Databricks-Machine-Learning-Associate: Databricks Certified Machine Learning Associate Spark Practice Questions

A machine learning engineer would like to develop a linear regression model with Spark ML to predict the price of a hotel room. They are using the Spark DataFrametrain_dfto train the model. The Spark DataFrametrain_dfhas the following schema: The machine learning engineer shares the following code block: Which of the following changes does the machine learning engineer need to make to complete the task?

• AA. They need to call the transform method on train df
• BB. They need to convert the features column to be a vector
• CC. They do not need to make any changes
• DD. They need to utilize a Pipeline to fit the model
• EE. They need to split thefeaturescolumn out into one column for each feature

Which statement describes a Spark ML transformer?

• AA. A transformer is an algorithm which can transform one DataFrame into another DataFrame
• BB. A transformer is a hyperparameter grid that can be used to train a model
• CC. A transformer chains multiple algorithms together to transform an ML workflow
• DD. A transformer is a learning algorithm that can use a DataFrame to train a model