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

1. Which chart types are commonly used to represent relationships between two numerical variables in Python-based visualizations?
(choose two)
Response:

A) Scatter plot
B) Histogram
C) Heatmap
D) Line chart

2. Which practices are essential to ensure a fair evaluation of a machine learning model's performance?
(Choose two)

A) Randomizing the test dataset labels
B) Training on the entire dataset including test records
C) Splitting data into training and test sets
D) Using cross-validation to assess generalizability

3. What is the primary reason for using parameterized queries instead of directly formatting SQL strings in Python?

A) To prevent SQL injection vulnerabilities
B) To allow dynamic table creation
C) To reduce the number of SQL statements
D) To simplify data encryption

4. Which techniques are most effective when designing reusable and testable functions in Python?
(Choose two)

A) Returning print statements instead of values
B) Creating large monolithic functions
C) Use of default parameters
D) Avoiding external state or side effects

5. What is the main purpose of defining a class when working with complex data structures in a Python-based analysis project?

A) To ensure all values are stored as plain strings
B) To avoid using loops and conditional logic
C) To encapsulate related data and behavior for better organization
D) To define global variables that persist across files

Solutions: