Courseiva
← MS-900
Full test
mediummultiple choiceObjective-mapped

A company uses Infrastructure-as-a-Service (IaaS) from a cloud provider. They have deployed virtual machines running a custom application. The cloud provider supplies the physical hardware, networking, and storage. Who is responsible for patching the operating system of the virtual machines?

Question 1mediummultiple choice
Full question →

A company uses Infrastructure-as-a-Service (IaaS) from a cloud provider. They have deployed virtual machines running a custom application. The cloud provider supplies the physical hardware, networking, and storage. Who is responsible for patching the operating system of the virtual machines?

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

The cloud provider

The provider manages physical security and infrastructure, not the guest OS in IaaS.

B

Best answer

The customer

In IaaS, the customer is responsible for securing and patching the operating system and applications on the virtual machines.

C

Distractor review

Both the provider and the customer share equally

Responsibilities are divided; the provider handles the host, the customer handles the guest OS.

D

Distractor review

A third-party managed security service provider

While the customer could hire a third-party, the default responsibility lies with the customer under the IaaS model.

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

Related MS-900 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

MS-900 fundamentals practice questions

Practise MS-900 questions linked to MS-900 fundamentals.

MS-900 scenario practice questions

Practise MS-900 questions linked to MS-900 scenario.

MS-900 troubleshooting practice questions

Practise MS-900 questions linked to MS-900 troubleshooting.

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: The customer — In the IaaS shared responsibility model, the cloud provider is responsible for the physical infrastructure (hardware, network, storage), but the customer is responsible for managing the operating system, including patching, as well as the applications and data. In SaaS and PaaS, the provider takes more responsibility. The customer does not manage the physical hardware.

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.

Discussion

Loading comments…

Sign in to join the discussion.