title: Scala dependency on Spark installation
body: <p>I am just getting started with Spark, so downloaded the <code>for Hadoop 1 (HDP1, CDH3)</code> binaries from <a href="https://spark.incubator.apache.org/downloads" rel="noreferrer">here</a> and extracted it on a Ubuntu VM. Without installing Scala, I was able to execute the examples in the <a href="http://spark.incubator.apache.org/docs/latest/quick-start.html" rel="noreferrer">Quick Start</a> guide from the Spark interactive shell.</p>
  
  <ol>
  <li>Does Spark come included with Scala? If yes, where are the libraries/binaries?</li>
  <li>For running Spark in other modes (distributed), do I need to install Scala on all the nodes?</li>
  </ol>
  
  <p>As a side note, I observed that Spark has one of the best documentation around open source projects.</p>