100% Free Python Institute PCED-30-01 Practice Test Questions and Answers 2026

Your dataset has multiple variables with different scales and units, making it challenging to compare them directly. You need to synthesize this data into a digestible report for decision-makers who are not data scientists. What should be your first step in preprocessing the data?

In Python, which of the following methods is not a common statistical approach to identify outliers within a dataset?

When creating a dashboard using Tableau, which option allows you to integrate real-time Python code execution into your dashboard?

You have a DataFrame with a 'date' column in string format ('YYYY-MM-DD'). How would you convert this column to Pandas datetime format?

You notice that the transformation phase of the ETL process is extremely slow. You suspect that the issue lies in the inefficient handling of a large DataFrame in Pandas. Which of the following should be your first step to troubleshoot?