Which of the following code blocks concatenates rows of DataFrames transactionsDf and transactionsNewDf, omitting any duplicates?
Correct Answer: B
Explanation DataFrame.unique() and DataFrame.concat() do not exist and union() is not a method of the SparkSession. In addition, there is no union option for the join method in the DataFrame.join() statement. More info: pyspark.sql.DataFrame.union - PySpark 3.1.2 documentation Static notebook | Dynamic notebook: See test 2
