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* AWS Certified Solutions Architect - Associate > AWS Fundamentals: RDS + Aurora + ElastiCache > Flashcards

AWS Fundamentals: RDS + Aurora + ElastiCache Flashcards

1
Q

What is Amazon RDS?

A
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2
Q

What are the advantage of using RDS versus deploying a DB on EC2?

A
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3
Q

What is RDS Storage Auto-Scaling and how does it work?

A
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4
Q

What are RDS Read Replicas?

A
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5
Q

Where can you create RDS Read Replicas (within AZ, cross AZ, cross region)?

A

All of them!

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6
Q

Is replication in RDS Read Replicas sync or async?

A

Async

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7
Q

Does an application have to be aware of read replicas in RDA?

A

Yes, it must update the connection string to leverage read replicas

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8
Q

What are some use cases for using Read Replicas in RDS?

A
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9
Q

What are the networking costs associated with Read Replicas in RDS?

A
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10
Q

What is RDS Multi-AZ (Disaster Recovery)?

A
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11
Q

Is RDS Multi-AZ sync or async?

A

Sync

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12
Q

What option is used for scaling in RDS?

A

Read Replicas

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13
Q

What option is used for disaster recovery in RDS?

A

Multi-AZ

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14
Q

Can Read Replicas be set-up as Multi-AZ for disaster recover purposes?

A

Yes!

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15
Q

How do you make an RDS database go from Single-AZ to Multi-AZ?

A
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16
Q

What is RDS Custom?

A
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17
Q

What is Amazon Aurora?

A
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18
Q

What database engines are compatible with Amazon Aurora?

A

MySQL and Postgres

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19
Q

How does high-availability and read scaling work in Amazon Aurora?

A
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20
Q

How do read/writes work in an Aurora cluster?

A
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21
Q

How does scalability work with Read Replicas in Amazon Aurora?

A

The client connects to a Reader Endpoint (helps with connection load balancing) and it connects to all the read replicas

Load balancing happens at the connection level, not the statement level

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22
Q

What are the main features of Amazon Aurora?

A
23
Q

What is Backtrack in Amazon Aurora

A

It is used to restore data at any point in time without using backups (up to 72 hours)

24
Q

How does Replica Auto-Scaling work in Amazon Aurora?

A
25
Q

How do Custom Endpoints work in Amazon Aurora?

A
26
Q

What is Amazon Aurora Serverless?

A
27
Q

What is Aurora Multi-Master?

A
28
Q

What is Global Aurora?

A
29
Q

What is the typical amount of time it takes to replicate data using Cross-Region in Aurora?

A

1 second

30
Q

What is Aurora’s integration with Machine Learning in AWS ML services?

A
31
Q

What AWS ML services does Aurora integrate with?

A
  • Amazon SageMaker (use with any ML model)
  • Amazon Comprehend (for sentiment analysis)
32
Q

What are the features of RDS Backups?

A
33
Q

What is the earliest backup available in RDS using Backups?

A

5 minutes ago

34
Q

What is a way to save money if you only use a database for a short period of time every month?

A

Instead of just stopping the database (which will still incur costs) take a snapshot of the database and restore it when you need it again

35
Q

What are the features of Aurora Backups?

A
36
Q

What are the RDS and Aurora Backup restore options?

A
37
Q

What is Aurora Database Cloning?

A
38
Q

What encryption options are available in RDS and Aurora?

A
39
Q

What security options are available in RDS and Aurora?

A
40
Q

What is Amazon RDS Proxy?

A
41
Q

What is a service that you can use to improve database efficiency by reducing the stress on RDS database resources and minimize open connections?

A

RDS Proxy

42
Q

What is a service that you can use to reduce RDS & Aurora failover by as much as 66%?

A

RDS Proxy

43
Q

How can you enforce IAM authentication for RDS databases and securely store IAM credentials in AWS Secrets Manager?

A

Use RDS Proxy

44
Q

Can you make an RDS Proxy publicly accessible?

A

No

45
Q

What is Amazon ElastiCache?

A
46
Q

ElastiCache Solution Architecture Diagram - DB Cache (example)

A
47
Q

ElastiCache Solution Architecture Diagram - User Session Store (example)

A
48
Q

What are the differences between Redis and Memcached in ElastiCache?

A
49
Q

If you need to cache Sets or Sorted Sets, what AWS service would you use?

A

ElastiCache with Redis

50
Q

If you need high-availability with a caching service what would you recommend?

A

ElastiCache with Redis

51
Q

What are the options for security in ElastiCache?

A
52
Q

What are some pattern (uses) for ElastiCache?

A
53
Q

What are use cases for Redis in ElastiCache?

A
54
Q

What are the most important database ports?

A

* AWS Certified Solutions Architect - Associate (28 decks)

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