[maherdeeb]

there is also ls -lh -a, ls -l -a -h and so on. I am going to solve this by adding an option in the future to activate the regex if the user doesn't want to memorize a single pattern. Thanks a lot for mentioning it. Regards

[pm7]

Why not do it by default? Why do you believe you can choose one "right" pattern?

Also:

Questions repeated multiple time within single session.

  Question: Write the command that clears the terminal
  command line screen and shows it as new
  Your answer:
  reset
 
  Correct answer:
  clear

"Clear" will not fix terminal in some cases. Maybe do not ask for "and shows it as new" and note you only want to remove current text?

  Question: Write the command that you use
  to move into your home directory '~'
  Your answer:
  cd
  
  Correct answer:
  cd ~