Exam AZ-220 topic 1 question 7 discussion

Actual exam question from Microsoft's AZ-220

Question #: 7
Topic #: 1

You plan to deploy an Azure IoT hub.
The IoT hub must support the following:
✑ Three Azure IoT Edge devices
✑ 2,500 IoT devices
Each IoT device will spend a 6 KB message every five seconds.
You need to size the IoT hub to support the devices. The solution must minimize costs.
What should you choose?

A. one unit of the S1 tier
B. one unit of the B2 tier
C. one unit of the B1 tier
D. one unit of the S3 tier

Show Suggested Answer

Suggested Answer: D 🗳️
2500* 6 KB * 12 = 180,000 KB/minute = 180 MB/Minute.
B3, S3 can handle up to 814 MB/minute per unit.
Incorrect Answers:
A, C: B1, S1 can only handle up to 1111 KB/minute per unit
B: B2, S2 can only handle up to 16 MB/minute per unit.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-scaling

by ipindado2020 at Nov. 21, 2020, 9:58 a.m.

Comments

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tedsi

Highly Voted 4 years, 5 months ago

Easy way to think of this: can't be Basic tiers due to Edge requirement and based on data flow has to be S3

upvoted 6 times

pdeng

2 years, 4 months ago

86.4m msg/day = 2.5k devices * ⌈6kb / 4kb/unit⌉ * (24h * 60min * (60sec / 5sec)) S2: (6 million messages/day per unit) S3: (300 million messages/day per unit)

upvoted 1 times

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BillBaits

Most Recent 3 years, 6 months ago

No answer is correct, since the maximum supported message size is 4kb https://azure.microsoft.com/en-us/pricing/details/iot-hub/

upvoted 2 times

longnt

2 years, 10 months ago

Kamilelo is corrected. 6KB message will be count as two per "message meter size" limit.

upvoted 1 times

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Kamilelo

3 years, 4 months ago

D is correct. In link above you have "Message meter size" not "Maximum message size"

upvoted 6 times

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ipindado2020

4 years, 5 months ago

D is ok

upvoted 4 times

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