Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A retail company hosts an e-commerce website on on-premises servers. During seasonal sales events, the website experiences traffic spikes that last for a few hours. Several years ago, the company purchased additional servers to handle these spikes, but those servers now sit idle for most of the year. The company is considering moving the website to Azure. Which benefit of cloud computing would most directly help the company avoid maintaining idle hardware while still being able to handle traffic spikes?
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
High availability
High availability refers to ensuring that services remain operational and accessible with minimal downtime, often through redundancy. It does not directly address the ability to scale resources dynamically to match fluctuating demand.
B
Best answer
Elasticity
Elasticity is the ability of a cloud service to automatically increase or decrease the resources allocated to a workload based on real-time demand. This allows the company to handle traffic spikes without maintaining permanently provisioned hardware, and to pay only for what is used.
C
Distractor review
Disaster recovery
Disaster recovery involves processes and tools to restore IT infrastructure and data after a disruptive event (e.g., natural disaster, cyberattack). It does not address the need to dynamically scale resources to handle variable traffic.
D
Distractor review
Geo-redundancy
Geo-redundancy is a data replication feature that copies data to a secondary Azure region for durability and disaster recovery. It does not provide the ability to scale compute or application resources in response to traffic changes.
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.
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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 developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?
Question 2
A solutions architect is designing a storage solution for a large media company. The company needs to store video files that are accessed infrequently but must be retained for several years for compliance. Which two Azure storage options meet these requirements? (Select two.)
Question 3
A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?
Question 4
A company wants to enforce a set of security policies across all their Azure subscriptions. They have created several individual policy definitions. Which Azure construct should they use to group these policies together and assign them as a single package?
Question 5
A company deploys a line-of-business application on an Azure virtual machine. The IT team wants to ensure the application remains secure. According to the shared responsibility model, which of the following security tasks is the sole responsibility of the customer (the company)?
Question 6
A company develops a web API that runs on Azure App Service. The development team wants to deploy a new version of the API to a staging environment, run integration tests against it, and then gradually shift production traffic to the new version. If any issues are detected, they want to immediately roll back to the previous version without redeploying. Which Azure App Service feature should the team use to meet these requirements?
FAQ
Questions learners often ask
What does this AZ-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: Elasticity — Elasticity is a key benefit of cloud computing that allows resources to automatically scale out (increase capacity) during periods of high demand and scale in (reduce capacity) when demand drops. This means the company only pays for the resources it consumes, eliminating the need to purchase and maintain idle hardware for peak loads. High availability focuses on uptime, disaster recovery on recovering from failures, and geo-redundancy on data replication across regions; none of these directly address the problem of handling variable traffic without idle capacity.
What should I do if I get this AZ-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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