6.1 Interpret Basic Python Components and Scripts 350-401 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A network engineer is writing a Python script to parse a log file. The script uses a variable to store the current line number and increments it in a while loop. The engineer notices that the loop runs indefinitely. Which of the following is the most likely cause?

   • AThe loop condition uses '>' instead of '<'.
   • BThe script uses a 'for' loop instead of a 'while' loop.
   • CThe script uses 'break' instead of 'continue'.
   • DThe variable that controls the loop is not incremented inside the loop.
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2. 17foundation · easy

   What is the purpose of the 'with' statement when working with files in Python?

   • AIt automatically closes the file after the indented block.
   • BIt allows multiple files to be opened at once.
   • CIt makes the file read-only.
   • DIt opens the file in read-only mode.
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4. 18expert · medium

   A Python script defines a function 'connect(device, username, password)' that uses paramiko to establish an SSH connection. The script must call this function for multiple devices, but the password is the same for all devices. The engineer wants to avoid repeating the password in each call. Which approach is most Pythonic?

   • ACreate a dictionary of device parameters and use **kwargs to unpack it.
   • BDefine a wrapper function that has a default password parameter and calls connect with it.
   • CSet a global variable for the password and reference it inside the connect function.
   • DPass the password as a keyword argument in every call.
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5. 19foundation · easy

   Which of the following is a valid Python data type?

   • Acharacter
   • Binteger
   • Cdecimal
   • Dreal
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6. 20application · medium

   A Python script contains a function that parses a list of show command outputs and extracts interface names. The engineer wants to reuse this function in another script without copying the code. Which approach is the most maintainable?

   • ARewrite the function from scratch in the new script with slightly different variable names.
   • BCopy the function definition into the new script and rename it to avoid conflicts.
   • CSave the function in a separate .py file and use 'from module import function' in the new script.
   • DUse exec() to read the original script and execute the function definition in the new script.
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