Update NodeJS.md

RUJodan · RUJodan · commit 6e15218c64f7 · 2016-03-10T11:41:04.000-05:00
diff --git a/NodeJS.md b/NodeJS.md
@@ -3,3 +3,11 @@
     require('http').createServer( (req, res) => {
         // make me serve different files on /foo vs /bar
     });
+
+What is "callback hell" and describe a solution methodology.
+
+How do you handle an unhandled exception in NodeJS? Use the process object to create an exception handler for these.
+
+    process.on('uncaughtException', function(err) {
+        console.log('Caught exception: ' + err);
+    });
