Chapter Assessment: Modern Java for Spring

This review covers the Java background the rest of the course relies on: lambdas and functional interfaces, streams, Optional, records and enums, annotations read through reflection, and the Maven and Gradle builds. The bank holds 20 questions, and each attempt draws ten. Most questions show a short piece of booking service code or a build step and ask what happens when it runs, compiles, or is packaged. A few ask you to count seats checked by a lazy stream, fallbacks built by orElse, or jars in the packaged application. Have four things ready: when a lambda body runs, when orElse evaluates its argument, how a compact constructor rejects bad input, and which scope reaches which classpath. When an answer is wrong, treat it as a sign of which lesson to reread, and read the explanation on every option.