Oracle offers variety of Java Certifications for all Java Editions (Java SE, Java EE and Java ME).  Oracle Certified Associate, Java SE 8 Programmer certification provides basic knowledge required to program Java SE 8 code.

What exam I need to pass to achieve OCA for Java SE 8 Certification?
You need to complete 1Z0-808 – Java SE 8 Programmer I Exam to achieve this certification.

What kind of knowledge I can achieve after completing this certification?
You can gain basic knowledge of Java data types, strings, arrays, loop constructs, methods, encapsulation, inheritance, lambda expressions, date API and exceptions.

Do I need any prior certification to take this exam?
Currently there is no prior requirement from Oracle.

Where do I get complete information about exam objective?
Topic1:  Java Basics
Topic2:  Working With Java Data Types
Topic3:  Using Operators and Decision Constructs
Topic4:  Creating and Using Arrays
Topic5:  Using Loop Constructs
Topic6:  Working with Methods and Encapsulation
Topic7:  Working with Inheritance
Topic8:  Handling Exceptions
Topic9:  Working with Selected classes from the Java API

You can visit Oracle site at http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=5001&get_params=p_exam_id:1Z0-808
or Download EPractize Labs OCAJP 8 Training Lab and click Plan > Objective to know more details about this certification.

How much time I need to prepare for this exam?
You can access our Time Estimator to know your preparation estimation at http://www.epractizelabs.com/certification-advisor/time-estimator.php?s=21

Is there any recommended Training Guide or Book available for this certification?
EPractize Labs offer complete Training Material that includes set of Mock Exams to prepare for this certification.

You can download at http://www.epractizelabs.com/certification/oracle/ocajp-8/mockexam.html

What are the benefits I can achieve after completing this exam?
Clear evidence that you can enter into an application development or a software project career using Java technologies.
The certification empowers in application development using  Java programming language, and general knowledge of Java Platforms and Technologies.
Being a OCAJP 8 certified developer helps you to improve your career potential, gain more respect, and boost up your job security and opportunities.
With OCAJP 8 certified professional, you become more competitive in the job market.

What are the benefits my employer can achieve after completing this exam?
Enables management to distinguish OCAJP 8 certified programmer as Java professionals who can develop Java applications effectively.
Helps in deciding the best design and development APIs or Java Components based on latest Java SE APIs.
More confidence to work on Java Code technical decisions with business partners.
Enables project team to get best practices and guidance from a qualified Java Associate.

Good luck for your preparation!