Question #196

Author: admin
tags: Node.js  
Node JS is running on Linux:
process.env.BLAH = 'hello';
// Spawn subprocess:
exec('echo $BLAH', (err, stdout) => {
  console.log(stdout); // ?
});
What will be printed?
'hello'
'' (empty string)
'echo $BLAH'
'$BLAH'
Modifying the process.env object affects env variables of spawned subprocesses.
Rate the difficulty of the question:
easyhard