（多选题）
What two statements are true about Oracle Enterprise Manager’s Java Diagnostic tool， which makes the tool suitable for production server diagnostics ？（）
A virtually zero overhead for application running in the JVM
B no stalling of running JVM when taking a heap dump for memory analysis
C no need of modification， changes， or instrumentation of the application since is uses Network Protocol Analysis （NPA technology）
D provides Byte Code Instrumentation for Java
正确答案
答案解析
略
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