20+ practice questions focused on Describe core data concepts — one of the most tested topics on the Microsoft Azure Data Fundamentals DP-900 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Describe core data concepts PracticeA company stores customer names, addresses, and order history. They need to perform complex queries that join customer and order data. Which type of data store is most appropriate for this scenario?
Explanation: A relational database (e.g., Azure SQL Database) is most appropriate because the scenario requires joining customer and order data via complex queries. Relational databases enforce a fixed schema with tables, primary keys, and foreign keys, enabling efficient JOIN operations using SQL. This structure ensures data integrity and supports ACID transactions, which are essential for accurate order history and customer records.
A retail company captures real-time sensor data from IoT devices to detect anomalies and predict equipment failures. The data must be processed immediately as it arrives. Which type of data processing workload best describes this scenario?
Explanation: B is correct because streaming processing is designed for continuous, real-time data ingestion and immediate analysis, which matches the requirement to process sensor data as it arrives. Technologies like Azure Stream Analytics or Apache Kafka enable low-latency processing of IoT data streams to detect anomalies and predict failures without batching.
Which classification of data describes information that has a fixed schema and is organized into rows and columns, such as data found in a relational database table?
Explanation: Structured data is defined by a fixed schema, where each data element adheres to a predefined data type and relationship, organized into rows and columns. This is the fundamental model of a relational database table, such as those in Azure SQL Database or SQL Server, where constraints like primary keys and foreign keys enforce the schema.
A logistics company stores shipping waybill data as JSON documents. Each document contains fields like 'shipmentId', 'destination', and 'items', but the number of items and the fields within each item can vary between shipments. Which category best describes this type of data?
Explanation: JSON documents with varying fields and nested structures like 'items' that differ between shipments are a classic example of semi-structured data. Unlike structured data with a fixed schema, semi-structured data uses tags or markers (like JSON key-value pairs) to separate data elements, allowing for flexibility in the number and type of fields per record. This aligns with the DP-900 definition of semi-structured data, which includes formats such as JSON, XML, and Parquet.
A consulting firm collects client information in two forms: a spreadsheet with columns for Name, Address, and Phone Number, and audio recordings of client meetings. Which of the following statements correctly categorizes these data types?
Explanation: The spreadsheet data with columns for Name, Address, and Phone Number has a predefined schema (rows and columns), making it structured data. Audio recordings are binary files with no inherent schema or organization, fitting the definition of unstructured data. Option C correctly pairs these classifications.
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Practice all Describe core data concepts questions1. Baseline your knowledge
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2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Describe core data concepts questions on the DP-900 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Describe core data concepts is tested as part of the Microsoft Azure Data Fundamentals DP-900 blueprint. Practicing with targeted Describe core data concepts questions ensures you can handle any format or difficulty that appears.
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