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DVA-C01 Exam Dumps - AWS Certified Developer Associate Exam

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Question # 9

An application is using Amazon DynamoDB as its data store, and should be able to read 100 items per second as strongly consistent reads. Each item is 5 KB in size.

To what value should the table’s provisioned read throughput be set?

A.

50 read capacity units

B.

100 read capacity units

C.

200 read capacity units

D.

500 read capacity unitsc

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Question # 10

A developer has a legacy application that is hosted on-premises Other applications hosted on AWS depend on the on-premises application for proper functioning In case of any application errors, the developer wants to be able to use Amazon CloudWatch to monitor and troubleshoot all applications from one place.

How can the developer accomplish this?

A.

Install an AWS SDK on the on-premises server to automatically send logs to CloudWatch .

B.

Download the CloudWatch agent to the on-premises server Configure the agent to use IAM user credentials with permissions for CloudWatch

C.

Upload log files from the on-premises server to Amazon S3 and have CloudWatch read the files

D.

Upload log files from the on-premises server to an Amazon EC2 instance and have the instance forward the logs to CloudWatch.

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Question # 11

A Developer needs to deploy an application running on AWS Fargate using Amazon ECS. The application has environment variables that must be passed to a container tor the application to initialize

How should the environment variables be passed to the container?

A.

Define an array that includes the environment variables under the environment parameter within the service definition

B.

Define an array that includes the environment variables under the environment parameter within the task definition

C.

Define an array that includes the environment variables under the entrypoint parameter within the task definition

D.

Define in array that includes the environment variables under the entryPoint parameter within the service definition

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Question # 12

A developer is writing an application that will process data delivered into an Amazon S3 bucket. The data is delivered approximately 10 times a day, and the developer expects the data will be processed in less than 1 minute, on average.

How can the developer deploy and invoke the application with the lowest cost and lowest latency?

A.

Deploy the application as an AWS Lambda function and invoke it with an Amazon CloudWatch alarm triggered by an S3 object upload

B.

Deploy the application as an AWS Lambda function and invoke it with an S3 event notification

C.

Deploy the application as an AWS Lambda function and invoke it with an Amazon CloudWatch scheduled event

D.

Deploy the application onto an Amazon EC2 instance and have it poll the S3 bucket for new objects.

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Question # 13

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.

Rolling update

B.

Immutable update

C.

User data

D.

ebextensions

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Question # 14

n on-premises application makes repeated calls to store files to Amazon S3. As usage of the application has increased, “LimitExceeded” errors are being logged.

What should be changed to fix this error?

A.

Implement exponential backoffs in the application.

B.

Load balance the application to multiple servers.

C.

Move the application to Amazon EC2.

D.

Add a one second delay to each API call.

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Question # 15

An application uses Amazon Kinesis Data Streams to ingest and process large streams of data records in real time. Amazon EC2 instances consume and process the data from the shards of the Kinesis data stream by using Amazon Kinesis Client Library (KCL). The application handles the failure scenarios and does not require standby workers. The application reports that a specific shard is receiving more data than expected. To adapt to the chnages in the rate of data flow, the “hot” shard is resharded.

Assuming that the initial number of shards in the Kinesis data stream is 4, and after resharding the number of shards increased to 6, what is the maximum number of EC2 instances that can be deployed to process data from all the shards?

A.

12

B.

6

C.

4

D.

1

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Question # 16

A company runs an e-commerce website that uses Amazon DynamoDB where pricing for items is dynamically updated in real time. At any given time, multiple updates may occur simultaneously for pricing information on a particular product. This is causing the original editor’s changes to be overwritten without a proper review process.

Which DynamoDB write option should be selected to prevent this overwriting?

A.

Concurrent writes

B.

Conditional writes

C.

Atomic writes

D.

Batch writes

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