title: What does 'synchronized' mean?
body: <p>I have some questions regarding the usage and significance of the <code>synchronized</code> keyword. </p>
  
  <ul>
  <li>What is the significance of the <code>synchronized</code> keyword?</li>
  <li>When should methods be <code>synchronized</code>?</li>
  <li>What does it mean programmatically and logically?</li>
  </ul>