A Developer Has Built an Application Using Amazon Cognito for Authentication

question 74

Multiple Choice

A developer has built an application using Amazon Cognito for authentication and authorization. After a user is successfully logged in to the application, the application creates a user record in an Amazon DynamoDB table. What is the correct flow to authenticate the user and create a record in the DynamoDB table?

• A) Authenticate and get a token from an Amazon Cognito user pool. Use the token to access DynamoDB.
• B) Authenticate and get a token from an Amazon Cognito identity pool. Use the token to access DynamoDB.
• C) Authenticate and get a token from an Amazon Cognito user pool. Exchange the token for AWS credentials with an Amazon Cognito identity pool. Use the credentials to access DynamoDB.
• D) Authenticate and get a token from an Amazon Cognito identity pool. Exchange the token for AWS credentials with an Amazon Cognito user pool. Use the credentials to access DynamoDB.

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Definitions:

Two-tailed Test

A two-tailed test is a statistical test in which the area of interest is in both tails of the probability distribution, allowing for the testing of both directions of an effect.

Null Hypothesis

A default hypothesis that there is no significant difference or effect, typically tested against an alternative hypothesis in statistical analysis.

Equality

The state or quality of being equal, especially in status, rights, and opportunities.

Population Variances

A measure of the dispersion of a set of data points in a population data set.