Practice Quiz: Processing Log Files » Week 4 » Using Python To Interact With The Operating System

Q: You have created a Python script to read a log of users running CRON jobs. The script needs to accept a command line argument for the path to the log file. Which line of code accomplishes this?

Right on! This will assign the script's first command line argument to the variable "syslog".

Q: Which of the following is a data structure that can be used to count how many times a specific error appears in a log?

Great work! A dictionary is useful to count appearances of strings.

Q: Which keyword will return control back to the top of a loop when iterating through logs?

Excellent! The continue statement is used to return control back to the top of a loop.

Q: When searching log files using regex, which regex statement will search for the alphanumeric word "IP" followed by one or more digits wrapped in parentheses using a capturing group?

Awesome! This expression will search for the word "IP" followed by a space and parentheses. It uses a capture group and \d+ to capture any digit characters found in the parentheses.

Q: Which of the following are true about parsing log files? (Select all that apply.)

Well done! Since log files can get pretty large, it's a good idea to parse them one line at a time instead of loading the entire file into memory at once.