DA0-002 Data Concepts and Environments Practice Question
Exhibit
Refer to the exhibit.
Exhibit:
{
"type": "object",
"properties": {
"customerId": { "type": "integer" },
"name": { "type": "string" },
"orders": {
"type": "array",
"items": {
"type": "object",
"properties": {
"orderId": { "type": "integer" },
"total": { "type": "number" }
}
}
}
}
}Refer to the exhibit. Which data concept does this exhibit best represent?
⚠ Common exam trap
CompTIA often tests the distinction between a JSON schema (a structural definition with type constraints) and a raw JSON object (just data), leading candidates to mistake the schema for a simple data dictionary or ERD.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
JSON schema
The exhibit shows a structured data format with key-value pairs, arrays, and nested objects enclosed in curly braces, which is the standard syntax for JSON (JavaScript Object Notation). A JSON schema defines the structure, data types, and validation rules for JSON data, making it the best fit for the exhibit. The presence of fields like "name", "age", and "address" with specific types (e.g., string, integer) confirms this is a schema definition, not a generic data representation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Entity relationship diagram
Why it's wrong here
An ER diagram is a visual representation of entities and relationships.
- ✓
JSON schema
Why this is correct
The exhibit is a JSON schema that validates the structure of JSON data.
- ✗
Data quality rule
Why it's wrong here
A data quality rule would specify conditions for valid data, not just structure.
- ✗
Data dictionary
Why it's wrong here
A data dictionary is a structured definition of data elements, not a JSON schema.
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