S3

Question 1

What is the durability of S3?

Answer 1

99.(11 9’s)%

Question 2

Which storage class should you choose if you can afford for 0.5% of data to be lost?

Answer 2

S3 One Zone-IA provides 99.5% availability

Question 3

Which storage class of S3 has the highest availability?

Answer 3

S3 Standard at 99.99%

Question 4

What is the minimum file size you can store in S3?

Answer 4

0 bytes

Question 5

What is the minimum storage duration for S3 Intelligent Tiering, Standard-IA and One Zone-IA?

Answer 5

30 days

Question 6

What is the minimum storage duration for S3 Glacier?

Answer 6

90 days

Question 7

Which glacier retrieval option would you choose to fetch a lot of data within 12 hours?

Answer 7

Glacier Bulk

Question 8

How long does it take to fetch data from Glacier using Standard retrieval?

Answer 8

3-5 hours

Question 9

What kind of policy would you implement to control access to an object in S3?

Answer 9

ACL

Question 10

What kind of policy would you implement to determine access at a bucket level?

Answer 10

Bucket Policy

Question 11

What three types of encryption can you use to encrypt S3 objects?

Answer 11

Amazon SSE-S3, AWS SSE-KMS and AWS SSE-C, or you can just encrypt before you upload the file

Question 12

True or False: Once enabled, you cannot disable S3 versioning?

Answer 12

True

Question 13

How would you grant console and programmatic access to an S3 bucket or object to another account?

Answer 13

Create a cross-account role

Question 14

How might you speed up uploads to S3 if, for instance, you have a lot of data to upload and are located in a remote geographic location with poor bandwidth?

Answer 14

Use S3 Transfer Acceleration, which takes advantage of AWS Edge Locations part of the CloudFront network to upload over an optimized network path.

Question 15

What can you do to upload a file larger than 5GB?

Answer 15

Use multipart uploads, which is recommended for files larger than 100MB anyway.

Question 16

What is the PUTS per second throughput to S3 for WRITES?

Answer 16

3,500 per-prefix

Question 17

What is the maximum file storage size in S3?

Answer 17

5 TB

Question 18

What is the requests per second for S3 READS?

Answer 18

5,500 per-prefix

Question 19

How can you increase S3 read retrieval performance?

Answer 19

Use more prefixes

Question 20

What service would you use to replicate large amounts of data from an on-premises data center (like a NAS or file system) to AWS on a regular basis?

Answer 20

AWS DataSync, which can transfer between NFS, SMB file servers, Snowcone, S3, EFS, and Amazon FSx for Windows File Sever