DP-203 Data Storage Solutions — Questions and Answers

Question 1: What is the primary use case for Azure Blob Storage?

Storing structured data
Storing unstructured data such as text and binary data (Correct answer)
Running SQL queries
Hosting web applications

Correct answer: Storing unstructured data such as text and binary data

Azure Blob Storage is an object storage solution specifically designed to store massive amounts of unstructured data. This includes various file types like text, images, videos, and other binary data, making it ideal for data lakes, backups, and media storage solutions. It is not optimized for structured data, SQL queries, or direct web application hosting.

Question 2: What is a key feature of Azure Data Lake Storage Gen2?

It only supports SQL databases.
It provides built-in hierarchical namespace. (Correct answer)
It is limited to 10 GB of storage.
It cannot integrate with Azure services.

Correct answer: It provides built-in hierarchical namespace.

Azure Data Lake Storage Gen2 (ADLS Gen2) is built upon Azure Blob Storage and uniquely offers a hierarchical namespace. This feature allows data to be organized in a file system-like structure, which is crucial for efficient data management and compatibility with big data analytics frameworks like Hadoop, enabling better performance and organization.

Question 3: Which feature of Azure SQL Database allows for automatic scaling based on workload demands?

Elastic Pools (Correct answer)
Data Warehousing
Managed Instance
Geo-Replication

Correct answer: Elastic Pools

Azure SQL Database Elastic Pools provide a cost-effective solution for managing and scaling multiple databases with varying and unpredictable usage demands. They allow databases to share a set amount of resources, enabling automatic scaling within the pool to meet workload fluctuations without over-provisioning for individual databases. This ensures optimal resource utilization and cost efficiency.

Question 4: What type of consistency model does Azure Cosmos DB offer?

Strong consistency only
Eventual consistency only
Multiple consistency models (Correct answer)
No consistency models

Correct answer: Multiple consistency models

Azure Cosmos DB is a globally distributed, multi-model database service that offers a unique choice of five well-defined consistency models: Strong, Bounded Staleness, Session, Consistent Prefix, and Eventual. This flexibility allows developers to select the optimal balance between consistency, availability, and latency for their specific application requirements, catering to diverse workload needs.

Question 5: What type of data does Azure Table Storage primarily store?

Relational data
Key-value pairs (Correct answer)
File data
Graph data

Correct answer: Key-value pairs

Azure Table Storage is a NoSQL data store designed for storing large amounts of structured, non-relational data. It primarily stores data as key-value pairs, where each row is uniquely identified by a partition key and a row key. This structure makes it highly efficient for applications requiring fast access to simple, schema-less data structures.

DP-203 Data Storage Solutions

What is the primary use case for Azure Blob Storage?