Practice Test

True/False: Amazon S3 Transfer Acceleration is designed to optimize file transfer speed across long distances, such as inter-region or inter-continental transfers.

  • True
  • False

Answer: True

Explanation: Amazon S3 Transfer Acceleration makes public Internet file transfers faster by using Amazon CloudFront’s globally distributed Edge Locations as entry points into Amazon’s networks.

Which of the following can improve the performance of S3 multi-part upload?

  • a) Increasing the part size
  • b) Decreasing the part size
  • c) Using parallel uploads
  • d) Using sequential uploads

Answer: a) Increasing the part size, c) Using parallel uploads

Explanation: Increasing the part size and using parallel upload can improve the efficiency of multi-part upload. Larger parts result in fewer parts to upload. Parallel uploads allow multiple parts to be uploaded at the same time.

True/False: S3 Transfer Acceleration does not support Multipart uploads.

  • True
  • False

Answer: False

Explanation: S3 Transfer Acceleration does support Multipart uploads which helps to maximize network throughput and efficiency.

Which of the following services charge its users for using it?

  • a) S3 Transfer Acceleration
  • b) Multipart uploads
  • c) Both a and b
  • d) None of the above

Answer: a) S3 Transfer Acceleration

Explanation: There’s an additional cost associated with S3 Transfer Acceleration whereas, Multipart uploads is a method for uploading a single object as a set of parts and it doesn’t charge anything.

When should the multipart upload feature be considered while uploading files to S3?

  • a) When files are less than 5GB
  • b) When files are greater than 100MB
  • c) When files are less than 100MB
  • d) None of the above

Answer: b) When files are greater than 100MB

Explanation: The multipart upload should be used for files greater than 100MB. For smaller file sizes, the single PUT API operation would be less complicated and sufficient.

True/False: S3 Transfer Acceleration can be enabled or disabled at any time.

  • True
  • False

Answer: True

Explanation: The S3 Transfer Acceleration state (enabled or suspended) for a bucket can be changed at any time.

What is the minimum part size for S3 multipart upload, excluding the last part?

  • a) 5MB
  • b) 15MB
  • c) 5GB
  • d) 10MB

Answer: a) 5MB

Explanation: For multipart upload, apart from the last part, the parts must be at least 5MB.

Which AWS feature allows you to upload parts of an object in parallel to increase performance?

  • Multipart uploads

Answer: Multipart uploads

Explanation: Multipart uploads allows users to upload large objects in parts which can be uploaded independently, in any order, and even in parallel to achieve higher throughput.

True/False: You can pause transfer acceleration of an S3 bucket and resume it later without any data loss.

  • True
  • False

Answer: True

Explanation: You can suspend and then later resume transfer acceleration on an S3 bucket without data loss.

The use of S3 Transfer Acceleration usually results in _____ costs as compared to standard S3 data transfers.

  • a) Lower
  • b) Higher
  • c) Similar
  • d) No

Answer: b) Higher

Explanation: While S3 Transfer Acceleration optimizes the speed of data transfers, it does incur additional costs compared to standard S3 data transfers.

Interview Questions

What is Amazon S3 Transfer Acceleration?

Amazon S3 Transfer Acceleration enables fast, easy, and secure transfers of files over long distances between your client and an S3 bucket. It works by carrying data over the Amazon CloudFront Edge Locations.

How does S3 Transfer Acceleration improve memory performance?

S3 Transfer Acceleration reduces the amount of time required to fetch or put data into an S3 bucket by leveraging Amazon CloudFront ‘s globally distributed edge locations. This results in better throughput from an increased parallelism which can significantly improve memory performance.

What is multipart upload in Amazon S3?

Multipart upload is a feature in S3 that allows an object to be partitioned into multiple parts and these parts can be uploaded independently, in any sequence.

What are the benefits of using multipart uploads in Amazon S3?

The main benefits of using multipart uploads are improved upload speed as it allows parallel uploads, pause and resume capability for large files, and ability to begin an upload before you know the total size of the data.

How can I enable Amazon S3 Transfer Acceleration on my bucket?

Amazon S3 Transfer Acceleration for a bucket can be enabled through the Amazon S3 console by choosing the bucket, selecting properties, and then choosing Transfer Acceleration.

Are there any additional charges for enabling S3 Transfer Acceleration?

Yes, enabling S3 Transfer Acceleration incurs additional charges over the standard S3 pricing. The costs are determined based on the amount of data transferred out of Amazon S3 over the Acceleration endpoint.

Can I speed up data transfer to an S3 bucket that is not in my region with S3 Transfer Acceleration?

Yes, S3 Transfer Acceleration is designed to optimize the performance of transferring data over long distances and hence it can speed up the data transfer to an S3 bucket that is not in your region.

How can I tell if Amazon S3 Transfer Acceleration is working?

You can use the S3 Transfer Acceleration speed comparison tool available in the Amazon S3 console to compare the speed of Acceleration with standard S3 data transfer rates.

In what situations should I consider using S3 multipart uploads?

Consider using multipart uploads for objects larger than 100MB, or if you need to pause and resume file uploads, or to increase performance by uploading parts in parallel.

Is there any size limit for the parts in a multipart upload in Amazon S3?

Yes, each part in a multipart upload must be at least 5MB in size, except for the last part. The maximum size of a part can be 5GB.

Can I still use Amazon S3 Transfer Acceleration with a bucket policy in place?

Yes, you can use S3 Transfer Acceleration with a bucket policy in place as long as the bucket policy does not explicitly deny s3:PutAccelerateConfiguration or s3:GetAccelerateConfiguration.

Does Amazon S3 Transfer Acceleration support all APIs?

No, only the APIs that are used to GET and PUT objects support Amazon S3 Transfer Acceleration.

Is S3 Transfer Acceleration supported for all regions?

Amazon S3 Transfer Acceleration supports all Regions except for Buckets in the Regions: ap-northeast-3, ap-east-1, and cn-north-1.

What is the main difference between S3 Transfer Acceleration and Direct Connect?

S3 Transfer Acceleration is designed to optimize the speed of transferring data over long distances while AWS Direct Connect uses a dedicated network connection from your premises to AWS which can reduce your network costs, increase bandwidth throughput, and provide a more consistent network experience than internet-based connections.

Do I need to modify my application to use multipart upload/Download in Amazon S3?

Yes, to use multipart uploads or downloads, you will need to modify your application to handle the upload/download in parts. You can use the Amazon S3 libraries that have built-in support for multipart uploads and downloads.

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