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Certificate AWS-Developer Exam - Detailed AWS-Developer Study Dumps

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Amazon AWS Certified Developer Associate Exam (DVA-C02) Sample Questions (Q142-Q147):

NEW QUESTION # 142
A user has configured CloudWatch monitoring on an EBS backed EC2 instance. If the user has not attached any additional device, which of the below mentioned metrics will always show a 0 value?

A. NetworkOut
B. NetworkIn
C. CPUUtilization
D. DiskReadBytes

Answer: D

NEW QUESTION # 143
A developer is working on a web application that uses Amazon DynamoDB as its data store The application has two DynamoDB tables one table that is named artists and one table that is named songs The artists table has artistName as the partition key. The songs table has songName as the partition key and artistName as the sort key The table usage patterns include the retrieval of multiple songs and artists in a single database operation from the webpage. The developer needs a way to retrieve this information with minimal network traffic and optimal application performance.
Which solution will meet these requirements'?

A. Perform a Scan operation on each table that filters by the list of songName/artistName for the songs table and the list of artistName in the artists table.
B. Perform a BatchGetltem operation that returns items from the two tables. Use the list of songName artistName keys for the songs table and the list of artistName key for the artists table.
C. Perform a BatchGetltem operation on the songs table that uses the songName/artistName keys. Perform a BatchGetltem operation on the artists table that uses artistName as the key.
D. Create a local secondary index (LSI) on the songs table that uses artistName as the partition key Perform a query operation for each artistName on the songs table that filters by the list of songName Perform a query operation for each artistName on the artists table

Answer: B

Explanation:
* Scenario: Application needs to fetch songs and artists efficiently in a single operation.
* BatchGetItem: This DynamoDB operation retrieves multiple items across different tables based on their primary keys in a single request.
* Optimized for Request Batching: This approach reduces network traffic compared to performing multiple queries individually.
* Data Modeling: The songs table is designed appropriately for this access pattern using artistName as the sort key.
References:
Amazon DynamoDB BatchGetItem: https://docs.aws.amazon.com/amazondynamodb/latest/APIReference
/API_BatchGetItem.ht

NEW QUESTION # 144
Which code snippet below returns the URL of a load balanced web site created in CloudFormation with an AWS::ElasticLoadBalancing::LoadBalancer resource name "ElasticLoad Balancer"?

A. "Fn::Join" : ["". [ "http://", {"Fn::GetAtr" : [ "ElasticLoadBalancer","Url"]}]]
B. "Fn::Join" : ["". [ "http://", {"Ref" : "ElasticLoadBalancerUrl"}]]
C. "Fn::Join" : ["". [ "http://", {"Fn::GetAtr" : [ "ElasticLoadBalancer","DNSName"]}]]
D. "Fn::Join" : [".", [ "http://", {"Ref" : "ElasticLoadBalancerDNSName"}]]

Answer: C

NEW QUESTION # 145
When developing an AWS Lambda function that processes Amazon Kinesis Data Streams, Administrators within the company must receive a notice that includes the processed data.
How should the Developer write the function to send processed data to the Administrators?

A. Separate the Lambda handler from the core logic
B. Use Amazon CloudWatch Events to send the processed data
C. Push the processed data to Amazon SQS
D. Publish the processed data to an Amazon SNS topic

Answer: B

NEW QUESTION # 146
A company has an encrypted Amazon S3 bucket. An Application Developer has an IAM policy that allows access to the S3 bucket, but the Application Developer is unable to access objects within the bucket.
What is a possible cause of the issue?

A. The S3 bucket policy fails to explicitly grant access to the Application Developer
B. The S3 bucket policy explicitly denies access to the Application Developer
C. The AWS KMS key for the S3 bucket fails to list the Application Developer as an administrator
D. The S3 ACL for the S3 bucket fails to explicitly grant access to the Application Developer

Answer: A

Explanation:
Explanation/Reference: https://docs.aws.amazon.com/AmazonS3/latest/dev/example-bucket-policies.html

NEW QUESTION # 147
......

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