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Exam AI-100 topic 1 question 7 discussion

Actual exam question from Microsoft's AI-100

Question #: 7
Topic #: 1

Your company recently deployed several hardware devices that contain sensors.
The sensors generate new data on an hourly basis. The data generated is stored on-premises and retained for several years.
During the past two months, the sensors generated 300 GB of data.
You plan to move the data to Azure and then perform advanced analytics on the data.
You need to recommend an Azure storage solution for the data.
Which storage solution should you recommend?

A. Azure Queue storage
B. Azure Cosmos DB
C. Azure Blob storage
D. Azure SQL Database

Show Suggested Answer

Suggested Answer: C 🗳️
References:
https://docs.microsoft.com/en-us/azure/architecture/data-guide/technology-choices/data-storage

by hokigir at June 15, 2020, 10:57 a.m.

Comments

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Ramozz

Highly Voted 4 years, 11 months ago

Since the data is collected from sensors, maybe it's indicating that the greater part of the data is unstructured and thus, blob maybe the safer option

upvoted 9 times

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aitruthseeker

Highly Voted 4 years, 5 months ago

No where it says the sensors generated structured tabular data. Sensors usually produce logs of data or files of data that could contain JSON, XML, etc. Azure BLOB seems to be the appropriate storage option here.

upvoted 6 times

Cornholioz

4 years, 5 months ago

The question is vague. Sensors generate several types of data. Could very well be streaming data that is structured and stored in a SQL database. Agree it doesn't say structured tabular data... it doesn't say it is unstructured either. BLOB or Cosmos or even SQL can be used as the target store. I'll go with Blob, but the question is definitely vague.

upvoted 1 times

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rveney

Most Recent 2 years ago

the most suitable Azure storage solution for storing and analyzing the sensor data would be C. Azure Blob storage.

upvoted 1 times

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dev2dev

2 years, 5 months ago

I will go with blob storage and then do analytics in databricks. I can implement lambda architecture for performing a typical advance analytics solution. CosmosDB is good for high throughput data ingestion but again we need to move data to more cheaper storage which will be again blob storage. SQL Server is not good for live analytics. Queue storage is funny option which can be ignored.

upvoted 1 times

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Golur

3 years, 11 months ago

Azure Blob Storage - as the data should be retained for several years.

upvoted 1 times

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Jeb

4 years, 2 months ago

The correct answer is B in terms of analytics that requires NoSQL DB.

upvoted 2 times

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nohaph

4 years, 5 months ago

The answer is correct Blob storage is ideal for: Serving images or documents directly to a browser. Storing files for distributed access. Streaming video and audio. Storing data for backup and restore, disaster recovery, and archiving. Storing data for analysis by an on-premises or Azure-hosted service. https://docs.microsoft.com/en-us/azure/storage/common/storage-introduction

upvoted 1 times

fdlsys

4 years, 4 months ago

So, nearly everything, except what is specified as the only clear requirement: "perform advanced analytics on the data". Blob/DataLake2 do not cater for real time analytics / advanced querying. The answer should be Cosmos DB.

upvoted 2 times

mingchieh2

4 years, 2 months ago

the question never says it needs real time analysis

upvoted 1 times

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Nova077

4 years, 9 months ago

Strange!! The url states that Azure Blob is not optimized for Analytics.' https://docs.microsoft.com/en-us/azure/architecture/data-guide/technology-choices/data-storage

upvoted 2 times

GraceCyborg

4 years, 6 months ago

data lake is blob storage

upvoted 2 times

dev2dev

2 years, 5 months ago

blob storage is not data lake storage

upvoted 1 times

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xsify

4 years, 10 months ago

Data Lake would be better choice, but in this case it's Azure storage because it's optimized for analytics ("... you plan to do advanced analytics on the data."), see the links.

upvoted 1 times

dev2dev

2 years, 5 months ago

data lake storage is not even in the option.

upvoted 1 times

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samok

4 years, 11 months ago

This question is very vague, it does not mention any requirements other than size. If it said to minimize cost, then Blob storage is correct. But like this, all the answers are technically correct...

upvoted 2 times

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fred777

4 years, 12 months ago

I suppose they mention Blob Storage because Azure Data Lake Storage Gen2 is based on Blob Storage

upvoted 2 times

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hokigir

5 years ago

Why blob? At best should be Data Lake. I think here should be Cosmos DB or Azure SQL Database.

upvoted 3 times

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