To view the schema of a Parquet file, you must use the DataFrameReader to load the Parquet data and call the .printSchema() method.

Correct syntax:

spark.read.parquet("events.parquet").printSchema()

This command loads the file metadata (without triggering a full read) and prints the column names, data types, and nullability information in a tree format.

Why the other options are incorrect:

A/D: SQL queries can’t directly introspect file schemas.

B: .show() displays data rows, not schema.