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

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

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

2. What does a Pearson correlation coefficient value of -0.9 imply about the relationship between two numerical variables?

A) A strong negative linear relationship
B) A weak positive relationship
C) No correlation
D) A moderate non-linear association

3. Which file formats are commonly used for hierarchical or nested data structures in data acquisition?
(Choose two)

A) XML
B) JSON
C) TSV
D) CSV

4. Which practices help ensure secure and effective execution of SQL queries in Python scripts?
(Choose all that apply)

A) Using string concatenation to insert variables into SQL
B) Employing parameterized statements for user-supplied data
C) Wrapping SQL commands in try-except blocks
D) Using string formatting to build SQL queries dynamically

5. Which method in a Python class is responsible for initializing the object's attributes at the time of creation?

A) __getattr__()
B) __main__()
C) __str__()
D) __init__()

Solutions: