference…
This GCDL practice question tests your understanding of a business leader asks: 'what is the difference…. 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 business leader asks: 'What is the difference between a data center region and an availability zone in Google Cloud?' Which explanation is most accurate?
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
A region is a single data center building; an availability zone is a floor within that building
Regions span multiple buildings (multiple zones), and zones are distinct facilities, not floors of a single building. This fundamentally mischaracterizes the geographic scale and independence of the concepts.
B
Best answer
A region is a geographic area containing multiple independent zones; each zone is a distinct facility with independent power, cooling, and networking — failures in one zone don't affect other zones in the region
This is the correct definition. GCP regions (e.g., us-central1) contain multiple zones (a, b, c, d). Each zone is independent infrastructure. A zonal failure (power outage, cooling failure) doesn't propagate to other zones. Customers deploy across multiple zones within a region for high availability against zone-level failures.
C
Distractor review
A region is equivalent to an availability zone; both terms refer to a single data center
Regions and zones are not equivalent. A region is larger (contains multiple zones). Using them interchangeably leads to incorrect architecture decisions about fault tolerance.
D
Distractor review
An availability zone is larger than a region and spans multiple geographic areas for global redundancy
This reverses the relationship. Regions are the larger geographic construct; zones are subsets within a region. Zones do not span multiple geographic areas — that's what multi-region deployments achieve.
Common exam trap
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Technical deep dive
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Related practice questions
Related GCDL practice-question pages
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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?
OSPF neighbours must agree on key parameters.
What is the correct answer to this question?
The correct answer is: A region is a geographic area containing multiple independent zones; each zone is a distinct facility with independent power, cooling, and networking — failures in one zone don't affect other zones in the region — In Google Cloud, a region is a geographic area (e.g., us-central1 in Iowa) containing multiple independent facilities. An availability zone (called a 'zone' in GCP) is a distinct data center facility within a region with independent power, cooling, and networking. Zones within a region are close enough for low-latency communication but independent enough that a failure in one zone doesn't affect others.
What should I do if I get this GCDL question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related GCDL OSPF questions on adjacency and route selection.
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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.