S3

Question 1

What kind of requirement do S3 Bucket names have across accounts and across regions?

Answer 1

Buckets must have a **globally unique name (across all accounts and all regions) **

Question 2

At what kind do level are Buckets defined?

Answer 2

Buckets are defined at the regional level.

Question 3

Objects (files) in S3 Buckets have Keys. What is the key composed of?

Answer 3

The key is the full path to the object and is composed of prefix + object name.

Question 4

What 3 types of security are available in S3?

Answer 4

User-Based:
- IAM Policies - Which API calls should be allowed for a specific user from IAM.
Resource-Based:
- Bucket Policies: Bucket wide rules from the S3 console.
- Object Access Control List (ACL): Finer grain (can be disabled).
- Bucket Access Control List (ACL): Less common (can be disabled).

Question 5

Is S3 Versioning enabled at the bucket level?

Answer 5

True.

Question 6

Files that are not versioned prior to enabling versioning will have what as their version?

Answer 6

A “null” version.

Question 7

Does suspending versioning delete the previous versions?

Answer 7

No

Question 8

What must be enabled at the source and destination buckets for S3 Replication to be completed?

Answer 8

Versioning must be enabled.

Question 9

Can the source and destination buckets be in different AWS accounts for S3 Replication?

Answer 9

Yes

Question 10

What is CRR and what are it’s use cases?

Answer 10

Cross-Region Replication (CRR) is best used for compliance, lower latency access, replication across accounts.

Question 11

What is SRR and what are its uses cases?

Answer 11

Same-Region Replication (SRR) is best used for log aggregation, live replication between production and test accounts.

Question 12

What are the S3 Storage Classes?

Answer 12

• S3 Standard - General Purpose
• S3 Standard - Infrequent Access
• S3 One Zone - Infrequent Access
• S3 Glacier Instant Retrieval
• S3 Glacier Flexible Retrieval
• S3 Glacier Deep Archive
• S3 Intelligent Tiering

Question 13

What is the availability and use cases of S3 Standard - General Purpose?

Answer 13

99.99% availability and used for frequently accessed data. The use cases include big data analytics, mobile & gaming applications, and content distribution.

Question 14

Can you transition objects between storage classes?

Answer 14

Yes

Question 15

Moving objects between storage classes can be automated using what?

Answer 15

Lifecycle Rules

Question 16

Where should you move infrequently accessed objects?

Answer 16

Standard IA

Question 17

Where should you move archive objects that you don’t need fast access to?

Answer 17

Glacier or Glacier Deep Archive

Question 18

What 2 actions do Lifecycle Rules support?

Answer 18

• Transition Actions: Configure objects to transition to another storage class.
• Expiration Actions: Configure objects to expire (delete) after some time.