This MS-900 practice question tests your understanding of describe cloud concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: high availability ensures continuous service uptime.. 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 tenant administrator is advising a department that wants to keep services available during a hardware failure. Cloud concept or benefit best matches this requirement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Microsoft Planner
Why wrong: Planner manages tasks and does not describe this cloud model or benefit.
Data Loss Prevention (DLP)
Why wrong: DLP protects sensitive information from inappropriate sharing, not this cloud concept.
High availability
High availability focuses on keeping services accessible despite component failure.
Sensitivity labels
Why wrong: Sensitivity labels classify and protect content, not this cloud concept.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
High availability
High availability (C) is the correct answer because it directly addresses the requirement to keep services available during a hardware failure. High availability refers to a system's ability to remain operational and accessible despite component failures, typically achieved through redundancy, failover clustering, and load balancing. In Microsoft 365, this is implemented via redundant infrastructure across multiple datacenters and automatic failover mechanisms, ensuring service continuity without manual intervention.
Key principle: High availability ensures continuous service uptime.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Microsoft Planner
Why it's wrong here
Planner manages tasks and does not describe this cloud model or benefit.
Data Loss Prevention (DLP)
Why it's wrong here
DLP protects sensitive information from inappropriate sharing, not this cloud concept.
High availability
Why this is correct
High availability focuses on keeping services accessible despite component failure.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
High availability ensures continuous service uptime.
Sensitivity labels
Why it's wrong here
Sensitivity labels classify and protect content, not this cloud concept.
Common exam traps
The trap here is that candidates confuse high availability with disaster recovery or data protection features like DLP, but high availability specifically focuses on minimizing downtime during failures, not on preventing data loss or classifying data.
Detailed technical explanation
High availability in Microsoft 365 relies on geo-redundant datacenters with automatic failover, using technologies like Azure Traffic Manager and SQL Server Always On Availability Groups. For example, Exchange Online replicates mailbox databases across multiple datacenters, and if a primary datacenter fails, traffic is automatically redirected to a secondary site with zero data loss and minimal downtime. This is governed by a Service Level Agreement (SLA) of 99.9% uptime for core services, backed by financial credits if breached.
Key takeaway
High availability ensures continuous service uptime.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Review high availability ensures continuous service uptime., then practise related MS-900 questions on the same topic to reinforce the concept.
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FAQ
Describe cloud concepts — This question tests Describe cloud concepts — High availability ensures continuous service uptime..
The correct answer is: High availability — High availability (C) is the correct answer because it directly addresses the requirement to keep services available during a hardware failure. High availability refers to a system's ability to remain operational and accessible despite component failures, typically achieved through redundancy, failover clustering, and load balancing. In Microsoft 365, this is implemented via redundant infrastructure across multiple datacenters and automatic failover mechanisms, ensuring service continuity without manual intervention.
Review high availability ensures continuous service uptime., then practise related MS-900 questions on the same topic to reinforce the concept.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
High availability ensures continuous service uptime.
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Last reviewed: Jun 11, 2026
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