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Python Institute PCAD-31-02 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Data Visualization and Communication | ||
| SQL and Data Management | ||
| Data Acquisition and Pre-Processing | 29.2% | |
| Statistical Methods and Modeling | ||
| Exploratory Data Analysis |
Python Institute Certified Associate Data Analyst with Python (PCAD-31-02) Sample Questions:
Which practices help ensure secure and effective execution of SQL queries in Python scripts?
(Choose all that apply)
- A. Using string concatenation to insert variables into SQL
- B. Wrapping SQL commands in try-except blocks
- C. Using string formatting to build SQL queries dynamically
- D. Employing parameterized statements for user-supplied data
Correct Answer: B,D 🗳️
What is the key difference between the .iloc[] and .loc[] accessors when working with Series or DataFrames?
- A. .iloc[] allows label-based selection
- B. .iloc[] is position-based, while .loc[] is label-based
- C. .loc[] can only be used on Series
- D. .loc[] does not allow slicing
Correct Answer: B 🗳️
Which of the following are key differences between Pandas and NumPy arrays?
(Choose two)
- A. Pandas handles labeled data; NumPy does not
- B. NumPy supports string indexing; Pandas does not
- C. Pandas Series are more memory efficient than NumPy arrays
- D. Pandas integrates better with tabular data and missing values
Correct Answer: A,D 🗳️
What is the main reason for using try-except blocks in a data analysis script that reads multiple files?
- A. To enforce strict type annotations
- B. To automatically restart the script after execution
- C. To gracefully handle runtime errors without crashing the program
- D. To ensure functions always return None
Correct Answer: C 🗳️
What is the primary reason for converting all categorical labels to lowercase during the data cleaning process?
- A. To improve data visualization aesthetics
- B. To make string comparison operations slower
- C. To reduce memory usage in the dataset
- D. To avoid treating the same category as different due to case differences
Correct Answer: D 🗳️
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