hadoop concept question

[#1]

What is correct about Oozie(Select one)

What is correct about oozie? (Select one)
A. Oozie server runs in namenode.
B. Oozie server must run as a process in the hadoop cluster.
C. Oozie server runs as a separate hadoop client process outside the hadoop cluster.
D. Oozie server can run in all the Datanodes but not in namenode as hadoop process.

[#2 · Accepted solution]

Answer is C. 

[#3]

Answer is C