Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 45 discussion

A, C, D options are out, since Lambda is fully managed service which provides high availability and scalability by its own Answers are B and E

BE so that the lambda function reads the SQS queue and nothing gets lost

best solution is to decouple the applications using SQS queue.

Explicação: Criar uma fila do SQS e inscrevê-la no tópico do SNS (Opção B): Quando o tópico do SNS envia notificações, elas são colocadas na fila do SQS. Isso garante que as mensagens sejam armazenadas de forma durável na fila, mesmo que a função do Lambda não esteja disponível para processá-las imediatamente. Modificar a função do Lambda para ler da fila do SQS (Opção E): A função do Lambda é configurada para ser acionada por mensagens na fila do SQS. Se ocorrer um problema de conectividade ou falha na função, as mensagens permanecerão na fila do SQS até que sejam processadas com sucesso. Isso evita a perda de mensagens e elimina a necessidade de intervenção manual.

Enabling SQS with Lambda is the solution here as we need all data to be ingested in future.

B. Create an Amazon Simple Queue Service (Amazon SQS) queue, and subscribe it to the SNS topic: By adding an SQS queue between the SNS topic and the Lambda function, you decouple the notification and processing layers. Messages are stored reliably in the SQS queue, and they are not lost even if the Lambda function fails temporarily due to network connectivity or other issues. E. Modify the Lambda function to read from an Amazon Simple Queue Service (Amazon SQS) queue: Configuring the Lambda function to poll the SQS queue ensures that messages are processed asynchronously. If a processing failure occurs, the message remains in the queue and can be retried without manual intervention. This ensures all data is eventually processed.

B,E : SQS is a pull mechanism broker, with at least one delivery, so by using SQS no messages get lost.

Create an Amazon Simple Queue Service (Amazon SQS) queue, and subscribe it to the SNS topic: This will decouple the data ingestion process and ensure that messages are not lost if the Lambda function fails to process them immediately Modify the Lambda function to read from an Amazon Simple Queue Service (Amazon SQS) queue: This ensures that the Lambda function can process the messages from the SQS queue, providing a reliable way to handle data ingestion even if there are network issues.

BE for sure

BE is correct as SQS ensures the messages are stored in a queue for processing. A: No issue with Lambda availability so this solution is wrong C: No issues with CPU or memory so no value added by this step also D: This is not a provisioning issue so provisioning more Lambda won't solve the re-execution issues. The missed messages will still be lost

Since network timeout is the issue here, introduce SQS and read from it , that way when network goes down, data still remains in the queue and when connectivity is back, the lambda function can continue from the last data in the queue

the correct combination of actions to ensure that the Lambda function ingests all data in the future is to create an SQS queue and subscribe it to the SNS topic (option B) and modify the Lambda function to read from the SQS queue (option E).

Key: network connectivity issues

This one told you the answer in the answer choices. Just add the word THEN between B and E and there ya go.

B and E , the FAN out model , SQS will help to retrie the work and delayed processing

B) Create an Amazon Simple Queue Service (Amazon SQS) queue, and subscribe it to the SNS topic. E) Modify the Lambda function to read from an Amazon Simple Queue Service (Amazon SQS) queue.

BE is most logical answer.