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Amazon AWS Certified Developer – Associate Sample Questions (Q72-Q77):
NEW QUESTION # 72
A company is using AWS CodeBuild to compile a website from source code stored in AWS CodeCommit. A recent change to the source code has resulted in the CodeBuild project being unable to successfully compile the website.
How should the Developer identify the cause of the failures?
- A. Check the build logs of the failed phase in the last build attempt in the AWS CodeBuild project build history.
- B. Use a custom Docker image that includes the AWS X-Ray agent in the AWS CodeBuild project configuration.
- C. Manually re-run the build process on a local machine so that the output can be visualized.
- D. Modify the buildspec.yml file to include steps to send the output of build commands to Amazon CloudWatch.
Answer: D
Explanation:
https://blog.codecentric.de/en/2016/12/serverless-soap-legacy-api-integration-java-aws-lambda-aws-api-gateway/
NEW QUESTION # 73
Queries to an Amazon DynamoDB table are consuming a large amount of read capacity. The table has a significant number of large attributes. The application does not need all of the attribute data.
How can DynamoDB costs be minimized while maximizing application performance?
- A. Create a global secondary index with a minimum set of projected attributes.
- B. Batch all the writes, and perform the write operations when no or few reads are being performed.
- C. Load balance the reads to the table using an Application Load Balancer.
- D. Implement exponential backoffs in the application.
Answer: D
Explanation:
Explanation
https://docs.aws.amazon.com/AWSEC2/latest/APIReference/query-api-troubleshooting.html
NEW QUESTION # 74
What is web identity federation?
- A. Use of AWS STS Tokens to log in as a Google or Facebook user.
- B. Use of an identity provider like Google or Facebook to exchange for temporary AWS security credentials.
- C. Use of AWS IAM User tokens to log in as a Google or Facebook user.
- D. Use of an identity provider like Google or Facebook to become an AWS IAM User.
Answer: B
NEW QUESTION # 75
A developer is building an application integrating an Amazon API Gateway with an AWS Lambda function.
When calling the API, the developer receives the following error. Wed Nov 03 01:13:00 UTC 2017 : Method completed with status: 502 What should the developer do to resolve the error?
- A. Change the HTTP endpoint of the API to an HTTPS endpoint.
- B. Change the format of the payload sent to the API Gateway.
- C. Change the authorization header in the API call to access the Lambda function.
- D. Change the format of the Lambda function response to the API call.
Answer: D
NEW QUESTION # 76
A set of APIs are exposed to customers using the Amazon API Gateway. These APIs have caching enabled on the API Gateway. Customers have asked for an option to invalidate this cache for each of the APIs.
What action can be taken to allow API customers to invalidate the API Cache?
- A. Ask customers to invoke an AWS API endpoint which invalidates the cache.
- B. Ask customers to add a query string parameter called “INVALIDATE_CACHE” when making an API call.
- C. Ask customers to pass an HTTP header called Cache-Control:max-age=0.
- D. Ask customers to use AWS credentials to call the InvalidateCache API.
Answer: C
Explanation:
Explanation
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control
https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-caching.html Invalidate an API Gateway Cache Entry A client of your API can invalidate an existing cache entry and reload it from the integration endpoint for individual requests. The client must send a request that contains the Cache-Control: max-age=0 header. The client receives the response directly from the integration endpoint instead of the cache, provided that the client is authorized to do so. This replaces the existing cache entry with the new response, which is fetched from the integration endpoint.
NEW QUESTION # 77
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