5. Explain the Benefits of Organizing Code into Methods / Functions, Classes, and Modules 200-901 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   Two developers are working on the same Python project. One is developing a module that interacts with Cisco DNA Center APIs, and the other is developing a module that parses configuration files. Both modules define a function named 'load'. When the project is assembled, the 'load' function from one module overrides the other. What is the best way to avoid this naming conflict?

   • ARename one of the functions to 'load_config' and update all references.
   • BUse a global variable to store the reference to the correct function before importing the other module.
   • CImport the modules using their full module names and call the functions with the module prefix, e.g., 'dnac.load()' and 'config.load()'.
   • DCombine both modules into a single file to avoid import conflicts.
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2. 2application · medium

   A network automation engineer maintains a Python script that configures VLANs on multiple switches. The script currently repeats the same 20-line configuration block in three different places, each time with a different switch IP. After a firmware update, the configuration command syntax changed, and the engineer must update all three blocks. Which approach best reduces the maintenance burden and risk of missing a spot?

   • AUse a global variable to store the switch IP and update it before each repeated block.
   • BCopy the updated block into a text file and use a script to replace the IP address in each location.
   • CDefine a class with a method for each switch and instantiate an object per switch.
   • DExtract the repeated block into a single function that takes the switch IP as a parameter, then call it three times.
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4. 3expert · hard

   A network automation team is developing a Python application that uses a class to represent a network device. The class has methods like 'connect', 'disconnect', and 'get_config'. The team wants to add logging to every method call to track when devices are accessed. They want to avoid modifying each method individually. Which approach is most maintainable?

   • AUse a decorator that wraps methods to add logging, and apply it to the class methods.
   • BAdd a print statement at the beginning and end of each method.
   • CCreate a subclass that overrides each method and adds logging.
   • DUse a global logging function and call it from within each method.
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5. 4application · medium

   A developer is creating a Python package for network automation. The package will be used by multiple projects, and some projects only need the device configuration functions, while others only need the reporting functions. What is the best way to organize the code to support selective reuse?

   • ADuplicate the functions in each project that needs them.
   • BPut all functions in a single module and let projects import the whole module.
   • CCreate separate modules for configuration and reporting, and allow projects to import only the modules they need.
   • DUse environment variables to enable or disable parts of the module.
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6. 5application · medium

   An organization maintains several Python automation scripts that all need to parse Cisco IOS show commands. Currently, each script contains its own copy of the parsing logic. The team wants to reduce duplication and make updates easier. What is the most effective approach?

   • AStore the parsing logic in a configuration file that scripts read at runtime.
   • BUse environment variables to share the parsing logic across scripts.
   • CCopy the parsing code into a common text file and instruct developers to paste it into their scripts.
   • DCreate a shared Python module with parsing functions and import it in each script.
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