I think you should learn
these
classes/interfaces java.io.Console, java.util.NavigableSet, java.util.NavigableMap
then you should go for SCJP 6.0
It can take one week to learn these new concepts(depends on you)
However i said you before, passing mark is not same it has increased to 47
true answers...
these new classes and interfaces aren't hard to learn, the rest of the questions is same on the exam.
I think it is clear for now ?