5. Explain the Benefits of Organizing Code into Methods / Functions, Classes, and Modules 200-901 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   How does organizing code into small functions and classes primarily improve the testing process?

   • AIt automatically generates test reports.
   • BIt allows each unit to be tested in isolation.
   • CIt eliminates the need for test cases.
   • DIt guarantees that all tests will pass.
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2. 17application · medium

   A junior developer wrote a Python script that configures interfaces on a router. The script has a 50-line block that validates an IP address and subnet mask, and this block appears in three different functions. A senior engineer asks the developer to refactor the code. What is the primary benefit of extracting this repeated block into a single function?

   • AIt reduces the chance of inconsistent validation logic and makes future changes easier.
   • BIt automatically generates documentation for the validation logic.
   • CIt allows the script to be imported as a module without executing the main logic.
   • DIt makes the script run faster because there is less code to execute.
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4. 18expert · hard

   A network automation team is refactoring a monolithic Python script into a modular structure. The script currently has a function that both parses device data and writes the parsed data to a database. The team wants to improve testability and allow the parsing logic to be reused in a different context. What is the best refactoring strategy?

   • AKeep the function as is but add a parameter to skip database writing when testing.
   • BMove the database writing code to a separate module but keep parsing in the original function.
   • CSplit the function into two functions: one for parsing and one for database writing, and place them in separate modules.
   • DUse a global variable to indicate whether to write to the database.
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5. 19application · medium

   A network automation engineer writes a Python script that configures VLANs on multiple switches. The same block of code that builds the VLAN configuration payload appears in three different parts of the script. After a firmware upgrade, the payload format changes, and the engineer must update all three copies. Which code organization change would most directly reduce the maintenance burden?

   • AAdd comments above each copy of the payload-building code explaining the format.
   • BSplit the script into two separate files, one for VLAN configuration and one for the main logic.
   • CDefine the payload as a global variable at the top of the script.
   • DMove the payload-building code into a single function and call it from each location.
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6. 20application · medium

   A network automation team is writing unit tests for a Python script that processes device inventory data. The script currently has all logic in a single main() function that reads a file, parses data, and writes output. The team wants to test the parsing logic independently without running the entire script. Which refactoring step is most effective?

   • AAdd print statements inside main() to debug the parsing logic.
   • BExtract the parsing logic into a separate function that takes input data and returns parsed data.
   • CMove the parsing logic into a separate module but keep it inside main() as a nested function.
   • DUse a global variable to store the parsed data and access it from the test.
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