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

1. Which techniques can be used to select a subset of rows and columns from a DataFrame using labels?
(Choose two)

A) df.loc[2:7, ['col1', 'col2']]
B) df['col1', 'col2']
C) df.iloc[0:5, 'col2']
D) df.loc[:, 'col1']

2. Which actions are considered best practices when managing datasets in Python using pandas?
(Choose two)

A) Use .info() to understand dataset structure
B) Always convert all columns to strings
C) Replace missing values with hardcoded zeros without analysis
D) Use .describe() for summary statistics

3. Which operations are valid and commonly used on Python lists during data transformation tasks?
(Choose two)

A) Index-based iteration
B) Slicing
C) Append
D) Key-value mapping

4. Which packages are most commonly used together in a data science workflow for data manipulation and visualization?
(Choose two)

A) NumPy
B) flask
C) Pygame
D) pandas

5. Which methods can be used to validate data types and structure in a Pandas DataFrame?
(Choose two)

A) df.memory_usage()
B) df.to_csv()
C) df.info()
D) df.dtypes

Solutions: