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

1. Why might using a pie chart to represent category proportions be less effective than a bar chart?

A) Pie charts display individual data points more clearly
B) Bar charts are limited to one variable only
C) Human perception is less accurate at judging angles than lengths
D) Pie charts cannot be created using Seaborn

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

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

3. Which SQL command should a data analyst use to modify existing records in a database table based on specific conditions?

A) INSERT
B) CREATE
C) UPDATE
D) SELECT

4. Which refinements are typically used to enhance clarity and presentation quality in visualizations?
(Choose two)

A) Adding descriptive axis labels
B) Disabling grid lines in all cases
C) Avoiding color entirely
D) Customizing tick labels

5. 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 overlays multiple plots in the same figure without axes
C) It creates a 3D surface plot using pandas
D) It configures multiple plots in a grid layout within a single figure

Solutions: