Exam AWS Certified Database - Specialty topic 1 question 189 discussion

Exam question from Amazon's AWS Certified Database - Specialty

Question #: 189
Topic #: 1

[All AWS Certified Database - Specialty Questions]

A company wants to build a new invoicing service for its cloud-native application on AWS. The company has a small development team and wants to focus on service feature development and minimize operations and maintenance as much as possible. The company expects the service to handle billions of requests and millions of new records every day. The service feature requirements, including data access patterns are well-defined. The service has an availability target of
99.99% with a milliseconds latency requirement. The database for the service will be the system of record for invoicing data.
Which database solution meets these requirements at the LOWEST cost?

A. Amazon Neptune
B. Amazon Aurora PostgreSQL Serverless
C. Amazon RDS for PostgreSQL
D. Amazon DynamoDB

Show Suggested Answer

Suggested Answer: D 🗳️

by mbar94 at Sept. 3, 2022, 5:37 a.m.

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Pranava_GCP

1 year, 9 months ago

Selected Answer: B

B. Amazon Aurora PostgreSQL Serverless -- SLA 99.99% for Aurora, https://aws.amazon.com/rds/aurora/sla/ while RDS with only 99.95%, https://aws.amazon.com/rds/sla/ -- invoicing data, this has to be relational database with SQL query capability. DynamoDB being key-value NoSQL service does not fit for this. -- minimize operations and maintenance as much as possible, Serverless could be a good fit. -- cost, RDS is cheaper than Aurora, however RDS with SLA 99.95% without meeting the availability requirement. Therefore B. Amazon Aurora PostgreSQL Serverless

upvoted 1 times

Pranava_GCP

1 year, 8 months ago

switching to D. Amazon DynamoDB. from below user case DynamoDB as a data store for an online shop which includes invoicing data. https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/data-modeling-online-shop.html

upvoted 1 times

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hogs

1 year, 10 months ago

Selected Answer: D

Because the SLA is 99.99

upvoted 2 times

JasonZhu

1 year, 8 months ago

The SLA of Aurora is 99.99% https://aws.amazon.com/rds/aurora/sla/

upvoted 1 times

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SeemaDataReader

2 years, 1 month ago

Selected Answer: B

As Invoicing will mostly use relational data and not NOSQL, so I wont go with Dynamodb. Aurora serverless is less costly and provides millisecond latency, availability of 99.99%. Capacity to process billions of records.

upvoted 3 times

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backbencher2022

2 years, 2 months ago

Selected Answer: D

Clearly DynamoDB because of millisecond latency and 99.99 availability SLA. RDS maximum SLA is between 99 to 99.5 only whereas DynamoDB could go between 99.99 to 99.999 https://aws.amazon.com/about-aws/whats-new/2018/06/amazon-dynamodb-announces-a-monthly-service-level-agreement/ https://aws.amazon.com/rds/sla/

upvoted 2 times

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