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

1. Which of the following best describes the purpose of the plt.subplot() function in Matplotlib?

A) It links Matplotlib with Seaborn's grid styling
B) It creates a 3D surface plot using pandas
C) It overlays multiple plots in the same figure without axes
D) It configures multiple plots in a grid layout within a single figure

2. What may occur if a model is evaluated using the same data it was trained on?

A) Overgeneralization
B) Underfitting
C) Data leakage
D) Overfitting

3. Which metric is most appropriate for evaluating the accuracy of a classification model?

A) Precision
B) R-squared
C) Mean squared error
D) Confusion matrix

4. When merging two Pandas DataFrames using a common key, which parameters are essential to ensure accurate and conflict-free results?
(Choose two)

A) ignore_index
B) dropna
C) on
D) suffixes

5. How would you extract the last three rows of a DataFrame df using position-based indexing?

A) df[-3]
B) df.tail(3)
C) df.loc[-3:]
D) df.iloc[-3:]

Solutions: