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DP-900: Key Differences Explained between Delta Lake and Azure Data Lake Storage

By: Author Alex Lim

Posted on

Categories Exam

Learn the key features that distinguish Delta Lake from Azure Data Lake Storage. Prepare for the Microsoft DP-900 certification exam with this detailed explanation.

Table of Contents

Question

Which two features distinguish Delta Lake from Azure Data Lake Storage? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

A. support for batch data
B. schema enforcement
C. support for an Apache Spark runtime
D. transactional consistency
E. support for streaming data

Answer

B. schema enforcement
D. transactional consistency

Explanation

The two features that distinguish Delta Lake from Azure Data Lake Storage are:

B. Schema enforcement
D. Transactional consistency

Delta Lake is an open-source storage layer that brings reliability to data lakes. It provides ACID transactions, scalable metadata handling, and unifies streaming and batch data processing. Key features of Delta Lake that differentiate it from Azure Data Lake Storage include:

  1. Schema enforcement: Delta Lake ensures data integrity by enforcing schema on write, preventing data corruption and inconsistencies. Azure Data Lake Storage, on the other hand, does not enforce schema, as it is primarily a storage service.
  2. Transactional consistency: Delta Lake provides ACID (Atomicity, Consistency, Isolation, and Durability) transactions, ensuring data consistency and reliability. This allows for concurrent reads and writes without conflicts. Azure Data Lake Storage does not offer transactional consistency, as it focuses on storing large amounts of data.

Both Delta Lake and Azure Data Lake Storage support batch and streaming data (options A and E), making these options incorrect. Additionally, while Delta Lake integrates well with Apache Spark (option C), this is not a distinguishing feature compared to Azure Data Lake Storage, as Spark can read data from both storage systems.

Microsoft DP-900 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Microsoft DP-900 exam and earn Microsoft DP-900 certification.