单项选择题 A UNIX user named Bob wants to replace his chess program with a new one， but he is hot sure where the old one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using the command：  java -classpath /test：/home/bob/downloads/* .jar games.Chess  Bobs CLASSPATH is set （at login time） to：  /usr/lib：/home/bob/classes：/opt/java/lib：/opt/java/lib/* .jar  What is a possible location for the Chess.class file？（）

多项选择题 package com.company.application；  public class MainClass {  public static void main（String[] args） { }  }  And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to “.“ （current directory）.  Which two java commands entered at the command line will run MainClass？（）

单项选择题 Given the fully-qualified class names：  com.foo.bar.Dog  com.foo.bar.blatz.Book  com.bar.Car  com.bar.blatz.Sun  Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JYM？（）