Unfortunately I did not clear my Cloudera test.
To prepare for retake. I am not sure if I should study further or investigate what questions I answered incorrect?
Does Cloudera retake result in a different set of questions or will I be presented with same questions I had in my first attempt?
Sure, the exam questions vary all the time. I would study the exam topics, not the questions. http://cloudera.com/content/cloudera/en/training/certification/ccah/prep.html
If you really learn those topics really well, the exam is quite straightforward regardless of the amount of variation.