Hadoop - Performance Tuning
What will be the output schema when reading an Avro file with embedded schema using PySpark's avro package?
What will be the output schema when reading an Avro file with embedded schema using PySpark's avro package?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Avro schema handling
Avro files contain embedded schema, so PySpark can infer the schema automatically when reading.Step 2: Eliminate incorrect options
Manual schema specification is optional, schema is not empty, and file name does not determine schema.Final Answer:
Schema is inferred from the embedded Avro schema -> Option AQuick Check:
Avro embedded schema = automatic inference [OK]
Quick Trick: Avro files carry schema for automatic reading [OK]
Common Mistakes:
- Forcing manual schema
- Assuming empty schema
- Using file name for schema inference
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