title: Why overflow didn't happen in here
body: <p>In my past paper answer sheet there is an answer given below:</p>
  
  <pre><code>123 = 01111011
  -65 = 10111111
  sum = 00111010
  Carry occurs, but can be ignored. No overflow, the sum is correct sign.
  </code></pre>
  
  <p>What is the meaning of "<em>the sum is correct sign</em>?" Please explain. </p>