Exam AWS Certified Solutions Architect - Professional topic 1 question 650 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional

Question #: 650
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A solutions architect needs to define a reference architecture for a solution for three-tier applications with web, application, and NoSQL data layers. The reference architecture must meet the following requirements:
✑ High availability within an AWS Region
✑ Able to fail over in 1 minute to another AWS Region for disaster recovery
✑ Provide the most efficient solution while minimizing the impact on the user experience
Which combination of steps will meet these requirements? (Choose three.)

A. Use an Amazon Route 53 weighted routing policy set to 100/0 across the two selected Regions. Set Time to Live (TTL) to 1 hour.
B. Use an Amazon Route 53 failover routing policy for failover from the primary Region to the disaster recovery Region. Set Time to Live (TTL) to 30 seconds.
C. Use a global table within Amazon DynamoDB so data can be accessed in the two selected Regions.
D. Back up data from an Amazon DynamoDB table in the primary Region every 60 minutes and then write the data to Amazon S3. Use S3 cross-Region replication to copy the data from the primary Region to the disaster recovery Region. Have a script import the data into DynamoDB in a disaster recovery scenario.
E. Implement a hot standby model using Auto Scaling groups for the web and application layers across multiple Availability Zones in the Regions. Use zonal Reserved Instances for the minimum number of servers and On-Demand Instances for any additional resources.
F. Use Auto Scaling groups for the web and application layers across multiple Availability Zones in the Regions. Use Spot Instances for the required resources.

Show Suggested Answer

Suggested Answer: BCE 🗳️

by kalyan_krishna742020 at March 12, 2021, 2:59 a.m.

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kalyan_krishna742020

Highly Voted 3 years, 7 months ago

Ans: BCE

upvoted 23 times

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nimbus_00

Most Recent 6 months ago

Selected Answer: BCE

Looks right

upvoted 1 times

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TechX

2 years, 10 months ago

Selected Answer: BCE

No-brain, it's BCE

upvoted 1 times

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jj22222

3 years, 1 month ago

Selected Answer: BCE

bce - look right

upvoted 1 times

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shotty1

3 years, 3 months ago

Selected Answer: BCE

it is BCE

upvoted 1 times

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pititcu667

3 years, 3 months ago

Selected Answer: BCE

A will only move the dns after 1 hour so ..

upvoted 1 times

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AzureDP900

3 years, 5 months ago

B,C,E is perfect answer. The requirements can be achieved by using an Amazon DynamoDB database with a global table. DynamoDB is a NoSQL database so it fits the requirements. A global table also allows both reads and writes to occur in both Regions. For the web and application tiers Auto Scaling groups should be configured. Due to the 1-minute RTO these must be configured in an active/passive state. The best pricing model to lower price but ensure resources are available when needed is to use a combination of zonal reserved instances and on-demand instances. To failover between the Regions, a Route 53 failover routing policy can be configured with a TTL configured on the record of 30 seconds. This will mean clients must resolve against Route 53 every 30 seconds to get the latest record. In a failover scenario the clients would be redirected to the secondary site if the primary site is unhealthy.

upvoted 4 times

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