Free Python Institute PCAD-31-02 Exam Dumps Questions & Answers

When creating a line chart with Matplotlib, which function is most appropriate to add a text label at a specific data point?

• A.  plt.title()
• B.  plt.annotate()
• C.  plt.legend()
• D.  plt.xlabel()

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

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

When performing bootstrapping on a dataset with 500 observations, what is a typical procedure?

• A.  Scaling all values between 0 and 1 before resampling
• B.  Generating multiple datasets of the same size by randomly sampling with replacement
• C.  Creating samples by removing all duplicates
• D.  Drawing one sample and calculating the mean only once

Which characteristics are typically associated with supervised learning algorithms?
(Choose two)

• A.  They require labeled training data
• B.  They are useful for regression and classification tasks
• C.  They automatically detect outliers
• D.  They work only with numerical features

What does the standard deviation of a dataset represent in the context of statistical analysis?

• A.  The number of outliers in the dataset
• B.  The average squared distance from the mean
• C.  The most frequently occurring value
• D.  The sum of all values in the dataset