Given a pre-generics implementation of a method： What three changes allow the class to be used with generics and avoid an unchecked warning？（）
A. Remove line 14.
B. Replace line 14 with "int i = iter.next（）；".
C. Replace line 13 with "for （int i ： intList） {".
D. Replace line 13 with "for （Iterator iter ： intList） {".
E. Replace the method declaration with "sum（List
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What is the result？（）
A. Compilation fails.
B. An exception is thrown at runtime.
C. doStuff x=6，main x=6
D. doStuff x=5，main x=5
E. doStuff x=5，main x=6
F. doStuff x=6，main x=5
Given： What is the result？（）
A. Compilation fails due to an error in line 23.
B. Compilation fails due to an error in line 29.
C. A ClassCastException occurs in line 29.
D. A ClassCastException occurs in line 31.
E. The value of all four objects prints in natural order.
What is true regarding a transaction executed in Automatic Undo Management mode？（）
A
B
C
D
Given a class Repetition： Which code should be inserted at line 1 of Demo.java to compile and run Demo to print "pizzapizza"？（）
A. import utils.*；
B. static import utils.*；
C. import utils.Repetition.*；
D. static import utils.Repetition.*；
E. import utils.Repetition.twice（）；
F. import static utils.Repetition.twice；
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