Should I register for SCJD 1.4 or wait for SCJD 5?
There will be no versioning information specified for SCJD. Thus, you can use any JDK version (required not older than the latest version with 18 months). Some people had already used J2SE Tiger for this assignment. I guess SCJD might be updated, but not due to the version because it is not a concern to SUN as you can always use latest versions for it.