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

1. Which type of chart is most appropriate when comparing the distribution of a numerical variable across multiple categories?

A) Box plot
B) Line chart
C) Pie chart
D) Scatter plot

2. When analyzing a dataset of customer ages, you calculate the mean, median, and mode. What does it indicate if all three values are approximately equal?

A) The dataset is uniformly distributed
B) The dataset contains outliers
C) The dataset is positively skewed
D) The dataset has a normal distribution

3. What is the primary purpose of using annotations in a data visualization?

A) To highlight important data points and provide contextual information
B) To replace the need for axes
C) To ensure faster rendering in large datasets
D) To enhance interactivity in static plots

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

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

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

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

Solutions: