AWS Object Storage and CDN - S3, Glacier and CloudFront

Question 1

what is the URL for S3 static website hosting?

Answer 1

BUCKET-NAME.s3-website-AWS-REGION.amazonaws.com

Question 2

What is the S3 consistency model for new objects and edited/deleted objects?

Answer 2

Read after write consistentcy for PUTS of new objects

Eventual consistency for overwrite PUTS and DELETES (can take time to propagate)

Question 3

S3 has what consistency model for PUTS of new objects

Answer 3

Read After Write Consistency

Question 4

What is AWS Storage Gateway?

Answer 4

It’s an on-premise virtual appliance that can be used to cache S3 locally at a customers site.

Question 5

What is S3 One Zone - IA?

Answer 5

This is a Storage Tier that provides a lower cost option for infrequently accessed data but does not provide multiple Availability Zone data resilience (this is a replacement for Reduced Redundancy Storage)

Question 6

You have been asked by your company to create an S3 bucket with the name “acloudguru1234” in the EU West region. What would be the URL for this bucket?

Answer 6

https://s3-eu-west-1.amazonaws.com/acloudguru1234

Question 7

What is Amazon Glacier?

Answer 7

An AWS service designed for long term data archival.

Question 8

What is the availability on RRS?

Answer 8

99.99%

Question 9

S3 has eventual consistency for which HTTP Methods?

Answer 9

overwrite PUTS and DELETES

Question 10

One of your users is trying to upload a 7.5GB file to S3 however they keep getting the following error message - “Your proposed upload exceeds the maximum allowed object size.”. What is a possible solution for this?

Answer 10

Design your application to use the multi-part upload API for all objects

Question 11

What is the durability on RRS?

Answer 11

99.99%

Question 12

What is the durability on S3?

Answer 12

99.999999999%

Question 13

What is the availability on S3?

Answer 13

99.99%

Question 14

What is the minimum file size that I can store on S3?

Answer 14

1 Byte

Question 15

do individual objects inherit bucket permissions?

Answer 15

no, object permissions must be set per object

Question 16

what code is received for a successful upload to S3?

Answer 16

successful uploads will return an HTTP 200 code

Question 17

how can access to buckets be controlled?

Answer 17

using bucket access control lists or bucket policies

Question 18

what are the default permissions on buckets and their objects?

Answer 18

by default buckets and all of their objects are private

Question 19

once versioning is turned on for a bucket can it be disabled?

Answer 19

No, it can be suspended but not disabled

Question 20

where must versioning be enabled for cross regional replication to work

Answer 20

on both the source and destination buckets

Question 21

what are the requirements for lifecycle rules transitioning from S3 to S3-IA

Answer 21

object must be at least 128kb and it must be at least 30 days after the creation date of the object

Question 22

what are the requirements for lifecycle rules transitioning from S3-IA to Glacier

Answer 22

it must be at least 30 days after the object has transitioned to S3-IA (if relevant)

Question 23

what transitions are available using S3 lifecycle management?

Answer 23

objects can be transitioned to S3-IA, to Glacier, or deleted. These actions can be taken on current objects or on previous versions

Question 24

are cloudfront distributions limited to a single origin

Answer 24

No, you can have multiple origins in a distribution

Question 25

in what way can user access to cloudfront distributions be restricted

Answer 25

viewer access can be limited using signed URLs or signed cookies

Question 26

What are the valid configuration types for AWS Storage gateway?

Answer 26

The valid types are - Gateway-cached volumes, Gateway-stored volumes, Gateway-Virtual Tape Library

Question 27

You work for a market analysis firm who are designing a new environment. They will ingest large amounts of market data via Kinesis and then analyse this data using Elastic Map Reduce. The data is then imported in to a high performance NoSQL Cassandra database which will run on EC2 and then be accessed by traders from around the world. The database volume itself will sit on 2 EBS volumes that will be grouped into a RAID 0 volume. They are expecting very high demand during peak times, with an IOPS performance level of approximately 15,000. Which EBS volume should you recommend?

Answer 27

You should use provisioned IOPS for any requirement of 10,000 IOPS or more.

Question 28

What are the valid methodologies for encrypting data on S3?

Answer 28

The valid ways of encryption data on S3 are Server Side Encryption (SSE)-S3, SSE-C, SSE-KMS or a client library such as Amazon S3 Encryption Client.

Question 29

Which of the following is not supported by AWS Import/Export - Import to Amazon S3, Export from Amazon S3, Import to Amazon EBS, Import to Amazon Glacier, Export from Amazon Glacier

Answer 29

Export from Amazon Glacier

Question 30

You have started a new role as a solutions architect for an architectural firm that designs large sky scrapers in the Middle East. Your company hosts large volumes of data and has about 250Tb of data on internal servers. They have decided to store this data on S3 due to the redundancy offered by it. The company currently has a telecoms line of 2Mbps connecting their head office to the internet. What method should they use to import this data on to S3 in the fastest manner possible.

Answer 30

AWS Import/Export