Databricks Certified Associate Developer for Apache Spark — Question 96

The code block shown below contains an error. The code block is intended to create a single-column DataFrame from Python list years which is made up of integers. Identify the error.

Code block:

spark.createDataFrame(years, IntegerType)

Answer options

• A. The column name must be specified.
• B. The years list should be wrapped in another list like [years] to make clear that it is a column rather than a row.
• C. There is no createDataFrame operation in spark.
• D. The IntegerType call must be followed by parentheses.
• E. The IntegerType call should not be present — Spark can tell that list years is full of integers.

Correct answer: D

Explanation

The correct answer is D because the IntegerType function must be called with parentheses to be properly recognized in the createDataFrame method. Option A is incorrect because the column name is not required for creating a DataFrame from a list. Option B is also incorrect as the list does not need to be wrapped for this operation. Option C is false as createDataFrame is a valid method in Spark, and Option E is misleading since specifying the data type can still be necessary for clarity.