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

Which method is commonly used to handle missing numerical data in a dataset?

• A.Multiplying all missing values by zero
• B.Replacing with text labels
• C.Dropping all columns
• D.Filling with the mean or median

What distinguishes structured data from unstructured data in the context of data modeling and storage?

• A.Unstructured data contains only numeric values
• B.Structured data cannot be stored in databases
• C.Structured data follows a consistent schema or format
• D.Unstructured data cannot be stored or analyzed

What is the recommended Python library to connect and extract tabular data directly from an Excel file?

• A.sqlite3
• B.matplotlib
• C.csv
• D.openpyxl

What is the main reason to remove duplicate records before performing analysis?

• A.It avoids converting data to JSON format
• B.It ensures training data is intentionally overfitted
• C.It helps increase sample size
• D.It reduces redundancy that can skew statistical metrics

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 sum of all values in the dataset
• D.The most frequently occurring value