6.1 Interpret Basic Python Components and Scripts 350-401 Practice Questions (Page 1)

Questions 1–5

1. 1expert · medium

   A Python script that uses netmiko to back up device configurations runs successfully for most devices but fails with a 'TimeoutError' on one device after 30 seconds. The script currently has no exception handling and stops. The engineer needs to make the script resilient and log the failure without stopping the entire backup process. Which modification best achieves this?

   • AUse a global try-except around the entire for loop to catch TimeoutError.
   • BAdd a retry loop that attempts the connection three times before giving up.
   • CIncrease the netmiko timeout parameter to 60 seconds for all devices.
   • DWrap the netmiko connection call in a try-except block that catches TimeoutError, logs the device IP, and continues to the next device.
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2. 2foundation · easy

   What is the purpose of the 'finally' block in a try-except statement?

   • AIt executes only if no exception occurs.
   • BIt stops the program if an exception occurs.
   • CIt executes only if an exception occurs.
   • DIt always executes, regardless of whether an exception occurred.
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4. 3foundation · easy

   Which Python data structure is best suited for storing a collection of key-value pairs?

   • ASet
   • BList
   • CDictionary
   • DTuple
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5. 4application · medium

   A Python script that automates device configuration fails with a 'NameError: name 'device_list' is not defined' when run from the command line. The variable is defined in another script that is imported at the top. Which debugging step is most likely to reveal the cause?

   • ACheck the Python version installed on the system.
   • BRun the script with python -v to see verbose import messages.
   • CAdd a print statement inside the imported module to confirm it executes.
   • DCheck whether the import statement uses 'from module import device_list' or 'import module' and whether the variable is referenced as module.device_list.
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6. 5foundation · easy

   Which of the following is a common debugging technique in Python?

   • AUsing print() statements to display variable values
   • BUsing the 'fix' function
   • CUsing the 'trace' command
   • DUsing the 'debug' keyword
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