DA0-002 Data Concepts and Environments Practice Question
Exhibit
{
"schema": {
"type": "struct",
"fields": [
{ "name": "id", "type": "int", "nullable": false },
{ "name": "name", "type": "string", "nullable": true },
{ "name": "email", "type": "string", "nullable": true }
]
}
}Refer to the exhibit. An Avro schema is defined as shown. Which data design concept does this represent?
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
✓
Schema-on-write
Avro requires defining the schema before writing data, imposing structure at write time (schema-on-write). Schema-on-read would apply structure when reading, and schema-less design has no predefined schema.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Schema-on-read
Why it's wrong here
Schema-on-read applies structure when reading, not when writing.
- ✗
Schema-less design
Why it's wrong here
Schema-less means no schema enforced; Avro enforces a schema.
- ✗
Dynamic schema
Why it's wrong here
Dynamic schema evolves over time; Avro schema is static once defined.
- ✓
Schema-on-write
Why this is correct
Avro uses a predefined schema that is applied when data is written, typical of schema-on-write.
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