Identify classes that correctly implement an interface where that interface is either java.lang.Runnable or a fully specified interface in the question.
State the effect of using a variable or array element of any kind when no explicit assignment has been made to it.
Read Sections 2.3 “Variable Declarations” and 2.4 “Initial Values for Variables.” For interface implementation, see Section 6.4 “Interfaces.” For implementation of java.lang.Runnable, see Section 9.3 “Thread Creation.”
Interfaces can be defined within several contexts, and the contexts influence the meaning of the declaration and the modifiers applicable. The modifiers used also influence the restrictions that apply for ...