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Pass Guaranteed Quiz Professional PCAD-31-02 - Valid Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Exam Cram

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Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Sample Questions (Q92-Q97):

NEW QUESTION # 92
Which operation would most efficiently apply element-wise multiplication to two NumPy arrays of equal size?

A. array1.dot(array2)
B. numpy.outer()
C. numpy.matrix()
D. array1 * array2

Answer: D

NEW QUESTION # 93
Why is it important to define and apply validation rules consistently across all stages of a data pipeline?

A. It reduces processing time by skipping null checks
B. It guarantees compatibility with visualization tools
C. It prevents the propagation of corrupted or invalid data
D. It automatically optimizes SQL queries

Answer: B

NEW QUESTION # 94
What is the best approach when comparing SQL NULL values with Python data during conditional checks?

A. Use Python's None and SQL's IS NULL clause
B. Convert all NULL to string before comparison
C. Replace NULL with zero before importing
D. Use == None directly in SQL queries

Answer: A

NEW QUESTION # 95
Which of the following correctly demonstrates the use of parameterized queries using Python's sqlite3 module?

A. cursor.execute("SELECT * FROM users WHERE id = " + user_id)
B. cursor.execute("SELECT * FROM users WHERE id = ?", (user_id,))
C. cursor.execute("SELECT * FROM users WHERE id = ?", user_id)
D. cursor.execute("SELECT * FROM users WHERE id = ':id'", {'id': user_id})

Answer: B

NEW QUESTION # 96
What is the benefit of using the __name__ == "__main__" construct in Python scripts?

A. It prevents modules from being imported
B. It defines the main function in Python
C. It allows selective execution of code when run as a script
D. It allows access to all global variables

Answer: C

NEW QUESTION # 97
......

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