20+ practice questions focused on Describe the concepts of security, compliance, and identity — one of the most tested topics on the Microsoft Security, Compliance, and Identity Fundamentals SC-900 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Describe the concepts of security, compliance, and identity PracticeA security architect is designing a new security posture based on the Zero Trust model. The architect wants to ensure that every access request is fully authenticated, authorized, and encrypted before granting access, and that access is granted only to the minimum necessary resources. Which three principles of Zero Trust align with these requirements? (Choose three.)
Explanation: The 'Verify explicitly' principle requires that every access request is fully authenticated, authorized, and encrypted before granting access, using all available data points. The 'Least privilege access' principle ensures that access is granted only to the minimum necessary resources, for the minimum necessary time. The 'Assume breach' principle underpins the entire model, driving the need for continuous verification and least privilege by designing security with the expectation that a breach is inevitable, thus minimizing its potential impact and blast radius.
A company subscribes to Microsoft 365 E5, a Software-as-a-Service (SaaS) offering. The IT department is responsible for configuring user accounts and managing data in Exchange Online and SharePoint Online. According to the shared responsibility model, which security responsibility is retained by Microsoft for this SaaS deployment?
Explanation: In a SaaS model like Microsoft 365 E5, Microsoft retains responsibility for securing the underlying application code, platform, and physical infrastructure. This includes patching the operating system, hardening the application stack, ensuring the runtime environment is secure, and maintaining tenant isolation to protect data from unauthorized access by other tenants. The customer is responsible for managing user identities, configuring access controls, and protecting their own data.
A hotel uses a key card system. Guests insert their card into the door lock, which reads the card's ID number. The system checks the ID number against a list of authorized rooms. If the ID matches an authorized room, the door unlocks. In this scenario, which concept is demonstrated when the system checks the ID number against the list of authorized rooms?
Explanation: The system checks the ID number against a list of authorized rooms to determine what action (unlocking the door) the guest is allowed to perform. This is the definition of authorization: granting or denying access rights based on verified identity. Authentication (proving who you are) has already occurred when the card was issued or when the system reads the ID; the check against the list is purely about permissions.
A company requires users to enter a password and then a temporary code from a mobile app to sign in. After signing in, a user attempts to open a confidential document but is denied because they are not a member of the 'Managers' group. Which two security concepts are primarily demonstrated in this scenario?
Explanation: The scenario demonstrates two security concepts: Authentication and Authorization. The user enters a password and a temporary code from a mobile app to sign in – this is multi-factor authentication (something you know and something you have), verifying the user's identity. After signing in, the attempt to open a confidential document is denied because the user is not a member of the 'Managers' group – this is authorization, controlling access based on group membership. Identification (claiming an identity) is not demonstrated because the scenario does not mention entering a username or similar identifier. Non-repudiation is not demonstrated because there is no evidence that the authentication method provides proof that cannot be denied; the temporary code is simply a second factor for authentication, not a non-repudiation mechanism.
A security architect is designing a Zero Trust security model for a hybrid organization. Which principle of Zero Trust requires that every access request must be fully authenticated and authorized regardless of the network location, and that access should be granted with the minimum level required?
Explanation: The explanation incorrectly states that 'Verify explicitly' requires access to be granted with the minimum level required. This aspect is a core tenet of the 'Use least privileged access' principle. The explanation even acknowledges this by stating it's 'further enforced by the 'Use least privileged access' principle,' which contradicts the idea that 'Verify explicitly' alone covers this requirement.
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