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AWS Developer Associate Set 3
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Questions in this quiz (15)
1An Amazon EC2 instance requires permissions to read and write data in an Amazon S3 bucket. A Developer is creating an IAM
role that will be assumed by the EC2 instance.
When creating the role using the AWS CLI create-role command, which policy must be added to allow the instance to assume
the role?- ABucket policy
- BInline policy
- CTrust policy
- DManaged policy
2An application reads data from Amazon S3 and makes 55,000 read requests per second. A Developer must design the storage
solution to ensure the performance requirements are met cost-effectively.
How can the storage be optimized to meet these requirements?- ACreate at least 10 prefixes and split the files across the prefixes.
- BCreate at least 10 S3 buckets and split the files across the buckets.
- CMove the files to Amazon EFS. Index the files with S3 metadata.
- DMove the files to Amazon DynamoDB. Index the files with S3 metadata.
3An eCommerce application uses an Amazon RDS database with Amazon ElastiCache in front. Stock volume data is updated
dynamically in listings as sales are made. Customers have complained that occasionally the stock volume data is incorrect, and
they end up purchasing items that are out of stock. A Developer has checked the front end and indeed some items display the
incorrect stock count.
What could be causing this issue?- AThe Amazon RDS database is deployed as Multi-AZ and the standby is inconsistent.
- BThe Amazon RDS database has insufficient IOPS provisioned for its EBS volumes.
- CThe stock volume data is being retrieved using a write-through ElastiCache cluster.
- DThe cache is not being invalidated when the stock volume data is changed.
4A Developer is creating a database solution using an Amazon ElastiCache caching layer. The solution must provide strong
consistency to ensure that updates to product data are consistent between the backend database and the ElastiCache cache.
Low latency performance is required for all items in the database.
Which cache writing policy will satisfy these requirements?- AUse a lazy-loading caching strategy.
- BUse a write-through caching strategy.
- CAdd a short duration TTL value to each write.
- DInvalidate the cache for each database write.
5A Developer has created an Amazon Cognito user pool and configured a domain for it. The Developer wants to add sign-up and
sign-in pages to an app with a company logo.
What should the Developer do to meet these requirements?- ACustomize the Amazon Cognito hosted web UI and add the company logo.
- BCreate a REST API using Amazon API Gateway and add a Cognito authorizer. Upload the company logo to a stage in the API.
- CUpload the company logo to an Amazon S3 bucket. Specify the S3 object path in the app client settings in Amazon Cognito.
- DCreate a custom login page that includes the company logo and upload it to Amazon Cognito. Specify the login page in the app client settings.
6An AWS Lambda function has been connected to a VPC to access an application running a private subnet. The Lambda function also pulls data from an Internet-based service and is no longer able to connect to the Internet. How can this be rectified?
- AConnect the Lambda function to an Internet Gateway
- BAdd a NAT Gateway to a public subnet and specify a route in the private subnet
- CConnect an AWS VPN to Lambda to connect to the Internet
- DAdd an Elastic IP to the Lambda function
7A batch job runs every 24 hours and writes around 1 million items into a DynamoDB table each day. The batch job completes
quickly, and the items are processed within 2 hours and are no longer needed.
What’s the MOST efficient way to provide an empty table each day?- AUse the BatchUpdateItem API with expressions
- BIssue an AWS CLI aws dynamodb delete-item command with a wildcard
- CDelete the entire table and recreate it each day
- DUse the BatchWriteItem API with a DeleteRequest
8A development team is migrating data from various file shares to AWS from on-premises. The data will be migrated into a single
Amazon S3 bucket. What is the SIMPLEST method to ensure the data is encrypted at rest in the S3 bucket?- AUse SSL to transmit the data over the Internet
- BEnsure all requests use the x-amz-server-side-encryption-customer-key header
- CEnsure all requests use the x-amz-server-side-encryption header
- DEnable default encryption when creating the bucket
9A company needs to provide additional security for their APIs deployed on Amazon API Gateway. They would like to be able to
authenticate their customers with a token. What is the SAFEST way to do this?- ASetup usage plans and distribute API keys to the customers
- BCreate an Amazon Cognito identity pool
- CCreate an API Gateway Lambda authorizer
- DUse AWS Single Sign-on to authenticate the customers
10A developer is making updates to the code for a Lambda function. The developer is keen to test the code updates by directing a small amount of traffic to a new version. How can this BEST be achieved?
- ACreate two versions of the function code. Configure the application to direct a subset of requests to the new version
- BCreate an alias that points to both the new and previous versions of the function code and assign a weighting for sending a portion of traffic to the new version
- CCreate an API using API Gateway and use stage variables to point to different versions of the Lambda function
- DCreate a new function using the new code and update the application to split requests between the new functions
11A company runs a popular online game on premises. The application stores players’ results in an in-memory database. The application is being migrated to AWS and the company needs to ensure there is no reduction in performance.
Which database would be MOST suitable?- AAmazon RDS
- BAmazon ElastiCache
- CAmazon DynamoDB
- DAmazon Elastic Beanstalk
12An Amazon RDS database that stores product information for an online eCommerce marketplace is experiencing heavy demand. An increase in read requests is causing the database performance to be impacted and is affecting database writes.
What is the best way to offload the read traffic from the database with MINIMAL code changes and cost?- AChange the RDS database instance type to an instance with more CPU/RAM
- BCreate an RDS Multi AZ DB and modify the application to send read requests to the standby DB
- CCreate an ElastiCache Memcached cluster and modify the application to send read requests to the cluster
- DCreate an RDS Read Replica and modify the application to send read requests to the replica
13A developer has deployed a serverless application with AWS Lambda. The function must make remote calls to external endpoints.
Which configuration element in Lambda can be used store the connection strings related to the external endpoints?- AAliases
- BTags
- CEnvironment variables
- DVersions
14A developer is building a web application that will be hosted on Amazon EC2 instances. The EC2 instances will store configuration data in an Amazon S3 bucket. What is the SAFEST way to allow the EC2 instances to access the S3 bucket?
- AStore an access key and secret ID that has the necessary permissions on the EC2 instances
- BCreate an IAM Role with a customer-managed policy attached that has the necessary permissions and attach the role to the EC2 instances
- CCreate an IAM Role with an AWS managed policy attached that has the necessary permissions and attach the role to the EC2 instances
- DUse the AWS SDK and authenticate with a user account that has the necessary permissions on the EC2 instances
15An AWS Lambda functions downloads a 50MB from an object storage system each time it is invoked. The download delays the function completion and causes intermittent timeouts which is slowing down the application.
How can the application be refactored to resolve the timeout?- AIncrease the memory allocation of the function
- BIncrease the timeout of the function
- CIncrease the concurrency allocation of the function
- DStore the file in the /tmp directory of the execution context and reuse it on subsequent invocations
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- Ordenadores/Informática Quiz on AWS Developer Associate Set 3, created by fran contreras on 01/06/2022.
- Author
- fran contreras
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- English
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