Question 155 of 1,840
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350-401 Practice Question: Which three statements about Python functions and…
Which three statements about Python functions and modules for network automation are true? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using functions helps avoid code duplication and improves script maintainability.
Correct answers: A, C, and E. A is correct because functions promote code reuse and readability by encapsulating logic. C is correct because the json module is essential for parsing JSON responses from REST APIs. E is correct because the re module allows pattern matching in device outputs, such as parsing 'show' command results. B is incorrect because the os module is for operating system interactions, not for parsing JSON. D is incorrect because the csv module is for reading/writing CSV files, not for parsing JSON.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Using functions helps avoid code duplication and improves script maintainability.
Why this is correct
Correct because functions encapsulate reusable logic, reducing duplication and making scripts easier to maintain.
- ✗
The os module is used to parse JSON data from network device responses.
Why it's wrong here
Incorrect because the os module provides operating system interfaces (e.g., file paths, environment variables); JSON parsing is done with the json module.
- ✓
The json module is used to convert JSON strings to Python dictionaries.
Why this is correct
Correct because json.loads() converts a JSON string into a Python dictionary, which is common when working with REST API responses.
- ✗
The csv module is used to parse JSON data from network devices.
Why it's wrong here
Incorrect because the csv module handles comma-separated values, not JSON; JSON parsing requires the json module.
- ✓
The re module is useful for extracting specific patterns from device show command output.
Why this is correct
Correct because the re module provides regular expression support, which is commonly used to parse and extract data from CLI outputs.
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Last reviewed: Jun 18, 2026
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