DP-900 Describe core data concepts Practice Question
This DP-900 practice question tests your understanding of describe core data concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A retail company stores customer transaction data in a relational database. Each transaction is recorded with a fixed schema including TransactionID, CustomerID, ProductID, Quantity, and TotalAmount. Which type of data does this represent?
Why wrong: Unstructured data has no predefined schema or data model, such as free-form text or media files. Transaction data with a fixed schema is the opposite.
B
Semi-structured data
Why wrong: Semi-structured data has some structure, like tags or key-value pairs, but not a rigid schema. A relational table with fixed columns is fully structured.
C
Structured data
Structured data conforms to a predefined schema, typically stored in rows and columns in a relational database. The fixed schema of TransactionID, CustomerID, etc., makes this structured data.
D
Binary data
Why wrong: Binary data refers to raw byte sequences, often for files like images or executables. Relational transaction data is not stored as binary blobs.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Structured data
Option C is correct because the data conforms to a fixed schema with defined columns (TransactionID, CustomerID, ProductID, Quantity, TotalAmount) and data types, which is the defining characteristic of structured data. In a relational database, this schema enforces consistency and allows for efficient querying using SQL, making it a classic example of structured data.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Unstructured data
Why it's wrong here
Unstructured data has no predefined schema or data model, such as free-form text or media files. Transaction data with a fixed schema is the opposite.
✗
Semi-structured data
Why it's wrong here
Semi-structured data has some structure, like tags or key-value pairs, but not a rigid schema. A relational table with fixed columns is fully structured.
✓
Structured data
Why this is correct
Structured data conforms to a predefined schema, typically stored in rows and columns in a relational database. The fixed schema of TransactionID, CustomerID, etc., makes this structured data.
Related concept
Read the scenario before looking for a memorised answer.
✗
Binary data
Why it's wrong here
Binary data refers to raw byte sequences, often for files like images or executables. Relational transaction data is not stored as binary blobs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'structured data' with 'semi-structured data' because both have some organization, but the key differentiator is the rigid, predefined schema enforced by the relational database versus the flexible, self-describing schema of semi-structured formats like JSON or XML.
Detailed technical explanation
How to think about this question
Structured data in a relational database is stored in tables with rows and columns, where each column has a specific data type (e.g., INT, DECIMAL) and constraints (e.g., PRIMARY KEY, FOREIGN KEY). This schema ensures data integrity and enables ACID transactions, which are critical for retail transaction processing where consistency (e.g., accurate inventory updates) must be maintained across concurrent operations.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-900 question in full detail.
Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Structured data — Option C is correct because the data conforms to a fixed schema with defined columns (TransactionID, CustomerID, ProductID, Quantity, TotalAmount) and data types, which is the defining characteristic of structured data. In a relational database, this schema enforces consistency and allows for efficient querying using SQL, making it a classic example of structured data.
What should I do if I get this DP-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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