title: How can an MCU without floating point find sqrt(2)?
body: <p>I got asked this question last interview and expect it again. The interview was for firmware engineer that program embedded systems. The microprocessors and micro controllers available for these applications are not very powerful usually and the simpler ones do not have capability to do floating point calculations (no multiplier or divider present inside).</p>
  
  <p>So what are the possible answers to this question than and what (if anything) does fixed point arithmetic have to do with this?</p>
  
  <p>Is it possible to use the Newton-Raphson method to do this calculation at all? How?</p>