Qualcomm Data Engineer PySpark Interview Question

𝐐𝐮𝐚𝐥𝐜𝐨𝐦𝐦 𝐃𝐚𝐭𝐚𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐐𝐮𝐞𝐬𝐭𝐢𝐨𝐧𝐬
💡 Question:
You are given a PySpark DataFrame with a column named tags that contains comma-separated string

+---+---------------------+
| id| tags |
+---+---------------------+
| 1| "spark,hadoop,hive" |
| 2| "python,flask" |
| 3| "sql" |
+---+---------------------+

Task: Write PySpark code to transform this DataFrame so that each tag appears in its own row, along with the corresponding id, using split() and explode().


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Setting up and managing *Databricks* for big data analytics and machine learning.
Creating and orchestrating ETL pipelines with **Azure Data Factory**.
Writing efficient queries and managing databases with **SQL**.
Leveraging *Python* for data transformation and automation.
Building interactive dashboards and visualizations using **Power BI**.

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