Question-26: What is the format Blueprint is created?

Answer: You can export the Blueprint, which is a JSON file and later on re-use the same. Administrator should keep it somewhere so in future if required can be easily accessible.

Question-27: Once I have setup the HDP cluster, is it possible that I can change the JDK?

Answer: Yes, you can do that using the Ambari. As HDP does not already include the JDK library. You need to separately install first.

Question-28: What are the known specifics about Oracle JDK 11?

Answer: As a Hadoop administrator you must be aware about the JDK stuff. Oracle had released its Oracle JDK11 in September 2018 and require support subscriptions. And also, regarding Java SE 8 Oracle will not post any further updates after Jan 2019. And it would require Oracle Java SE subscriptions.

Question-29: What is JCE?

Answer: JCE is a java Cryptography extension, if you are using Kerberos with the encryption enabled then you must have JCE installed which is compatible with your JDK. (To understand more check what all trainings are available on http://hadoopexam.com If both JCE and JDK are not compatible then there would be issues with the starting various services in the cluster.

Question-30:  Once cluster is created, can I rename that cluster?

Answer: Yes, you can rename the cluster. Once it is created.