Can you make a CAPTCHA to tell coders from non-coders?

What about a buzzword-filled multiple-choice question such as:

  Which of the following sentences does not make sense?
  a) I love to use Visual Studio to write hyperthreaded Linux apps.
  b) reasonable sentence
  c) reasonable sentence

or even a simple technical question to weed out dummies such as

  Which of the following is not a browser?
  a) Google
  b) Internet Explorer
  c) Firefox

x=(true)?5:9

What is x?