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Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Sample Questions:

1. Why is min-max scaling applied before using algorithms like K-Nearest Neighbors or SVM?

A) To convert strings into numeric values
B) To make all features interpretable as binary values
C) To compress all values into integers
D) To prevent features with larger scales from dominating distance calculations

2. What is the main advantage of using Seaborn over Matplotlib when creating complex statistical visualizations in Python?

A) Seaborn works exclusively with NumPy arrays
B) Seaborn requires no data preprocessing for missing values
C) Seaborn automatically saves plots as image files
D) Seaborn provides high-level abstractions for attractive and informative graphics

3. What is the correct sequence to connect to a database and execute a query using the sqlite3 module in Python?

A) Commit → Connect → Execute → Close
B) Connect → Commit → Execute → Close
C) Connect → Execute → Commit → Close
D) Execute → Connect → Commit → Close

4. Which practices are considered part of professional Python scripting standards?
(Choose two)

A) Including in-line comments and docstrings
B) Using consistent indentation and naming conventions
C) Avoiding error handling to keep code clean
D) Avoiding use of modules and libraries

5. Which command should a data analyst use to install the pandas library in a Python environment using the Python Package Index?

A) pip install pandas
B) python install pandas
C) python get pandas
D) install pip pandas

Solutions: