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A development team wants to build a custom web application. They choose a cloud service that provides the runtime environment, operating system, and middleware, but the team is responsible for writing and deploying their own code. The provider automatically applies patches to the underlying infrastructure. Which cloud service model best describes this approach?

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A development team wants to build a custom web application. They choose a cloud service that provides the runtime environment, operating system, and middleware, but the team is responsible for writing and deploying their own code. The provider automatically applies patches to the underlying infrastructure. Which cloud service model best describes this approach?

Full question →

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

Infrastructure as a Service (IaaS)

Incorrect. IaaS offers virtual machines and storage, but the customer must manage the operating system and middleware patching.

B

Best answer

Platform as a Service (PaaS)

Correct. PaaS provides the platform infrastructure (runtime, OS, middleware) and manages it, allowing the team to focus on code deployment.

C

Distractor review

Software as a Service (SaaS)

Incorrect. SaaS delivers complete applications over the internet; the customer does not deploy custom code.

D

Distractor review

Function as a Service (FaaS)

Incorrect. FaaS is serverless compute but does not provide a full platform for custom web applications with middleware.

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.

Related practice questions

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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

During requirements gathering, an IT manager says the organization must let users provision resources from a portal without provider interaction. Cloud concept or benefit best matches this requirement?

Question 2

A compliance-aware administrator is selecting the right Microsoft 365 capability to use Microsoft 365 and another public cloud provider for different workloads. Cloud concept or benefit best matches this requirement?

Question 3

While preparing a Microsoft 365 adoption plan, a consultant is asked to manage leads, opportunities, customer accounts, and sales processes. Microsoft 365 app or service is the best fit?

Question 4

A project manager needs to create a detailed project schedule with a Gantt chart view, task dependencies, critical path analysis, and milestones. The schedule must be shared with team members who can update their tasks, and the manager wants to track progress against a baseline. Which Microsoft 365 app is specifically designed for this type of project management?

Question 5

A project manager wants to schedule a meeting with team members to discuss project progress. They need to find a time that works for everyone based on their calendars. Which Microsoft 365 app should they use?

Question 6

A project manager wants to create a visual dashboard that tracks project tasks, deadlines, and progress. The dashboard should pull data from a Microsoft List and update in real time. Which Microsoft 365 app is best suited for building this interactive dashboard?

FAQ

Questions learners often ask

What does this MS-900 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Platform as a Service (PaaS) — Platform as a Service (PaaS) provides a managed platform for developing and running applications, including the OS and middleware, while the customer manages only the application and data. Infrastructure as a Service (IaaS) gives more control but requires managing the OS. Software as a Service (SaaS) provides ready-to-use applications. Function as a Service (FaaS) is serverless compute, not full platform management.

What should I do if I get this MS-900 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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