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Q55 Single choice

An engineer has a large ORC file located at/file/test_data.orcand wants to read only specific columns to reduce memory usage.

Which code fragment will select the columns, i.e.
,col1,col2, during the reading process?

A
spark.read.orc("/file/test_data.orc").filter("col1 = 'value' ").select("col2")
B
spark.read.format("orc").select("col1", "col2").load("/file/test_data.orc")
C
spark.read.orc("/file/test_data.orc").selected("col1", "col2")
D
spark.read.format("orc").load("/file/test_data.orc").select("col1", "col2")

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