Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 203 discussion

Correct Ans is A: Use Lambda@Edge. See the question "single-use text file" will be sent in response. Single-use text file means that file will be used only one time so whats the benefit of the caching it on the cloudfront as it will not be abled to be used again. So what other thing can be done is to use Lambda@Edge to compress the file which will reduce the size of the file and hence less data will be transferred and less will be the transfer charges.

To reduce the transfer costs, content should be cached at the edges. To further reduce transfer costs, enable processing of the requests on the edges. By doing this, the Edge locations will have much fewer going back to the origin server to process the requests. The shorts requests can already be processed and then immediately returned to the user, while all being done at the Edge Locations. Correct answer: Lambda@Edge

The right answer is C. Enabling caching on the CloudFront distribution allows CloudFront edge locations to store copies of frequently accessed files. This reduces the origin server's load and data transfer costs, as frequently requested files are served from the edge locations, closer to the users.

Ans. A https://aws.amazon.com/blogs/networking-and-content-delivery/dynamically-route-viewer-requests-to-any-origin-using-lambdaedge/

A for sure

Agree A is the correct Answer.

Are these dumps worth in august 2021 or it is just a clickbait?

Explanation: B seems more expensive; C does not seem right because they are single use files and will not be needed again from the cache; D multipart mainly for large files and will not reduce data and cost; A seems the best: change the application code to compress the files and reduce the amount of data transferred to save costs.

Passed the exam on 26th June, this question was on my test.

Passed the exam on 19th June 2021. This question appeared in my exam. Marking it for future help

Still the question is: CloudFront can compress file by itself, why Lambda@Edge is even needed?

unable to change the source code is not an issue because the compression happens at the edge, right before sending to the user. However, CloudFront can compress file by itself, why Lambda@Edge is even needed? https://docs.amazonaws.cn/en_us/AmazonCloudFront/latest/DeveloperGuide/ServingCompressedFiles.html

A. this was in my exam today . passed.

What should a solutions architect do to reduce costs? If we use Lambda it will consume some money, i dont know exactly how much money we reduce with Lambda, so im more to C for caching.

https://aws.amazon.com/lambda/edge/: "Lambda@Edge is a feature of Amazon CloudFront that lets you run code closer to users of your application, which improves performance and reduces latency. With Lambda@Edge, you don't have to provision or manage infrastructure in multiple locations around the world. You pay only for the compute time you consume - there is no charge when your code is not running. With Lambda@Edge, you can enrich your web applications by making them globally distributed and improving their performance — all with zero server administration. Lambda@Edge runs your code in response to events generated by the Amazon CloudFront content delivery network (CDN). Just upload your code to AWS Lambda, which takes care of everything required to run and scale your code with high availability at an AWS location closest to your end user." Answer is A

A. Process of elimination. "Single-Use Text-file"

Should be Lambda edge