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Python Institute PCAD-31-02 Exam Syllabus Topics:

Section	Weight	Objectives
Exploratory Data Analysis
SQL and Data Management
Statistical Methods and Modeling
Data Visualization and Communication
Data Acquisition and Pre-Processing	29.2%

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Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Sample Questions (Q128-Q133):

NEW QUESTION # 128
What is the most appropriate way to ensure that a column used as a foreign key contains only valid references to a parent DataFrame in Pandas?

A. Use df.dropna() on the foreign key column
B. Use df.sort_values() to sort both columns before merging
C. Use .isin() to compare the foreign key column against the parent key column
D. Use df.merge() with how='outer'

Answer: C

NEW QUESTION # 129
Which Python control structures are commonly used for data filtering and iterative operations in real-world analytics tasks?
(Choose two)

A. decorators
B. match-case statements
C. list comprehensions
D. while loops

Answer: C,D

NEW QUESTION # 130
What is the main reason for using try-except blocks in a data analysis script that reads multiple files?

A. To automatically restart the script after execution
B. To gracefully handle runtime errors without crashing the program
C. To enforce strict type annotations
D. To ensure functions always return None

Answer: B

NEW QUESTION # 131
What is the purpose of using the groupby() function in a Pandas DataFrame when analyzing a dataset with multiple categories and numerical values?

A. To split the data into subgroups for aggregation
B. To sort the DataFrame by a specific column
C. To filter rows based on index values
D. To append new rows to the DataFrame

Answer: A

NEW QUESTION # 132
What distinguishes structured data from unstructured data in the context of data modeling and storage?

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

Answer: C

NEW QUESTION # 133
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