Java SE 8 Programmer I (OCAJP 8)

Core Java SE 8 syntax and semantics at code-reading level: data types and casting, operators and decision constructs, arrays, loop constructs, methods and encapsulation, inheritance and polymorphism, exception handling, and selected API classes such as String, StringBuilder, ArrayList, and java.time. There is no IDE, no compiling, and no project work during the exam.

Experienced developers often find the material familiar but the questions unforgiving. Most misses come from subtle rules rather than big concepts: integer promotion in expressions, char arithmetic, static context restrictions, overload resolution with var-args, finally-block behavior, and whether a line is a compile error versus a runtime exception. Practicing on paper is essential.

We could not confirm these details: the official Oracle University page for 1Z0-808 was unavailable when this page was written. Question count, duration, passing score, fee, delivery options, and retake rules must be checked on Oracle's certification site or with your local Oracle University representative before you schedule.

Retake policy is not verified here because the official exam page could not be retrieved. Oracle's certification terms historically include a waiting period between attempts and a full or partial fee for each retake, but confirm the current rule and price with Oracle directly rather than relying on older accounts.

Start with declarations, primitive types, casting, and operators, because every later question depends on them. Then do decision constructs and loops, then arrays, then methods, overloading, and encapsulation. Inheritance and polymorphism come next, exceptions after that, and the API classes last, since String, StringBuilder, and ArrayList questions usually combine earlier rules.

Guessing output without checking whether the code compiles; forgetting that a switch on String needs matching case constants; assuming finally is skipped by a return; missing that an overridden method cannot widen access or throw broader checked exceptions; and confusing array length with String length(). Another frequent error is misreading static methods that reference instance fields.

Only the basics that appear in code snippets: LocalDate, LocalDateTime, and Period creation, plus the immutability rule that methods such as plusDays return a new object rather than modifying the original. Know that date-time objects are immutable and that chained calls without reassignment change nothing. Deep API memorization is not required.

It signals verified Java fundamentals to employers screening junior developers, and it is a reasonable confidence check before interviews. Its value is lower for senior roles, where project evidence matters more. Check Oracle's current certification catalogue first, since Oracle periodically retires or replaces exam versions.