Are really all insert() methods of the StringBuffer class needed in the exam ? im not quite sure what the parameter int offset in the Official Java API means
I don't have idea about latest exam objectives and syllabus.
But all of these are of similar in nature/syntax and there is no harm in learning all of them.
SCJP SCWCD AIX SOA AWS GA
The significant problems we face cannot be solved by the same level of thinking that created them -- Albert Einstein