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

1. Which methods are typically used to assess relationships between variables in exploratory data analysis?
(Choose two)

A) Histogram analysis
B) Correlation matrix
C) Box plots
D) Scatter plots

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

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

3. When analyzing a dataset, which of the following functions would best help detect skewness or asymmetry in the data distribution?

A) sum()
B) mean()
C) std()
D) skew()

4. 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) install pip pandas
C) python get pandas
D) python install pandas

5. What is the most appropriate way to ensure that a column used as a foreign key contains only valid references to a parent DataFrame in Pandas?

A) Use df.sort_values() to sort both columns before merging
B) Use df.merge() with how='outer'
C) Use .isin() to compare the foreign key column against the parent key column
D) Use df.dropna() on the foreign key column

Solutions: