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[General] Important Features of Pass4SureQuiz Python Institute PCAD-31-02 Exam Questions

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【General】 Important Features of Pass4SureQuiz Python Institute PCAD-31-02 Exam Questions

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Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Sample Questions (Q15-Q20):NEW QUESTION # 15
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 .isin() to compare the foreign key column against the parent key column
  • B. Use df.dropna() on the foreign key column
  • C. Use df.merge() with how='outer'
  • D. Use df.sort_values() to sort both columns before merging
Answer: A

NEW QUESTION # 16
What is one potential risk of dynamically constructing SQL queries using string concatenation in Python scripts?
  • A. Slower database performance
  • B. Missing foreign key constraints
  • C. Increased memory usage
  • D. Exposure to SQL injection attacks
Answer: D

NEW QUESTION # 17
What is the primary reason for using parameterized queries instead of directly formatting SQL strings in Python?
  • A. To allow dynamic table creation
  • B. To simplify data encryption
  • C. To reduce the number of SQL statements
  • D. To prevent SQL injection vulnerabilities
Answer: D

NEW QUESTION # 18
Which statements correctly describe differences between linear and logistic regression?
(Choose two)
  • A. Linear regression requires target variables to be binary
  • B. Logistic regression uses the logit function to model relationships
  • C. Linear regression applies only to classification tasks
  • D. Logistic regression outputs probabilities, while linear regression predicts continuous values
Answer: B,D

NEW QUESTION # 19
Which two benefits are most closely associated with using object-oriented programming (OOP) in data analysis pipelines?
(Choose two)
  • A. Encourages code reuse through inheritance and modularity
  • B. Supports clearer abstraction by modeling real-world entities
  • C. Enables procedural programming only through decorators
  • D. Allows the use of lambda for procedural logic
Answer: A,B

NEW QUESTION # 20
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