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 healthcare organization stores patient records in a relational database table with fixed columns for PatientID, Name, and DateOfBirth. Additionally, they store clinical notes as free-form text files for each patient visit. Which statement correctly classifies these data types?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Patient records are structured data, and clinical notes are unstructured data.
Patient records stored in a relational database table with fixed columns (PatientID, Name, DateOfBirth) conform to a predefined schema, making them structured data. Clinical notes stored as free-form text files lack a fixed schema or organization, which classifies them as unstructured data. Option B correctly identifies this distinction.
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.
✗
Both patient records and clinical notes are examples of unstructured data.
Why it's wrong here
Patient records have a fixed schema (columns), so they are structured, not unstructured.
✓
Patient records are structured data, and clinical notes are unstructured data.
Why this is correct
Patient records have defined columns (structured), while clinical notes are free-form text (unstructured).
Related concept
Read the scenario before looking for a memorised answer.
✗
Both patient records and clinical notes are examples of structured data.
Why it's wrong here
Clinical notes have no fixed schema, so they are not structured.
✗
Patient records are unstructured data, and clinical notes are semi-structured data.
Why it's wrong here
Patient records are structured (fixed schema), not unstructured. Clinical notes are unstructured, not semi-structured.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'free-form text' with semi-structured data (e.g., JSON or XML), but semi-structured data has tags or key-value pairs, whereas free-form text has no inherent structure at all.
Detailed technical explanation
How to think about this question
Structured data relies on a rigid schema (e.g., SQL table columns with data types like INT or VARCHAR), enabling efficient indexing and querying via SQL. Unstructured data, such as plain text files, has no schema and often requires full-text search or natural language processing (NLP) for analysis. In healthcare, structured data supports fast retrieval of demographics, while unstructured clinical notes require specialized tools like Azure Cognitive Search for insights.
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: Patient records are structured data, and clinical notes are unstructured data. — Patient records stored in a relational database table with fixed columns (PatientID, Name, DateOfBirth) conform to a predefined schema, making them structured data. Clinical notes stored as free-form text files lack a fixed schema or organization, which classifies them as unstructured data. Option B correctly identifies this distinction.
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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