Can you assign an int value to a variable of type Integer? = Can you assign an array of int to an array of Integer? What’s the default visibility of methods and fields in a Java class? public, protected, private Can an enum implement an interface? Can you mark an interface method as abstract? True or false? From a constructor, it is not possible to invoke instance methods on the object being constructed. True or false? A static nested class has access to all members of the enclosing class, even if they are declared private. True or false? Comparator is an example for the Strategy pattern. True or false? One cannot define a finally block without a preceding catch block. True or false? The code within a finally block will be executed, only if an exception occurs within the try block. True or false? JDBC has been deprecated, to be replaced by JPA. True or false? When leaving a 'synchronized' block, one has to make sure the lock is released by always using a 'try + finally' construct. True or false? In Spring, all beans are singletons. True or false? The use of Spring has the downside that classes used as Spring beans cannot be unit tested using plain Java, one needs to use a special SpringRunner/Extension.