You are using Amazon Cognito identity pools to assign authenticated SAML users temporary access for downloading data fromAmazon S3 buckets.
For this, you have created multiple rules for each role that gets assigned to users.
Which of the following criteria is matched for evaluating these rules?
Click on the arrows to vote for the correct answer
A. B. C. D.Correct Answer - D.
When multiple rules are assigned, rules are evaluated in a sequential order & the IAM role for the first matching rule is used unless a‘CustomRoleArn”attribute is added to modify this sequence.
Option B is incorrect as a standard attribute does not alter rule evaluation.
Option A & C are incorrect as for each rule there is no preference value.
For more information on Role-Based Access Control for AWS Cognito, refer to the following URL-
https://docs.aws.amazon.com/cognito/latest/developerguide/role-based-access-control.htmlAmazon Cognito identity pools provide temporary AWS credentials to users who authenticate with SAML (Security Assertion Markup Language) identity providers. These credentials are used to access AWS resources, such as S3 buckets, for a limited time.
To assign roles to authenticated SAML users, you can create rules within your Cognito identity pool. These rules evaluate user attributes provided by the SAML identity provider to determine which role to assign to the user. Each rule has a set of conditions that must be met for it to apply.
Now, let's look at the criteria that are matched for evaluating these rules:
A. Rules are evaluated in sequential order & rule with lower value is preferred.
This statement means that Cognito evaluates the rules in the order they are defined, from top to bottom. The rule with the lowest order value is evaluated first. If the conditions of this rule are met, the corresponding role is assigned to the user, and the evaluation stops. If the conditions of the first rule are not met, the evaluation continues with the next rule. This continues until a rule is matched or all rules are evaluated.
B. Rules are evaluated in sequential order & IAM role for first matching rule is used, unless a standard attribute is specified to override the order.
This statement is also correct, but it adds an important detail. Cognito evaluates the rules in the order they are defined, from top to bottom. The first rule that matches the user's attributes is used to assign an IAM role. However, if a standard attribute is specified to override the order, then the specified attribute is used instead.
C. Rules are evaluated in sequential order & rule with higher value is preferred.
This statement is incorrect. It contradicts statement A, which correctly states that the rule with the lowest value is preferred.
D. Rules are evaluated in sequential order & IAM role for first matching rule is used, unless a ‘CustomRoleArn” is specified to override the order.
This statement is incorrect. It is similar to statement B, but it specifies a non-existent attribute. There is no "CustomRoleArn" attribute that can be used to override the order of rule evaluation.
In summary, the correct answer is B: Rules are evaluated in sequential order & IAM role for first matching rule is used, unless a standard attribute is specified to override the order.