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Exam AWS Certified Solutions Architect - Professional topic 1 question 1005 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 1005
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

A company recently deployed an application on AWS. The application uses Amazon DynamoDB. The company measured the application load and configured the RCUs and WCUs on the DynamoDB table to match the expected peak load. The peak load occurs once a week for a 4-hour period and is double the average load. The application load is close to the average load for the rest of the week. The access pattern includes many more writes to the table than reads of the table.

A solutions architect needs to implement a solution to minimize the cost of the table.

Which solution will meet these requirements?

  • A. Use AWS Application Auto Scaling to increase capacity during the peak period. Purchase reserved RCUs and WCUs to match the average load.
  • B. Configure on-demand capacity mode for the table.
  • C. Configure DynamoDB Accelerator (DAX) in front of the table. Reduce the provisioned read capacity to match the new peak load on the table.
  • D. Configure DynamoDB Accelerator (DAX) in front of the table. Configure on-demand capacity mode for the table.
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Suggested Answer: A 🗳️
by YOIAN at Dec. 20, 2022, 10:08 p.m.
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ccort
Highly Voted 2 years, 3 months ago
Selected Answer: A
On demand capacity is much more expensive than provisioned/reserved capacity
upvoted 6 times
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Ebi
Most Recent 1 year, 2 months ago
Selected Answer: A
Answer is A
upvoted 1 times
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Ebi
1 year, 2 months ago
Answer is A
upvoted 1 times
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ggrodskiy
1 year, 10 months ago
Correct B
upvoted 2 times
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Sudeepshiv
1 year, 11 months ago
Selected Answer: B
On demand will be cost effective in this case
upvoted 1 times
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dev112233xx
2 years ago
Selected Answer: B
On-demand is better for "unpredictable workloads whose traffic can spike"
upvoted 1 times
vn_thanhtung
1 year, 8 months ago
The peak load occurs once a week for a 4-hour period and is double the average load
upvoted 1 times
...
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Arunava1
2 years, 4 months ago
why not B? how A gives more cost savings than B?
upvoted 1 times
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syaldram
2 years, 4 months ago
Selected Answer: A
Yea DAX doesn't make sense for write heavy loads. I will go with A!
upvoted 2 times
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YOIAN
2 years, 4 months ago
A is the correct answer, C would be more suitable for read-heavy application
upvoted 4 times
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