Databricks Certified Machine Learning Associate Practice Mode

Community Discussion

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  - The correct method to randomly split a Spark DataFrame into training and test sets is by using the randomSplit method. This method allows you to specify the proportions for the split as a list of weights and returns multiple DataFrames according to those weights. This is directly intended for splitting DataFrames randomly and is the appropriate choice for preparing data for training and testing in machine learning workflows. Reference: Apache Spark DataFrame API documentation (DataFrame Operations: randomSplit).