What kind of ports do Oracle Web Cache and Oracle Http Server come pre-configured with ？ （）

A. adding hardware may exacerbate inefficiency， which can lead to over provisioning and lower utilization
B. performance may degrade due to bottlenecks such as database connections that won’t scale in lock step with other dimensions such as computing capacity or memory
C. both A and B are valid
D. neither A nor B are valid

A. ConcurrentMap
B. Java.Util.AbstractMap
C. ObservableMap
D. InvocableMap

A. same version 
B. different versions
C. same patch set
D. most recent patch set