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AWS (Fach) / Certified Developer (Lektion)

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• When would you use a database outside of Elastic Beanstalk? in prod environment, because then you can tear down the app w/o impacting the database
• Which tool can help migrate a .NET application to Elastic Beanstalk? Windows Web Application Migration Assitant for Elastic Beanstalk
• What is the maximum visibility timeout of an SQS message in a queue? 12h
• What is more efficient, long or short polling? Long polling
• what's the AWS equivalent of GitHub? CodeCommit
• What can AWS CodeBuild do? - compile source code - run tests - produce packages
• What can AWS CodeDeploy do? Automate code deployment
• Name a common AWS toolstack for CI/CD Code pipeline managing - CodeCommit - CodeBuild - CodeDeploy
• What are the two CodeDeploy Deployment Approaches? - In-Place - Blue/Green
• In a CodeDeploy Deployment, where must the appspec.yml be placed? In the directory root
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• What is the name of the central code deploy configruation file? appspec.yml/json
• What is CodePipeline? Fully managed CI/CD service
• What is AWS CodeArtifact? Library Repository
• What can be stored in CodeArtifact? - Documentation - compiled applications - deployable packages - libraries
• You want to use an existing open source library in CodeArtifact, how do you do this? Use an external connection
• To which OSS is CloudFormation comparable? Docker compose
• You want to provision serverless applications using CloudFormation, what do you use? SAM, Serverless application model
• How can you avoid repeating yourself in CloudFormation By using nested stacks
• You don't want to learn the CloudFormation Template Syntax, but are comfortable with common programming languages. What can you do? Use Cloud Development Kit to transpile code the CloudFormation Template
• What is Amplify Hosting? - web hosting service
• Which AWS service is associated with Continous Integration? CodeCommit
• Which AWS services are associated with Continous Delivery? - CodeBuild - CodeDeploy
• Which AWS service is associated with Continous Deployment? - Code pipeline
• Part of your CloudFormation deployment fails due to a misconfiguration, by default what will happen? CloudFormation will rollback the entire stack
• In the CodeDeploy AppSpec file, what are hooks used for? To specify code, scripts or functions that you want to run at set points in the deployment lifecycle 
• What is the AWS service for identity federation? Cognito
• Which service can you use to provide social sign in for your applications? Cognito User Pools
• Which service can you use to provide temporary access to AWS services? Cognito Identity pools
• Which types of policy exist in IAM? - AWS managed - customer managed - inline
• What's the characteristic of an IAM inline policy? 1:1 relationship with user or group will be deleted if entity is deleted
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• Name two services with which users can assume AWS roles by logging in with an identity provider like Facebook or Google - Cognito - STS AssumeRoleWithWebIdentity
• How can you allow a user from one AWS account to access and manage resources in another AWS account? Configure cross-account access
• Which metrics are monitored by CloudWatch per default? - CPU utilization - network - disk
• How can you achieve OS-level metrics monitoring on CloudWatch? Install the CloudWatch agent and pay up
• You want to be notified when a certain metric reaches a threshold. How? CloudWatch Alarms
• What can a CloudWatch dimension be used for? Filter data
• What does CloudTrail monitor? AWS user activity, e.g. creating or changing services
• What's the difference between CloudTrail and CloudWatch? Cloudtrail audits user activity CloudWatch monitors AWS services
• What are CloudWatch Actions used for? publish monitor alert
• Which CloudWatch Command do you use when publishing data to CloudWatch? PutMetricData
• Which CloudWatch command do you use when creating an alarm? CloudWatchPutAlarm
• Which AWS service can you use in an event-driven architecture= EventBridge
• What's the difference between EventBridge and CloudWatch Events? EventBridge has more featues, but both use the same underlying technology
• Which AWS service can you use when you want to trigger events based on a schedule? EventBridge
• When making a BatchGetItems call to DynamoDB, name 3 Exceptions that you could commonly encounter - ValidationException - UnprocessedKeys - ProviosionedThroughputExceededException
• What the cause and the solution for a ValidationException after a BatchGetItems call to DynamoDB? cause: too many items requested solution: request...fewer items
• What's the cause and solution of the UnprocessedKeys Exception with DynamoDB? cause: some items not processed solution: reduce request size
• What is the cause of an UnprocessedItems Exception when using BatchWriteItems with DynamoDB? - some of the write operations failed
• Your application sends application logs to CloudWatch, and your team would like the ability to query the logs when troubleshooting application failures. Which service will enable the team to query the logs? CloudWatch Log insights
• Which service can you use to identify personable identifiable information (PII) Macie

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