Here is my list of some practical tips for any Oracle Java certification aspirants. These tips are based on my own experience and what I have heard from many readers on my blog and all over internet
Write Code Daily
One of the best way to prepare for Java certification is to write code daily. Try to code the questions and examples given in the book and see if answer matches with the output of the program. This will not only develop software personality But also improving your code reading ability which is very important to solve Java Puzzles from actual exams.
You can also experiment with your code to see how one small change can totally change the output of the program. If you just do exercise without coding, you That will not learn much. That's like students mug concepts in schools. Don't do that, it may not result in the desired outcome if there is even the slightest change in the actual exam.
Solve Practice questions from Book
You should first try to solve the practice questions, quizzes, fill in the blanks and other exercises given in your book and always solve them honestly ie know everything about them. For example, once you are done with one question, you should know what is Expected, why the correct answer is right and why all other answers are incorrect. If you solve questions like this in your learning phase, you will learn a lot more concepts by just solving a single question. This is IMHO, the right way to use The exercise and practice questions.
Participate in CodeRanch Forum
You need an environment to boost your preparation and there is no better place to get that environment than http://coderanch.com/. It was earlier known as Javaranch forum and it is certainly the best place to hang out if you are preparing for Java certifications.
The CodeRanch form has got the biggest and most active community of Java developers preparing for various Java certifications like OCAJP, OCPJP, Java Web Developer Exam, Java Web Service exam, and even Java Architect level exam. Even several famous book authors like Kathy Sierra and Mala Gupta hangs around there.
By participating on this forum, you will not only be up-to-date with any Change happening on the syllabus but also other news about the exam. They even have dedicated forum for different Oracle Java certification eg separate forum for OCAJP and OCPJP exams are the best place if you are preparing for them.
You can not only use this forum to get help but also help others revise your knowledge, this will also help you to clear out any misconception you might have. By hanging out, you will also learn about several free mock exam and other Java certification Resources by various participants.
Do Mock Exams
Java Certification preparing is virtually incomplete without taking a couple of mock exams. They are the most important part of your preparation because by giving mock exam in the actual exam like environments you gauge your speed, accuracy, and endurance. You also get familiar with the actual pattern and how to deal with both touch and easy questions.
I also suggest to only use quality mock exams from Whizlabs or Java8Certification and spend a lot of time on analyzing each question, even wrong choices to figure out why they are wrong. You can use them as your final learning tool.
Btw, Don't rush through all exams in quick time. Given one of them, record your score to gauge speed and accuracy and go through all the questions again, particularly the ones which you did wrong. Don't give next exam, unless you are comfortable with the topics you haven't done well on the first try. If you are doing it right then you will gradually see your speed and accuracy increasing.
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