I shall move you to our OCA forum; please go through that forum and see what people dais they did for revision. Also go through the Certification Results forum. Sorry, I can't seem to find links for those fora just at the moment.
Yes, you can prepare well in 15 days if you spend about 6 hours per day.
First 7 Days Read OCAJP book and Get some working knowledge in each exam objectives. Write programs and run it on your system.
Next 7 Days Practice directly on any exam tools like MyExamCloud. Take OCAJP 8 mock exams and read explanations. After completing all mock exams, start writing programs again. Write program on each concept and try compiling with all possible options. The program directory created in your system must have chapter-wise folders for ease of review. Repeat this till you get good knowledge in exam chapters.
Last Day Review your weak areas and study well. Take final mock exam and try to achieve good score.
The key to achieve good score in real exam is solving as many mock exams as possible. Repeat your practice till you get 100% in all mock exams.
rajeswari kannan wrote:... Write program on each concept and try compiling with all possible options. The program directory created in your system must have chapter-wise folders for ease of review....
1. That seems a perfect use case of a very basic git use.
In that way you would have only one "project directory(aka Working Directory)" into which put your exam's material actual source files, directory hierarchies etc.
As a result at every one moment in time into your working directory you would see only the exact files related in the revision under hand in that moment all other stuff(revisions) are stored safely(that's another pro point in git's favor) under git's DB and are out of your view.
In other words your working directory at any moment in time appears more ordinate and clean than doing otherwise mean through your own manual revisions(as a comparatively messy-insecure-confuse sets of files and directories))
Moreover revision control would be useful to you in your future projects
2. Not consider the last day(s) as full work-study day but as your mind-soul peace day. That very important part of us is usually underestimated. That's a general (empirical) advise for all exams-interviews that can happen in life
[Arguing with an engineer is a lot like wrestling in the mud with a pig. After a few hours, you realize that he likes it] [Learn code first? no we apply to learn programming(or also)first thanks]