A company is creating an application that will require users to access AWS services and allow them to reset their own passwords.
Which of the following would allow the company to manage users and authorization while allowing users to reset their own passwords?

• A.Amazon Cognito identify pools and AWS STS
• B.Amazon Cognito identity pools and AWS IAM
• C.Amazon Cognito user pools and AWS KMS
• D.Amazon Cognito user pools and identity pools

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A Developer is creating a serverless website with content that includes HTML files, images, videos, and JavaScript (client-side scripts).
Which combination of services should the Developer use to create the website?

• A.Amazon S3 and Amazon CloudFront
• B.Amazon EC2 and Amazon ElastiCache
• C.Amazon ECS and Redis
• D.AWS Lambda and Amazon API Gateway

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A company's ecommerce website is experiencing massive traffic spikes, which are causing performance problems in the company database. Users are reporting that accessing the website takes a long time
A developer wants to implement a caching layer using Amazon ElastiCache. The website is required to be responsive no matter which product a user views, and the updates to product information and prices must be strongly consistent

• A.Write to the backend first and invalidate the cache
• B.Write to the cache and the backend at the same time
• C.Write to the backend first and wait for the cache to expire.
• D.Which cache writing policy will satisfy these requirements?
• E.Write to the cache directly and sync the backend at a later time.

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A developer is designing a distributed application built using a microservices architect spanning multiple AWS accounts. The company's operations team wants to analyze and debug application issues from a centralized account.
How can the developer meet these requirements?

• A.Use VPC Flow Logs to collect application logs across different accounts.
• B.Use an Amazon X-Ray agent with role assumption on to publish data into the centralized account.
• C.Enable AWS CloudTrail to publish the trails in an Amazon S3 bucket in the centralized account.
• D.Use Amazon X-Ray and create a new IAM user to publish the access keys into the centralized account.

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An application displays a status dashboard. The status is updated by 1 KB messages from an SQS queue. Although the status changes infrequently, the Developer must minimize the time between the message arrival in the queue and the dashboard update.
What technique provides the shortest delay in updating the dashboard?

• A.Retrieve the messages from the queue using long polling every 20 seconds.
• B.Reduce the size of the messages by compressing them before sending.
• C.Retrieve the messages from the queue using short polling every 10 seconds.
• D.Reduce the size of each message payload by sending it in two parts.

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