单项选择题
A. If a is true and b is true then the output is “A&&B”.
B. If a is true and b is false then the output is “notB”.
C. If a is false and b is true then the output is “ELSE”.
D. If a is false and b is false then the output is “ELSE”.
单项选择题 public class Foo { public void main（ String[] args ） { System.out.println（ “Hello” + args[0] ）； } } What is the result if this code is executed with the command line？（）
多项选择题 1. public class OuterClass { 2. private double d1 = 1.0； 3. // insert code here 4. } Which two are valid if inserted at line 3？（）
单项选择题 1. public class ReturnIt { 2. return Type methodA（byte x， double y） { 3. return （long）x / y * 2； 4. } 5. } What is the narrowest valid returnType for methodA in line2？（）