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GCDL Practice Question: An architect explains that her cloud application…
This GCDL practice question tests your understanding of an architect explains that her cloud application…. 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.
An architect explains that her cloud application uses a 'loosely coupled architecture.' She contrasts it with a tightly coupled on-premises system where all components run in a single process. What is the primary operational benefit of loose coupling in a cloud environment?
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
Best answer
Loose coupling allows individual components to fail, scale, or be updated independently without cascading failures to the entire system
This is the primary operational benefit. When components communicate through queues and APIs rather than direct coupling, a failure in one component doesn't automatically bring down others. Each component can also scale independently based on its own load, and teams can deploy updates without coordinating a system-wide release.
B
Distractor review
Loosely coupled architectures require less developer expertise and are easier to build than monolithic applications
Distributed, loosely coupled systems are generally more complex to design, test, and operate than monoliths. The benefits are resilience and scalability, not development simplicity.
C
Distractor review
Loose coupling reduces cloud costs because fewer network calls are made between services
Loose coupling through message queues and APIs often increases the number of network calls and associated data transfer costs. Cost reduction is not the primary motivation.
D
Distractor review
Loosely coupled applications are always faster because messages are passed in memory rather than over the network
Loose coupling typically introduces network overhead (API calls, message queue latency) compared to in-process communication. The benefit is resilience and flexibility, not raw performance.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Loose coupling allows individual components to fail, scale, or be updated independently without cascading failures to the entire system — Loose coupling means components communicate through well-defined interfaces (APIs, message queues) rather than direct in-process calls. This provides operational resilience: individual components can fail, be updated, or scaled independently without cascading failures to the entire system. In tightly coupled systems, a single component failure can bring down the entire application. Loose coupling is foundational to cloud-native resilience and agility.
What should I do if I get this GCDL question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related GCDL NAT questions on configuration and troubleshooting.
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