Free Databricks-Certified-Associate-Developer-for-Apache-Spark-3.0 Exam Questions - Databricks Databricks-Certified-Associate-Developer-for-Apache-Spark-3.0 Exam

Which of the following code blocks returns a single-column DataFrame of all entries in Python list throughputRates which contains only float-type values ?

The code block shown below should return a DataFrame with all columns of DataFrame transactionsDf, but only maximum 2 rows in which column productId has at least the value 2. Choose the

answer that correctly fills the blanks in the code block to accomplish this.

transactionsDf.__1__(__2__).__3__

Which of the following code blocks returns a single-row DataFrame that only has a column corr which shows the Pearson correlation coefficient between columns predError and value in DataFrame

transactionsDf?

Which of the following code blocks applies the Python function to_limit on column predError in table transactionsDf, returning a DataFrame with columns transactionId and result?

Which of the following code blocks reads in the JSON file stored at filePath, enforcing the schema expressed in JSON format in variable json_schema, shown in the code block below?

Code block:

1. json_schema = """

2. {"type": "struct",

3. "fields": [

4. {

5. "name": "itemId",

6. "type": "integer",

7. "nullable": true,

8. "metadata": {}

9. },

10. {

11. "name": "supplier",

12. "type": "string",

13. "nullable": true,

14. "metadata": {}

15. }

16. ]

17. }

18. """