多项选择题
Given: Which two methods, inserted individually, correctly complete the Three class?()
A.public void foo() {} B.public int foo() { return 3; } C.public Two foo() { return this; } D.public One foo() { return this; } E.public Object foo() { return this; }
单项选择题 Given: What is the result?()
单项选择题 Given: 10.interface Data { public void load(); } 11.abstract class Info { public abstract void load(); } Which class correctly uses the Data interface and Info class?()