AWS Certified Developer Associate Practice Tests [2020]: 390 AWS Practice Exam Questions with Answers & detailed Explanations by Neal Davis & Neal Davis

Author:Neal Davis & Neal Davis [Davis, Neal]
Language: eng
Format: azw3, epub
Published: 2020-06-13T16:00:00+00:00

The Developer attempted to add two items for userid “user0001” with unique timestamps and received an error for the second item stating: “The conditional request failed”. What MUST the Developer do to resolve the issue?

1: Use the SDK to add the items

2: Update the table with a primary sort key for the timestamp attribute

3: Recreate the table with a composite key consisting of userid and timestamp

4: Add a local secondary index (LSI) for the timestamp attribute

40. Question

A Developer has deployed an AWS Lambda function and an Amazon DynamoDB table. The function code returns data from the DynamoDB table when it receives a request. The Developer needs to implement a front end that can receive HTTP GET requests and proxy the request information to the Lambda function. What is the SIMPLEST and most COST-EFFECTIVE solution?

1: Implement an API Gateway API with Lambda proxy integration

2: Implement an API Gateway API with a POST method

3: Implement an Elastic Load Balancer with a Lambda function target

4: Implement an Amazon Cognito User Pool with a Lambda proxy integration

41. Question

A Developer needs to write some code to invoke an AWS Lambda function using the AWS Command Line Interface (CLI). Which option must be specified to cause the function to be invoked asynchronously?

1: Set the –invocation-type option to Event

2: Set the –invocation-type option to Invoke

3: Set the –payload option to Asynchronous

4: Set the –qualifier option to Asynchronous

42. Question

A serverless application uses Amazon API Gateway an AWS Lambda function and a Lambda authorizer function. There is a failure with the application and a developer needs to trace and analyze user requests that pass through API Gateway through to the back end services. Which AWS service is MOST suitable for this purpose?

1: Amazon CloudWatch

2: Amazon Inspector

3: VPC Flow Logs

4: AWS X-Ray

43. Question

A website is being delivered using Amazon CloudFront and a Developer recently modified some images that are displayed on website pages. Upon testing the changes, the Developer noticed that the new versions of the images are not displaying. What should the Developer do to force the new images to be displayed?

1: Delete the images from the origin and then save the new version on the origin

2: Invalidate the old versions of the images on the edge caches

3: Invalidate the old versions of the images on the origin

4: Force an update of the cache

44. Question

A company is using Amazon CloudFront to provide low-latency access to a web application to its global users. The organization must encrypt all traffic between users and CloudFront, and all traffic between CloudFront and the web application. How can these requirements be met? (Select TWO)

1: Use AWS KMS to encrypt traffic between CloudFront and the web application

2: Set the Origin Protocol Policy to “HTTPS Only”

3: Set the Origin’s HTTP Port to 443

4: Set the Viewer Protocol Policy to “HTTPS Only” or “Redirect HTTP to HTTPS”

5: Enable the CloudFront option Restrict Viewer Access

45. Question

A Developer is working on an AWS Lambda function that accesses Amazon DynamoDB. The Lambda function must retrieve an item and update some of its attributes or create the item if it does not exist.

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