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AZ-900Chapter 91 of 138Objective 2.4

Azure Data Lake Storage

This chapter covers Azure Data Lake Storage. AZ-900 tests under 2.4.

6 min read
Intermediate
Updated Aug 20, 2026
Reviewed by Johnson Ajibi· Senior Network & Security Engineer · MSc IT Security

A simple way to picture Azure Data Lake Storage

A Massive Data Lake

A traditional data warehouse is structured for specific queries. A data lake is a massive storage area for raw data of any type, to be analyzed flexibly later.

How It Actually Works

Data Lake Storage stores massive amounts of unstructured and structured data, supporting big-data analytics without the rigid structure of traditional warehouses. It's optimized for analytics workloads.

Walk-Through

1

Create a Data Lake Storage account

A storage account is provisioned.

2

Load data

Raw data of any type is loaded into the lake.

3

Analyze

Analytics tools query and analyze the data flexibly.

What This Looks Like on the Job

An organization stores years of raw log files in a data lake, then analyzes them for patterns without pre-structuring the data.

How AZ-900 Actually Tests This

Objective 2.4 expects understanding of Data Lake as unstructured big-data storage.

Key Takeaways

Data Lake stores massive amounts of data flexibly.

Optimized for analytics.

Supports unstructured and structured data.

Frequently Asked Questions

What is Azure Data Lake Storage?

It's a storage service optimized for big-data analytics, storing massive amounts of structured and unstructured data flexibly.

Terms Worth Knowing

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