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NEW QUESTION # 46
A company is running a new workload across accounts that are in an organization in AWS Organizations. All running resources must have a tag ofCostCenter, and the tag must have one of three approved values. The company must enforce this policy and must prevent any changes of the CostCenter tag to a non-approved value.
Which solution will meet these requirements?
Answer: C
Explanation:
Toenforcerequired tagging and approved values at scale, the strongest guardrail is anSCPbecause SCPs can prevent API calls across accounts/OUs before resources are created or tags are changed. By using the aws:
RequestTag/CostCenter condition key and checking that the value is one of the approved values, an SCP candeny Create (and TagResource/UntagResource where supported)* when the request attempts to set a non- approved value. This prevents "bad" CostCenter values from being introduced.
AWS Config (including custom policy rules with CloudFormation Guard) is excellent fordetectingnoncompliance and reporting, but on its own it is not a hard preventative control. Pairing Config rule evaluation with an SCP guardrail gives both visibility and prevention. Option A is the only option that explicitly combines an enforceable preventive control (SCP deny based on aws:RequestTag/CostCenter) with compliance evaluation logic.
Option B cannot "block creation" reliably because EventBridge/Lambda isafter-the-fact; by the time the function runs, the resource is already created. Option C relies on tag policies enforcement semantics; tag policies primarilystandardize and reporttag usage, and the provided SCP in C only checks for null/missing values, not for non-approved values or for preventing later changes. Option D is also reactive and not a guaranteed preventative control.
NEW QUESTION # 47
A company in France uses Amazon Cognito with the Cognito Hosted UI as an identity broker for sign-in and sign-up processes. The company is marketing an application and expects that all the application ' s users will come from France. When the company launches the application, the company ' s security team observes fraudulent sign-ups for the application. Most of the fraudulent registrations are from users outside of France.
The security team needs a solution to perform custom validation at sign-up. Based on the results of the validation, the solution must accept or deny the registration request.
Which combination of steps will meet these requirements? (Select TWO.)
Answer: D,E
Explanation:
To performcustom validation at sign-upand explicitlyaccept or denyregistrations, Amazon Cognito providesLambda triggers. APre sign-up triggerruns synchronously during the sign-up flow (including the Hosted UI) and can implement custom checks (for example, IP reputation checks, email/domain validation, velocity checks, allow/deny lists, or geo checks using an external service). Based on the trigger logic, the function can allow the sign-up to proceed or reject it, meeting the "custom validation" and "accept/deny" requirement directly.
Because the observed fraud largely originatesoutside France, adding a front-door geographic control reduces unwanted traffic before it reaches Cognito.AWS WAFsupportsGeo matchconditions in a web ACL to allow
/deny requests by country, which is a common mitigation for region-scoped applications. Associating a WAF web ACL to protect the Hosted UI endpoint helps block sign-up requests from non-French locations early, reducing fraud attempts and load.
The other options do not meet the requirement: Cognito user pools do not provide a native "geographic restriction setting" for sign-up (D), app client ID validation does not stop fraudulent sign-ups (C), and using a social IdP does not provide custom accept/deny validation for all sign-ups (E).
NEW QUESTION # 48
A security engineer must investigate an Amazon GuardDuty finding. The finding indicates potential cryptocurrency mining activity on an Amazon EC2 instance. The security engineer must validate the finding and assess the impact.
Which data sources should the security engineer analyze to meet these requirements?
Answer: A
Explanation:
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
Cryptocurrency mining validation requires evidence of actual mining behavior, not only metadata about the finding. Process details show whether mining binaries or suspicious processes are running on the instance.
DNS analysis can reveal lookups to known mining pools or suspicious domains. VPC Flow Logs help confirm outbound connections, destinations, ports, and traffic volume from the instance. GuardDuty uses foundational data sources such as DNS logs, VPC Flow Logs, and CloudTrail events to detect suspicious activity, so those same sources are appropriate for validating and scoping the finding. CPU metrics alone are useful context but not enough. Counting findings or checking severity does not prove impact. Session history and Route 53 records do not directly validate mining behavior.
NEW QUESTION # 49
A company has an organization in AWS Organizations. The organization consists of multiple OUs. The company must prevent IAM principals from outside the organization from accessing the organization's Amazon S3 buckets. The solution must not affect the existing access that the OUs have to the S3 buckets. Which solution will meet these requirements?
Answer: D
Explanation:
By using an SCP with the aws:ResourceOrgID and aws:PrincipalOrgID condition, you ensure that only IAM principals from within the same AWS Organization can access the S3 buckets. This SCP restricts access from any IAM principals outside the organization while allowing access within the organization. This approach meets the requirement without affecting existing permissions within the OUs.
NEW QUESTION # 50
A company allows users to download its mobile app onto their phones. The app is MQTT based and connects to AWS IoT Core to subscribe to specific client-related topics. Recently, the company discovered that some malicious attackers have been trying to get a Trojan horse onto legitimate mobile phones. The Trojan horse poses as the authentic application and uses a client ID with injected special characters to gain access to topics outside the client's privilege scope.
Which combination of actions should the company take to prevent this threat? (Choose two.)
Answer: C,D
Explanation:
The threat is client ID manipulation to break authorization boundaries. The strongest control is tobind the MQTT client identity to the authenticated device identity(the Thing) rather than trusting arbitrary client IDs provided by the client. Using theThing name as the client ID(Option A) removes ambiguity and makes the identifier predictable and tied to a registered identity.
On the authorization side, AWS IoT Core policies can use policy variables. Allowing iot:Connect only when the resource matches client/${iot:Connection.Thing.ThingName} (Option E) ensures the connection is permittedonlyif the client ID exactly equals the authenticated Thing name from the TLS certificate/Thing principal context. This prevents attackers from injecting special characters or choosing a different client ID to escalate access, because the policy evaluation ties the allowed client resource to the Thing identity, not the attacker-controlled string.
NEW QUESTION # 51
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