Exam AZ-220 topic 1 question 22 discussion

Actual exam question from Microsoft's AZ-220

Question #: 22
Topic #: 1

HOTSPOT
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You have an Azure subscription that contains the following Azure IoT hub:

• Name: Hub1
• Tier: S1
• Number of units: 14

The subscription has the tiers and unit costs shown in the following table.

You have 60 IoT devices that connect to Hub1. Each IoT device sends a single 1-KB message to Hub1 per second.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

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Suggested Answer:

by 123456789456789 at April 2, 2023, 3:29 p.m.

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kbronctjr

2 years ago

Is C correct? 60kb messages/min = 15 messages of 4 KB/min 15 * 60 devices * 60 min/h *24h/day = 1.296.000‬ msgs/day 1296000/400000 = ‭3,24‬. We could use as max 3 units before throtling

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kbronctjr

2 years ago

I think B is incorrrect: We need to handle 60 * 3600 *24 = ‭5.184.000‬ msgs/day 5184000/400000 = 12.96 -> we need at least 13 S1 units 13 S1 units is more expensive than 1 S2 unit

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Billy223

2 years, 1 month ago

For the first point. It is NO. according to theory for a size 1=> 400.000 messages/day and unit. So, in one hand we have 14 units x 400.000 messages/day and unit= 5.600.000 messages/day max. On the other hand, we have (60+5) meesages/devices and sec x 60 sec/min x 60 min/h x 24 h/day = 5.616.000 messages/day. That´s why I think it is NO. https://learn.microsoft.com/en-us/training/modules/examine-iot-hub-properties/2-iot-hub-tiers?ns-enrollment-type=learningpath&ns-enrollment-id=learn.wwl.implement-iot-device-communication-by-using-azure-iot-sdks

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hotwheelsinsf

2 years, 1 month ago

you might add some type of documentation llink on this

upvoted 1 times

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123456789456789

2 years, 2 months ago

Hello, I think the third option is not correct. Where could you find that it only sends one single 60kb per minute ?

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