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AWS Certified Developer Associate > S3 - Introduciton > Flashcards

S3 - Introduciton Flashcards

1
Q

What are the uses cases of Amazon S3?

A
  • Backup and storage
  • Disaster Recovery
  • Archive
  • Hybrid Cloud storage
  • Application hosting
  • Media hosting
  • Data lakes & big data analytics
  • Software delivery
  • Static website
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2
Q

What level are the S3 buckets defined?

A

Bucket names must be unique across al regions but bucket defines on REGION level..

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3
Q

What are the S3 bucket naming conventions?

A
  • No uppercase, No underscore
  • 3-63 characters long
  • Not an IP
  • Must start with lowercase letter or number
  • Must NOT start with the prefix xn–
  • Must NOT end with the suffix -s3alias
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4
Q

Describe S3 Objects

A
  • Objects are the files that has been uploaded
  • The key is the full path: s3://my-bucket/my-file.txt
  • There are no actual directories
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5
Q

What is the max object size in S3?

A

5TB

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6
Q

How to upload a file that is more than 5 Gb?

A

Use the “multi–part upload”

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7
Q

What can you store with the S3 object?

A
  • Metadata
  • Tags (max 10)
  • Version id if enabled
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8
Q

Describe the S3 Security

A
  • User-Based
  • IAM Policies
  • Resource-Based
  • Bucket Policies – bucket wide rules from the S3 console - allows cross account
  • Object Access Control List (ACL) – finer grain (can be disabled)
  • Bucket Access Control List (ACL) – less common (can be disabled)
  • Note: an IAM principal can access an S3 object if
  • The user IAM permissions ALLOW it OR the resource policy ALLOWS it
  • AND there’s no explicit DENY
  • Encryption: encrypt objects in Amazon S3 using encryption keys
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9
Q

What are S3 Bucket policies?

A

JSON based policies, similar to IAM Policies

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10
Q

Can you enable your bucket to other Amazon user outside your company?

A

Yes with Cross-Account Access

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11
Q

How does Amazon try to prevent data leaks?

A

“Block all public access” setting is always on by default

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12
Q

How can you enable versioning on S3?

A

Versioning is enabled on bucket level, same key overwrite the version.
Easy roll back, protect from unintended dekletes
Not versioned files will have “null” as version

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13
Q

Define the S3 Replications

A
  • Must enable Versioning in source and destination buckets
  • Cross-Region Replication (CRR) - compliance, lower latency
  • Same-Region Replication (SRR) - log aggregation, live replica
  • Buckets can be in different AWS accounts
  • Copying is asynchronous
  • Must give proper IAM permissions to S3
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14
Q

What is S3 Batch Replciation?

A

After you enable S3 Replication, it enables to replicate existing objects.

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15
Q

Can you replicate delete markers in S3?

A

yes you can.

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16
Q

Can you chain S3 replication?

A

No, replication is not chained.

17
Q

What are the S3 Storage Classes?

A
  • Amazon S3 Standard - General Purpose
  • Amazon S3 Standard-Infrequent Access (IA)
  • Amazon S3 One Zone-Infrequent Access
  • Amazon S3 Glacier Instant Retrieval
  • Amazon S3 Glacier Flexible Retrieval
  • Amazon S3 Glacier Deep Archive
  • Amazon S3 Intelligent Tiering
18
Q

Describe S3 Standard General Purpose class

A
  • Used for frequently accessed data
  • Low latency and high throughput
  • Sustain 2 concurrent facility failures
  • Use Cases: Big Data analytics, mobile & gaming applications, content distribution…
19
Q

Describe S3 Standard Infrequent Access class

A
  • For data that is less frequently accessed, but requires rapid access when needed
  • Lower cost than S3 Standard
  • Amazon S3 Standard-Infrequent Access (S3 Standard-IA) -> DR, backup
  • Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA -> secodnary backup
20
Q

Describe S3 Glacier Storage Classes

A
  • Low-cost object storage meant for archiving / backup
  • Pricing: price for storage + object retrieval cost
  • Amazon S3 Glacier Instant Retrieval
  • Millisecond retrieval, great for data accessed once a quarter
  • Minimum storage duration of 90 days
  • Amazon S3 Glacier Flexible Retrieval (formerly Amazon S3 Glacier):
  • Expedited (1 to 5 minutes), Standard (3 to 5 hours), Bulk (5 to 12 hours) – free
  • Minimum storage duration of 90 days
  • Amazon S3 Glacier Deep Archive – for long term storage:
  • Standard (12 hours), Bulk (48 hours)
  • Minimum storage duration of 180 days
21
Q

Describe S3 Intelligent-Tiering

A
  • Moves objects automatically between Access Tiers based on usage
  • There are no retrieval charges in S3 Intelligent-Tiering
  • Frequent Access tier (automatic): default tier
  • Infrequent Access tier (automatic): objects not accessed for 30 days
  • Archive Instant Access tier (automatic): objects not accessed for 90 days
  • Archive Access tier (optional): configurable from 90 days to 700+ days
  • Deep Archive Access tier (optional): config. from 180 days to 700+ days

AWS Certified Developer Associate (17 decks)

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