AWS CERTIFIED DEVELOPER EXAM - S3 FAQ

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AWS CERTIFIED DEVELOPER EXAM - S3 FAQ

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Wasn't there a US Standard region?

Answer:

We renamed the US Standard Region to US East (Northern Virginia) Region to be consistent with AWS regional naming conventions. There is no change to the endpoint and you do not need to make any changes to your application.Question 2: Can I setup a trash, recycle bin, or rollback window on my Amazon S3 objects to recover from deletes and overwrites?

Answer:

You can use Lifecycle rules along with Versioning to implement a rollback window for your Amazon S3 objects. For example, with your versioning-enabled bucket, you can set up a rule that archives all of your previous versions to the lower-cost Glacier storage class and deletes them after 100 days, giving you a 100 day window to roll back any changes on your data while lowering your storage costs.Question 3: How is my storage charge calculated for Amazon S3 objects archived to Amazon Glacier?

Answer:

The volume of storage billed in a month is based on average storage used throughout the month, measured in gigabyte-months (GB-Months). Amazon S3 calculates the object size as the amount of data you stored plus an additional 32 kilobytes of Glacier data plus an additional 8 KB of S3 standard storage data. Amazon Glacier requires an additional 32 KB of data per object for Glacier's index and metadata so you can identify and retrieve your data. Amazon S3 requires 8KB to store and maintain the

user-defined name and metadata for objects archived to Amazon Glacier. This enables you to get a real-time list of all of your Amazon S3 objects, including those stored using the Amazon Glacier option, using the Amazon S3 LIST API. For example, if you have archived 100,000 objects that are 1GB each,

your billable storage would be:

1.000032 gigabytes for each object x 100,000 objects = 100,003.2 gigabytes of Amazon Glacier storage.

0.000008 gigabytes for each object x 100,000 objects = 0.8 gigabytes of Amazon S3 Standard storage.The fee is calculated based on the current rates for your region on the Amazon S3 Pricing Page.

Question 4: Where can I find more information about security on AWS?

Answer:

For more information on security on AWS please refer to our Amazon Web Services: Overview of Security Processes document.

Question 5: What can I do with Amazon S3 event notifications?

Answer:

Amazon S3 event notifications enable you to run workflows, send alerts, or perform other actions in response to changes in your objects stored in Amazon S3. You can use Amazon S3 event notifications to set up triggers to perform actions including transcoding media files when they are uploaded, processing data files when they become available, and synchronizing Amazon S3 objects with other data stores. You can also set up event notifications based on object name prefixes and suffixes. For example, you can choose to receive notifications on object names that start with "images/." Question 6: Can S3 Inventory improve the performance for my big data jobs and business workflow applications?

Answer:

Yes, S3 Inventory can be used as a ready-made input into a big data job or workflow application instead of the synchronous S3 LIST API, saving the time and compute resources it takes to call and process the LIST API response.

Question 7: How does Amazon Macie secure your data?

Answer:

As part of the data classification process, Amazon Macie identifies customers' objects in their S3 buckets, and streams the object contents into memory for analysis. When deeper analysis is required for complex file formats, Amazon Macie will download a full copy of the object, only keeping it for the short time it takes to fully analyze the object. Immediately after Amazon Macie has analyzed the file content for data classification, it deletes the stored content and only retains the metadata required for future analysis. At any time, customers can revoke Amazon Macie access to data in the Amazon S3 bucket. For more information, go to the Amazon Macie User Guide.

Question 8: Can I comply with EU data privacy regulations using Amazon S3?

Answer:

Customers can choose to store all data in the EU by using the EU (Ireland) or EU (Frankfurt) region. It is your responsibility to ensure that you comply with EU privacy laws.

Question 9: What kind of data can I store?

Answer:

Objects

Question 10: How available is Standard - IA?

Answer:

Designed for 99.9% availability, Standard - IA has a thinner front end that provides nine one-hundredths of a percent less availability than S3 Standard. Standard - IA carries a service level agreement providing service credits if availability is less than our service commitment in any billing cycle.

Question 11: What happens if traffic from my application suddenly spikes?

Answer:

Amazon S3 was designed from the ground up to handle traffic for any Internet application.Pay-as-you-go pricing and unlimited capacity ensures that your incremental costs don't change and that your service is not interrupted. Amazon S3's massive scale enables us to spread load evenly, so that no individual application is affected by traffic spikes.

Question 12: How can I update the Object Tags on my objects?

Answer:

Object Tags can be changed at any time during the lifetime of your S3 object, you can use either the AWS Management Console, the REST API, the AWS CLI, or the AWS SDKs to change your object tags. Note that all changes to tags outside of the AWS Management Console are made to the full tag set. If you have five tags attached to a particular object and want to add a sixth, you need to include the original five tags in that request.

Question 13: Do your prices include taxes?

Answer:

Except as otherwise noted, our prices are exclusive of applicable taxes and duties, including VAT and applicable sales tax. For customers with a Japanese billing address, use of AWS services is subject to Japanese Consumption Tax. Learn more.

Question 14: What are S3 Object Tags?

Answer:

S3 Object Tags are key-value pairs applied to S3 objects which can be created, updated or deleted at any time during the lifetime of the object. With these, you'll have the ability to create Identity and Access Management (IAM) policies, setup S3 Lifecycle policies, and customize storage metrics. These object-level tags can then manage transitions between storage classes and expire objects in the background.

Question 15: How am I charged for using Versioning?

Answer:

Normal Amazon S3 rates apply for every version of an object stored or requested. For example, let's look at the following scenario to illustrate storage costs when utilizing Versioning (let's assume the

current month is 31 days long):

1) Day 1 of the month: You perform a PUT of 4 GB (4,294,967,296 bytes) on your bucket.

2) Day 16 of the month: You perform a PUT of 5 GB (5,368,709,120 bytes) within the same bucket using the same key as the original PUT on Day 1.When analyzing the storage costs of the above operations, please note that the 4 GB object from Day 1 is not deleted from the bucket when the 5 GB object is written on Day 15. Instead, the 4 GB object is preserved as an older version and the 5 GB object becomes the most recently written version of the

object within your bucket. At the end of the month:

Total Byte-Hour usage [4,294,967,296 bytes x 31 days x (24 hours / day)] + [5,368,709,120 bytes x 16 days x (24 hours / day)] = 5,257,039,970,304 Byte-Hours.Conversion to Total GB-Months 5,257,039,970,304 Byte-Hours x (1 GB / 1,073,741,824 bytes) x (1 month / 744 hours) = 6.581 GB-Month The fee is calculated based on the current rates for your region on the Amazon S3 Pricing Page.

Question 16: How often is the Storage Class Analysis updated?

Answer:

How often is the Storage Class Analysis updated?

Question 17: Can I tier objects from Standard - IA to Amazon Glacier?

Answer:

Yes. In addition to using lifecycle policies to migrate objects from Standard to Standard - IA, you can also set up lifecycle policies to tier objects from Standard - IA to Amazon Glacier.