Old tests asked: Which is a valid lambda?
New tests ask: Given a complex lambda with variable capture and exception handling, does it compile?
This is the heart of the specific Java 8 upgrade test. You must know this inside and out. ikm java 8 test updated
Let’s break down the most heavily tested—and most frequently failed—topics in the ikm java 8 test updated version. Old tests asked: Which is a valid lambda
Question 63:
Supplier<LocalDate> s1 = LocalDate::now;
Supplier<LocalDate> s2 = () -> LocalDate.now();
Are they equivalent? No—method reference captures the class, lambda captures the instance? Wait, LocalDate::now is a static method reference. Both produce the same result. But the test asked about serializability. Are they equivalent
A lambda that captures no variables is serializable. A method reference to a static method is serializable. But a method reference to an instance method of a particular object is not. The question gave five variations. One was subtly non-serializable.
Arjun realized: IKM doesn’t test knowledge. It tests the absence of ignorance.