Java 11 Interview Questions and Answers
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Java 11 is the second release of the long-term support (LTS) after Java 8. Since Java 11, Oracle JDK is no longer free for commercial use. You can use it in the development stages, but you need to buy a license to use it commercially. After Java 11, Oracle will not provide free long-term (LTS) support for any single Java version.
To check the detail difference, please check here: OracleJDK vs OpenJDK 💯💯
One of the Oracle JDK commercial features that have been open-sourced is Java Flight Recorder. In addition to Java Flight Recorder, Java Mission Control has also been open sourced.
Java Flight Recorder is an always-on, low-overhead, data collection framework that you can use to get metrics on your JVMs. It's implemented as a bounded circular buffer, which buffers internal JVM metrics for a configurable amount of minutes. The great thing about this feature is that you can leave it enabled on your prediction systems because it's so low overhead.
Java Mission Control is an application that can analyze the dumps that come from Java Flight Recorder, and give you a graphical overview of what's happening inside of a JVM.
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