A developer is using AWS CodePipeline with S3 as the artifact store. The developer is receiving an error that states, "The S3 object cannot be found." What is the MOST likely cause?

A developer is using AWS X-Ray to trace the performance of a Lambda function. However, X-Ray traces are not showing up in the Lambda execution logs. What is the MOST likely cause?

A developer enables versioning on an S3 bucket. Later, a user accidentally deletes an important file. What is the BEST way to restore the file?

You are using AWS Step Functions to invoke Lambda functions in a workflow. A task fails due to an occasional network issue. What is the MOST efficient way to automatically retry the task?

A developer is experiencing performance issues with a MySQL database on Amazon RDS. After reviewing the database logs, the developer notices that the issue is related to long-running queries. What is the best way to improve performance?

A developer configures a Lambda function with a Dead Letter Queue (DLQ) to handle failed invocations. What happens when the Lambda function fails to process an event after multiple retries?

A developer is deploying an application to EC2 instances using AWS CodeDeploy. The deployment fails with the error "ApplicationStop command returned an invalid exit code." What is the MOST likely cause?

A developer is troubleshooting an AWS Lambda function that is unable to access an S3 bucket. The Lambda function's execution role has the s3:GetObject permission for the bucket, but the function still cannot read from it. What is the MOST likely cause?

A developer needs to integrate Amazon SNS with Amazon SQS. When a message is published to an SNS topic, the corresponding SQS queue is not receiving the message. What is the MOST likely cause?

A developer is deploying resources using AWS CloudFormation. The stack deployment fails, and no clear error message is provided. Which AWS service should the developer use to debug the issue?

A developer created a global secondary index (GSI) on a DynamoDB table to query by emailAddress instead of userID. The developer notices that queries by emailAddress are consistently slower than expected. What is the MOST likely cause?

A developer is setting up an API Gateway to invoke a Lambda function with a custom authorizer. The Lambda function is invoked successfully, but authorization fails for some users. What could be the issue?

A developer is using Amazon SQS to queue messages for processing by an AWS Lambda function. The developer notices that after a message is processed, it’s not removed from the queue. What is the MOST likely cause?

A developer wants to securely store API keys in AWS Lambda and access them in the function code. The function needs to access these values without hardcoding them. What should the developer do?

A developer uses AWS Step Functions to orchestrate Lambda functions. One Lambda often fails due to transient issues. What's the MOST efficient way to handle this?

A developer uses AWS CodePipeline to deploy a Lambda function. However, the new code isn't reflected after a successful pipeline execution. What could be the reason?

You’re using Amazon API Gateway with a Lambda backend. Users report stale data being returned. Caching is enabled. What should you do to ensure fresh data is returned?

You configured an S3 bucket to trigger a Lambda function on PUT events. However, the function isn't executing. What is the MOST likely reason?

A developer created a policy to allow a Lambda function to publish to an SNS topic, but the function still fails with an "AccessDenied" error. Which is the MOST likely reason?

A developer is building a highly available web application that reads and writes data to an Amazon DynamoDB table. Occasionally, the app reads stale data right after a write. Which solution minimizes the stale reads?

A developer has deployed an AWS Lambda function that needs to access an RDS database within a private subnet of a VPC. The function throws a timeout error when trying to connect. What is the MOST likely cause?

A developer is creating an application to process a large number of requests. Requests must be processed in order, and each request should be processed
only once.
How should Amazon SQS be deployed to achieve this?

A developer is planning to use an Amazon API Gateway and AWS Lambda to provide a REST API. The developer will have three distinct
environments to manage: development, test, and production.
How should the application be deployed while minimizing the number of resources to manage?

A developer wants to ensure the Amazon EC2 instances in AWS Elastic Beanstalk execute a certain set of commands before the application is ready to
use. Which Elastic Beanstalk feature will allow the developer to accomplish this?

A developer is building a WebSocket API using Amazon API Gateway. The payload sent to this API is JSON that includes an action key. This key can
have three different values: create, update, and remove. The developer must integrate with different routes based on the value of the action key of the
incoming JSON payload.
How can the developer accomplish this task with the LEAST amount of configuration?

An application takes longer than expected to process an Amazon SQS message.
What should the developer do to the application so that other instances do not pick up the same message?

How can a developer use a debugger for AWS Lambda code that is deployed with AWS Serverless Application Model (AWS SAM)?

A company is developing a serverless ecommerce web application. The application needs to make coordinated, all-or-nothing changes to multiple items
in the company's inventory table in Amazon Dy

An application running on multiple Amazon EC2 instances pulls messages from a standard Amazon SQS queue. A requirement for the application is that all messages must be encrypted at rest.
Developers are instructed to use methods that allow for centralized key management and minimize possible support requirements whenever possible. Which of the following solutions supports these requirements?

An application contains two components: one component to handle HTTP requests, and another component to handle background processing tasks. Each
component must scale independently. The developer wants to deploy this application using AWS Elastic Beanstalk.
How should this application be deployed, based on these requirements?

A developer tested an application locally and then deployed it to AWS Lambda. While testing the application remotely, the Lambda function fails with
an access denied message.
How can this issue be addressed?

A development team uses AWS Elastic Beanstalk to deploy a Java-based web application. The team wants to ensure that the changes to the source code
and the configuration are always deployed on new instances. The team configures the Elastic Beanstalk environment to use immutable updates.
However, an error occurs the first time a change is deployed with the new update policy.
What is the MOST likely cause of this issue?

Which of the following statements about SQS is true?

If an application is storing hourly log files from thousands of instances from a high traffic web site, which naming scheme would give optimal performance on S3?

What type of block cipher does Amazon S3 offer forserver side encryption?

When a Developer tries to run an AWS CodeBuild project, it raises an error because the length of all environment variables exceeds the limit for the combined maximum of characters.
What is the recommended solution?

A company is providing services to many downstream consumers. Each consumer may connect to one or more services. This has resulted in a complex architecture that is difficult to manage and does not scale well. The company needs a single interface to manage these services to consumers.
Which AWS service should be used to refactor this architecture?

A developer is writing an AWS Lambda function. The developer wants to log key events that occur during the Lambda function and include a unique identifier to associate the events with a specific function invocation.
Which of the following will help the developer accomplish this objective?

A developer creates a customer managed key for multiple AWS users to encrypt data in Amazon S3. The developer configures Amazon Simple Notification
Service (Amazon SNS) to publish a message if key deletion is scheduled. The developer needs to preserve any SNS messages that cannot be delivered so that those messages can be reprocessed.
Which AWS service or feature should the developer use to meet this requirement?

A company has point-of-sale devices across thousands of retail shops that synchronize sales transactions with a centralized system. The system includes an
Amazon API Gateway API that exposes an AWS Lambda function. The Lambda function processes the transactions and stores the transactions in Amazon RDS for MySQL. The number of transactions increases rapidly during the day and is near zero at night.
How can a developer increase the elasticity of the system MOST cost-effectively?

A company that has multiple offices uses an Amazon DynamoDB table to store employee payroll information. Item attributes consist of employee names, office identifiers, and cumulative daily hours worked The most frequently used query extracts a report of an alphabetical subset of employees for a specific office.
Which design of the DynamoDB table primary key will have the MINIMUM performance impact?

A developer has created a Java application that makes HTTP requests directly to AWS services. Application logging shows 5xx HTTP response codes that occur at irregular intervals. The errors are affecting users.
How should the developer update the application to improve the application's resiliency?

A developer is building an application that runs behind an Application Load Balancer (ALB). The ALB is configured as the origin for an Amazon CloudFront distribution. Users will log in to the application by using their social media accounts.
How can the developer authenticate users?

A company experienced partial downtime during the last deployment of a new application. AWS Elastic Beanstalk split the environment's Amazon EC2 instances into batches and deployed a new version one batch at a time after taking them out of service. Therefore, full capacity was not maintained during deployment.
The developer plans to release a new version of the application, and is looking for a policy that will maintain full capacity and minimize the impact of the failed deployment.
Which deployment policy should the developer use?

A developer needs to use Amazon DynamoDB to store customer orders. The developer's company requires all customer data to be encrypted at rest with a key that the company generates.
What should the developer do to meet these requirements?

A development team has been using a builder server that is hosted on an Amazon EC2 instance to perform builds and deployments for the last 3 months. The
EC2 instance's instance profile uses an IAM role that contains the Administrator Access managed policy. The development team must replace that policy with a policy that provides only the required permissions.
What is the FASTEST way to create a custom 1AM policy for the EC2 instance to meet this requirement?

A developer is implementing user authentication and authorization for a web application that is hosted on an Amazon EC2 instance. The developer needs to ensure that the user credentials are encrypted and secure when they are stored and transmitted.
Which solution will meet these requirements?

A developer needs to deploy an application to AWS Elastic Beanstalk for a company. The application consists of a single Docker image. The company's automated continuous integration and continuous delivery (CI/CD) process builds the Docker image and pushes the image to a public Docker registry.
How should the developer deploy the application to Elastic Beanstalk?

A company has an application that analyzes photographs. A developer is preparing the application for deployment to Amazon EC2 instances. The application's image analysis functions require a mix of GPU instances and CPU instances that run on Amazon Linux. The developer needs to add code to the application so that the functions can determine whether they are running on a GPU instance.
What should the functions do to obtain this information?

A developer is testing an AWS Lambda function by using the AWS Serverless Application Model (AWS SAM) local CLI. The application that is implemented by the
Lambda function makes several AWS API calls by using the AWS software development kit (SDK). The developer wants to allow the function to make AWS API calls in a test AWS account from the developer's laptop.
What should the developer do to meet these requirements?

A gaming website gives users the ability to trade game items with each other on the platform. The platform requires both users' records to be updated and persisted in one transaction. If any update fails, the transaction must roll back.
Which AWS solution can provide the transactional capability that is required for this feature?

A developer needs to write an AWS CloudFormation template on a local machine and deploy a CloudFormation stack to AWS.
What must the developer do to complete these tasks?

A company is adding items to an Amazon DynamoDB table from an AWS Lambda function that is written in Python. A developer needs to implement a solution that inserts records in the DynamoDB table and performs automatic retry when the insert fails.
Which solution meets these requirements with MINIMUM code changes?

A Development team decides to adopt a continuous integration/continuous delivery (CI/CD) process using AWS CodePipeline and AWS CodeCommit for a new application. However, management wants a person to review and approve the code before it is deployed to production.
How can the Development team add a manual approver to the CI/CD pipeline?

A company is using AWS CodeDeploy for all production deployments. A developer has an Amazon Elastic Container Service (Amazon ECS) application that uses the CodeDeployDefault.ECSAIIAtOnce configuration. The developer needs to update the production environment in increments of 10% until the entire production environment is updated.
Which CodeDeploy configuration should the developer use to meet these requirements?

A developer is writing an AWS Lambda function. The Lambda function needs to access items that are stored in an Amazon DynamoDB table.
What is the MOST secure way to configure this access for the Lambda function?

A company hosts a microservices application that uses Amazon API Gateway. AWS Lambda, Amazon Simple Queue Service (Amazon SQS), and Amazon
DynamoDB. One of the Lambda functions adds messages to an SQS FIFO queue.
When a developer checks the application logs, the developer finds a few duplicated items in a DynamoDB table. The items were inserted by another polling function that processes messages from the queue.
What is the MOST likely cause of this issue?

A global company has a mobile app with static data stored in an Amazon S3 bucket in the us-east-1 Region. The company serves the content through an Amazon
CloudFront distribution. The company is launching the mobile app in South Africa. The data must reside in the af-south-1 Region. The company does not want to deploy a specific mobile client for South Africa.
What should the company do to meet these requirements?

A developer is configuring an Amazon CloudFront distribution for a new application to provide encryption in transit. The application is running in the eu-west-1
Region. The developer creates a new certificate in AWS Certificate Manager (ACM) in eu-west-1, but the certificate is not visible in the CloudFront distribution settings.
What should the developer do to fix this problem?

A company has an application that uses Amazon Cognito user pools as an identity provider. The company must secure access to user records. The company has set up multi-factor authentication (MFA). The company also wants to send a login activity notification by email every time a user logs in.
What is the MOST operationally efficient solution that meets this requirement?