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1Z0-819 Oracle Java SE 11 Developer VIP Practice Exam
1Z0-819 — Oracle 1Z0-819 (Java SE 11 Developer) is a single-exam certification issued by Oracle Corporation, consisting of 50 multiple-choice questions in 90 minutes with a 68% passing score, covering Java OOP, streams and lambdas, the Java Platform Module System, concurrency, JDBC, NIO.2 I/O, localization, and annotations.
57
Questions
90m
Time Limit
68.00%
To Pass
Question 1 of 57👑 VIP
A developer writes the following interface: @FunctionalInterface interface Transformer<T> { T transform(T input); default T transformTwice(T input) { return transform(transform(input)); } static <T> Transformer<T> identity() { return t -> t; } } Which statement about this interface is correct?
Questions 2–57 and full explanations are VIP-exclusive.