Hi deepa, Yes beginners can complete certification (SCJP) by self study. And the time required depends on how quick you get the concept, programming practice and of course your enthusiasm Anyways to begin with, decide upon the certification you wish to take SCJP1.4/5.0/6.0 and then start with the resources (this site itself being one of the best ). I recommend to start with Head First Java by Kathy Sierra and Bert Bates again best for beginners. And you will find everything you need right here.
Hi Deepa, As I've said, that depends on your current exposure to the language and technology, but for a rough estimate, let us say a daily two hours study & practice for two months should suffice. But if you are entirely new to OOP concepts and programming, add another 20-25 days. But again that's flexible, if you give some effort and enthusiasm, you can cut it down to just 20-25 days. And which exam to opt for depends on your choice.The SCJP 6.0 is the latest version available but you can think of 5.0 or even 1.4 if need be.
The 1.5 and 1.6 are almost identical, and the 1.4 is very old. At this point, I'd say that most people should focus on the 1.6 - you get the benefit of having the "latest and greatest" certification with only a tiny bit more effort than the 1.5.
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