单项选择题
A.Jar A
B.Jar B
C.Jar C
D.Jar D
E.Jar E
单项选择题 Given: When line 15 is reached, how many objects are eligible for the garbage collector?（）
单项选择题 Given a class Repetition: Which code should be inserted at line 1 of Demo.java to compile and run Demo to print "pizzapizza"?（）
单项选择题 Given: Which code fragment, inserted at line 23, allows the code to compile?（）
