Which two valid alternatives to line 3 would decouple this application from a specific implementation of customerDAO?
When applying composition to these two classes, what functionality should you extract into a new class?
Which three must be used when using the Java.util.concurrent package to execute a task that returns a result without blocking?
Which statement creates a low-overhead, low contention random number generator that is isolated to a thread to generate a random number between 1 and 100?