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AWS (Fach) / Certified Developer (Lektion)

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• Can you run SQL Queries on DynamoDB? No, it's a NoSQL database
• Which protocol policy defines the protocols that can be used to access CloudFront content? viewer protocol policy
• When using step functions, do you have to use synchronous or asynchronous step functions when wanting to run tasks in parallel? You can use both
• When using CloudFormation, which CLI command deploys a stack specified in a template? create-stack
• In CodePipeline, how can you perform a security check on the image before deployment? create a test stage with a test action
• What can you do when Kinsesis throws ProvisionedThroughputExceededExceptions? - reshard - reduce number of requests
• What's the item limit of a BatchGetItem operation? 100 items
• Can you run parallel scans on DynamoDB? yes
• You encrypted data using an encrypted data key. Should you store the data with the key? yes
• Can CodeDeploy deploy to s3 no
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• What is the name of the SAM template property that defines the point in a Lambda function's code where execution begins? Handler
• Which data types are allowed in DynamoDB sort keys? - string - number - binary
• What is AWS Simple Workflow Service used for? Coordinate distributed application
• What is a different name for EventBridge? CloudWatch Events
• A developer is making changes to the CloudFormation template used to deploy an application. They would like to know if any existing resources will be deleted or replaced before applying the template updates. What service feature will enable this? CloudFormation change sets
• What's the cloud formation registry? artifact storage
• How should you simulate an Mutli-AZ-RDS AZ failure in AWS? reboot with forced failover
• How should you simulate an Mutli-AZ-RDS AZ failure in AWS? RDS reboot with forced failover
• What's the difference between filter-expression and projection-expression in DynamoDB? Filter Expression: Discriminates items based upon a value (SQL: Where) Projection Expression: Determines which values are returned (SQL: SELECT XXX)
• Which DynamoDB API call should be used to completly replace an existing record? PutItem
• Which DynamoDB API call should be used to edit the attributes of an existing item? UpdateItem
• To which SQL expression is DynamoDB filter-expression comparable? WHERE
• To which SQL expression is DynamoDB projection-expression comparable? SELECT xxx, xxx, xxx
• Which file does CodeDeploy use to specify and manage deployments? AppSpec
• Which file does CodeBuild use for build commands and settings? Buildspec
• When using CodeBuild, name two places where credentials could be specified. - CodeBuild environment variables - Buildspec file
• How to prevent a CloudFormation Stack to be accidentally deleted? Enable stack termination protection
• What does Status=start_failed indicate? - resouce limit - instance limit
• What's the default maximum number of EC2 instances? 20
• How to refer to a stage variable in Lambda? ${stageVariable.stageVariableName}.
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• Which service should be used when a password needs to be rotated? Secrets Manager
• Which type of credentials does AWS SDK need? acces key ID secret access key
• How is session state managed in ElastiCache sticky sessions? Cookies
• When using a Read replica, could you be reading stale data? yes
• What does the ElastiCache write through strategy do? Updates the cache on every write operation
• When using DynamoDB, which parameter determines the number of items returned in a scan operation? scan limit
• How can Lambda reuse an existing database connection? connection is established outside the handler mehtod
• Can Lambda functions be invoked from S3 events? yes
• Is Logging per default enabled or disabled in Lambda? Enabled
• In Step functions, how is the timeout property called? HeartBeatSeconds
• How is the visual representation of your service landscape called in X-Ray? Service Map
• Can you import APIs into AWS? Yes, by using OpenApi definitions
• What are the two external storage options with Lambda? S3 and EFS
• Which service has stages? API Gateway
• Which service can help protect your API Gateway? AWS WAF (Web Application Firewall)
• Which service uses the AppSpec file? CodeDeploy

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