Explain the validity checks performed on a class file at load time. What is a just-in-time (JIT) compiler? What are its potential advantages over interpretation or conventional compilation? Why might...

Explain the validity checks performed on a class file at load time. What is a just-in-time (JIT) compiler? What are its potential advantages over interpretation or conventional compilation? Why might one prefer bytecode over source code as the input to a JIT compiler? What distinguishes dynamic compilation from just-in-time compilation?