MS-900 Describe Microsoft 365 apps and services Practice Question
This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. 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 department head wants to publish company-wide announcements and host Q&A sessions that allow employees to upvote questions. Which Microsoft 365 service is designed for this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Yammer
Yammer is the correct answer because it is Microsoft's enterprise social networking service specifically designed for company-wide communications, such as announcements and Q&A sessions. It includes features like threaded discussions, polls, and the ability for employees to upvote questions, making it ideal for fostering open dialogue across an organization.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Microsoft Teams
Why it's wrong here
Teams is for collaboration and chat, but not specifically designed for company-wide announcements and Q&A with upvoting.
✗
SharePoint
Why it's wrong here
SharePoint can host announcements but lacks built-in Q&A and voting features.
✓
Yammer
Why this is correct
Yammer provides a corporate social network where users can post announcements, ask questions, and upvote answers.
Related concept
Read the scenario before looking for a memorised answer.
✗
Outlook
Why it's wrong here
Outlook is an email client and not designed for such interactive posting.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Teams' 'Q&A' app or SharePoint's 'Q&A' web part with Yammer's native upvoting capability, but Teams and SharePoint lack the enterprise-wide social networking and upvoting features that Yammer provides for company-wide engagement.
Detailed technical explanation
How to think about this question
Yammer uses a graph-based social network model where posts and replies are organized in threads, and the upvote feature leverages a simple like/upvote count to surface popular content. Under the hood, Yammer integrates with Microsoft 365 via Azure Active Directory for identity and uses the Office Graph to surface trending conversations, enabling enterprise-wide discovery. In a real-world scenario, a department head can create a 'Company-Wide Announcements' group in Yammer, pin a post for Q&A, and employees can upvote questions to prioritize executive responses.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Yammer — Yammer is the correct answer because it is Microsoft's enterprise social networking service specifically designed for company-wide communications, such as announcements and Q&A sessions. It includes features like threaded discussions, polls, and the ability for employees to upvote questions, making it ideal for fostering open dialogue across an organization.
What should I do if I get this MS-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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