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 company stores customer contact information in a table with columns for CustomerID, Name, Email, and Phone. They also store customer support chat transcripts as plain text files. Which of the following 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
✓
Customer contact information is structured; chat transcripts are unstructured
Customer contact information stored in a table with columns like CustomerID, Name, Email, and Phone is structured data because it has a fixed schema with rows and columns. Chat transcripts stored as plain text files have no predefined schema or organization, making them unstructured data. Therefore, option C correctly classifies the contact info as structured and the chat transcripts as unstructured.
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 are structured data
Why it's wrong here
Chat transcripts are not structured; they lack a fixed schema.
✗
Customer contact information is structured; chat transcripts are semi-structured
Why it's wrong here
Chat transcripts are unstructured, not semi-structured. Semi-structured data has tags or markers to separate data elements (e.g., JSON).
✓
Customer contact information is structured; chat transcripts are unstructured
Why this is correct
The table has a fixed schema (structured), while chat transcripts are free text (unstructured).
Related concept
Read the scenario before looking for a memorised answer.
✗
Both are semi-structured
Why it's wrong here
The table is structured, not semi-structured. Semi-structured data does not require a fixed schema but has self-describing properties.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse semi-structured data (like JSON or XML) with unstructured data (like plain text), incorrectly classifying chat transcripts as semi-structured because they contain some implicit structure (e.g., timestamps or user names) when in fact they lack a formal schema or metadata tags.
Detailed technical explanation
How to think about this question
Structured data adheres to a rigid schema, often enforced by a relational database management system (RDBMS) like SQL Server, where each column has a defined data type (e.g., INT for CustomerID, NVARCHAR for Name). Unstructured data, such as plain text files, lacks a schema and is typically stored in blob storage or data lakes; it requires natural language processing (NLP) or full-text indexing to extract meaning. In real-world scenarios, chat transcripts might be stored in Azure Blob Storage and analyzed using 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: Customer contact information is structured; chat transcripts are unstructured — Customer contact information stored in a table with columns like CustomerID, Name, Email, and Phone is structured data because it has a fixed schema with rows and columns. Chat transcripts stored as plain text files have no predefined schema or organization, making them unstructured data. Therefore, option C correctly classifies the contact info as structured and the chat transcripts as unstructured.
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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