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easymultiple choiceObjective-mapped

A user receives an encrypted email from their bank. They use their private key to decrypt the message. After reading it, they verify that the message content has not been altered during transit. Which security principle is primarily demonstrated by the verification that the content was not altered?

Question 1easymultiple choice
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A user receives an encrypted email from their bank. They use their private key to decrypt the message. After reading it, they verify that the message content has not been altered during transit. Which security principle is primarily demonstrated by the verification that the content was not altered?

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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

Confidentiality

Confidentiality ensures data is accessible only to authorized users; encryption provides this, but the verification of no alteration is about integrity.

B

Best answer

Integrity

Integrity ensures data has not been altered. Verifying that the message content remains unchanged directly demonstrates integrity.

C

Distractor review

Availability

Availability ensures data and systems are accessible when needed; the scenario does not relate to availability.

D

Distractor review

Non-repudiation

Non-repudiation prevents denial of actions (e.g., sending a message), but verifying content unchanged is about integrity, not non-repudiation.

Common exam trap

Common exam trap: ACLs stop at the first match

ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.

Technical deep dive

How to think about this question

ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.

KKey Concepts to Remember

  • Standard ACLs match source addresses.
  • Extended ACLs can match source, destination, protocol and ports.
  • The first matching ACL entry is used.
  • There is usually an implicit deny at the end.

TExam Day Tips

  • Check inbound versus outbound direction.
  • Read the ACL from top to bottom.
  • Look for a broader permit or deny above the intended line.

Related practice questions

Related SC-900 practice-question pages

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

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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 company must retain all customer contracts for 10 years to comply with industry regulations. After 10 years, the contracts must be permanently deleted. Which Microsoft Purview solution should be used to automate this process?

Question 2

A company uses a cloud-based SaaS (Software as a Service) application for customer relationship management. According to the shared responsibility model, which security responsibility is primarily handled by the customer?

Question 3

A company runs a mix of on-premises servers and Azure virtual machines. They deploy Microsoft Defender for Endpoint on all servers. The security team wants to create custom queries to hunt for a specific attack pattern that involves a sequence of events across multiple machines, such as a PowerShell script being downloaded and then executed on several servers. They need to write their own detection rules based on advanced hunting data. Which Microsoft 365 Defender capability should they use?

Question 4

A company runs a consumer-facing e-commerce website and wants to allow customers to sign in using their existing social media accounts such as Google, Facebook, or LinkedIn. Which Microsoft Entra ID solution should they implement?

Question 5

A company has a hybrid identity environment with Active Directory synchronizing to Microsoft Entra ID. They want users to be able to reset their own on-premises passwords via the cloud SSPR portal. What is the minimum license required for this capability?

Question 6

A company uses a cloud-based Customer Relationship Management (CRM) system that is delivered as Software-as-a-Service (SaaS). According to the shared responsibility model, which security responsibility is primarily handled by the customer?

FAQ

Questions learners often ask

What does this SC-900 question test?

Standard ACLs match source addresses.

What is the correct answer to this question?

The correct answer is: Integrity — Integrity ensures that data has not been modified by unauthorized parties. In this scenario, verifying that the message content was not altered directly upholds the principle of integrity. Confidentiality is about keeping data secret, which is provided by encryption, but the verification step focuses on integrity. Availability ensures data is accessible when needed, and non-repudiation prevents a sender from denying they sent the message, which is different from verifying content unchanged.

What should I do if I get this SC-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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