Exam AWS Certified Cloud Practitioner topic 1 question 165 discussion

Shouldn't it be B: S3 One Zone-IA is for data that is accessed less frequently, but requires rapid access when needed. Unlike other S3 Storage Classes which store data in a minimum of three Availability Zones (AZs), S3 One Zone-IA stores data in a single AZ and costs 20% less than S3 Standard-IA. The 20% less fits the cost effective solution they are looking for.

Agreed, check this out: https://aws.amazon.com/s3/storage-classes/?trk=67bd8f28-3315-4e58-8488-8cd82ecb9cbc&sc_channel=ps&s_kwcid=AL!4422!3!596115621492!p!!g!!amazon%20s3&ef_id=CjwKCAjw2OiaBhBSEiwAh2ZSP5GrvVvKEwQRLgRvz-wZmpDqyvBO4CHtQu-abwSq6dGpMqPZlfIRYxoCvocQAvD_BwE:G:s&s_kwcid=AL!4422!3!596115621492!p!!g!!amazon%20s3 S3 Standard-IA is for data that is accessed less frequently, but requires rapid access when needed. S3 Standard-IA offers the high durability, high throughput, and low latency of S3 Standard, with a low per GB storage price and per GB retrieval charge. This combination of low cost and high performance make S3 Standard-IA ideal for long-term storage, backups, and as a data store for disaster recovery files. S3 Storage Classes can be configured at the object level and a single bucket can contain objects stored across S3 Standard, S3 Intelligent-Tiering, S3 Standard-IA, and S3 One Zone-IA. You can also use S3 Lifecycle policies to automatically transition objects between storage classes without any application changes.

Correct Answer is C : S3 Standard Infrequent (S3 Standard IA) Keywords here : lecacy data , rarely accessed , critical and cannot be recreated , retrieval within seconds A. S3 Standard >> designed for frequent accessed data and has the highest cost compare to others B. S3 One Zone-Infrequent Access (S3 One Zone-IA) >> stores in only one Availability zone and the question is critical and cannot be recreated. C. S3 Standard-Infrequent Access (S3 Standard-IA) > designed for data that is infrequently accessed but needs to be retrieved quickly i(within milliseconds) when required D. S3 Glacier >> designed for archival storage and retrieval times range from minutes to hours.

This feels out of scope for CCP... too specific

The data is critical and cannot be recreated. but requires rapid access when needed

D. actually. We have Glacier Instant Retrieval Exactly for this purpose, but if it's not the instant retrieval storage class, i would say C.

The answer is S3 One Zone-IA as the question says the data can not be recreated. For S3 standard-IA, the data can be recreated. This therefore makes B the answer.

Rarly used - yet infrequent is not the most cost-effective way over standard... hmmm... interesting... B all the way

the MOST cost-effectively is Glacier!! IR has access in ms!

Amazone Estandard IA

The correct answer is option B. S3 One Zone-Infrequent Access (S3 One Zone-IA). This class of storage is more economical compared to S3 Standard and S3 Standard-IA, as data is stored in just one availability zone instead of several. Despite this, the data is still available for retrieval within seconds, meeting the company's requirements.

https://aws.amazon.com/es/s3/storage-classes/ Option C The S3 Standard - Infrequent Access type is used with data that is accessed less frequently, but requires fast access when needed. The S3 Standard - Infrequent Access type offers the level of high durability, high throughput, and low latency of S3 Standard, with a small storage charge per GB and recovery charge per GB. The combination of high performance and low cost makes S3 Standard - Infrequent Access the ideal choice for long-term storage, backup, and as a data store for disaster recovery archives. S3 storage classes can be configured at the object level, and a single bucket can contain objects stored in S3 Standard, S3 Smart Layers, S3 Standard - Infrequent Access, and S3 Single Zone - Infrequent Access. You can also use S3 lifecycle policies to automatically move objects between storage types without application changes.

C. S3 Standard-Infrequent Access (S3 Standard-IA) B is incorrect, coz data is critical and cannot be recreated which need multiple AZs to support high availability.

Answer is B. S3 One Zone-Infrequent Access (S3 One Zone-IA) Data is critical and cannot be created, needs to be available for retrieval within seconds. https://aws.amazon.com/s3/storage-classes/#__ `It’s a good choice for storing secondary backup copies of on-premises data or easily re-creatable data.`

S3 One Zone-IA is for data that is accessed less frequently, but requires rapid access when needed. Unlike other S3 Storage Classes which store data in a minimum of three Availability Zones (AZs), S3 One Zone-IA stores data in a single AZ and costs 20% less than S3 Standard-IA. Refer: https://aws.amazon.com/s3/storage-classes/#:~:text=S3%20One%20Zone%2DIA%20is,less%20than%20S3%20Standard%2DIA.

Both S3 One Zone-IA and S3 Standard-IA meet the company's requirements of storing rarely accessed data that needs to be available for retrieval within seconds. The main difference between the two storage classes is the cost. S3 One Zone-IA is less expensive than S3 Standard-IA because it stores data in a single Availability Zone. However, S3 Standard-IA stores data in three Availability Zones, which makes it more resilient to outages. Here is a table that summarizes the key differences between S3 One Zone-IA and S3 Standard-IA: Storage class Cost Retrieval time Data redundancy S3 One Zone-IA Less expensive Milliseconds Single Availability Zone S3 Standard-IA More expensive Minutes Three Availability Zones

Should be C S3 Standard-IA: S3 Standard-IA is suitable for scenarios where data access patterns are infrequent but where high durability and availability are required. It is a good choice for backup and restore data, disaster recovery, and long-term storage of rarely accessed data. S3 One Zone-IA: S3 One Zone-IA is recommended for scenarios where data can be easily reproduced or has lower value, and the lower cost is prioritized over the risk of data loss due to the loss of a single Availability Zone. It is suitable for scenarios such as secondary backups, replicated data, or easily reproducible data.