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GCDL Practice Question: A company's monolithic application is difficult…
This GCDL practice question tests your understanding of a company's monolithic application is difficult…. 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 company's monolithic application is difficult to update because any change requires testing and redeploying the entire application, causing multi-hour downtime during updates. The team is considering a microservices architecture. What is the primary benefit of microservices in this context?
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
Each service can be updated and deployed independently, enabling teams to release changes faster with lower risk and without full-application downtime.
Independent deployability is the core microservices benefit for the described problem. Updating service A doesn't require redeploying services B, C, D — dramatically reducing deployment risk and duration.
B
Distractor review
Microservices always cost less than monolithic applications to run.
Microservices can actually cost more due to service-to-service communication overhead, multiple deployment pipelines, and distributed system complexity. The benefit is agility and independent deployability, not necessarily cost.
C
Distractor review
Microservices eliminate the need for testing because each service is small enough to be bug-free.
Microservices still require testing — arguably more complex testing due to distributed system interactions. Service size doesn't prevent bugs.
D
Distractor review
Microservices allow applications to run on any hardware without modification.
Hardware portability is a benefit of containers, not specifically microservices architecture. Microservices are an architectural pattern for service decomposition, not hardware abstraction.
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: Each service can be updated and deployed independently, enabling teams to release changes faster with lower risk and without full-application downtime. — Microservices architecture decomposes a monolithic application into small, independently deployable services. Each service can be updated, scaled, and deployed without affecting other services. This eliminates the 'entire-application-redeploy' problem — updating the payment service doesn't require redeploying the catalog or user management services. Cloud platforms support microservices with containers (GKE), serverless functions (Cloud Run), and managed messaging (Pub/Sub) for service communication.
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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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.