What is the result？（）
A.Compilation fails.
B.pi is bigger than 3.
C.An exception occurs at runtime.
D.pi is bigger than 3. Have a nice day.
E.pi is not bigger than 3. Have a nice day.
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If class Donkey2 is invoked twice， the first time without assertions enabled， and the second time with assertions enabled， what are the results？（）
A.no output
B.no output assert is on
C.assert is on
D.no output ， An Assertion Error is thrown.
E.assert is on ， An AssertionError is thrown.
Under which three circumstances will the code on line 37 be executed？（）
A.The instance gets garbage collected.
B.The code on line 33 throws an exception.
C.The code on line 35 throws an exception.
D.The code on line 31 throws an exception.
E.The code on line 33 executes successfully.
If some sort of exception is thrown at line 34， which output is possible？（）
A.a
B.b
C.c
D.ac
E.abc
What is the result？（）
A.test end
B.Compilation fails.
C.test runtime end
D.test exception end
E.A Throwable is thrown by main at runtime.
What is the result？（）
A.0.0
B.Compilation fails.
C.A ParseException is thrown by the parse method at runtime.
D.A NumberFormatException is thrown by the parse method at runtime.
Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（）
A.Line 16
B.Line 17
C.Line 18
D.Line 19
E.The object is NOT a candidate for garbage collection.
What is the result？（）
A.harrier
B.shepherd
C.retriever
D.Compilation fails
E.retriever harrier
F.An exception is thrown at runtime
When the doSomething method is called， after which line does the Object created in line 5 become available for garbage collection？（）
A.Line 5
B.Line 6
C.Line 7
D.Line 8
E.Line 9
F.Line 10
What is the result？（）
A.null
B.zero
C.some
D.Compilation fails.
E.An exception is thrown at runtime.
Which two statements are true？（）
A.Foo.beta（） is a valid invocation of beta（）.
B.Foo.alpha（） is a valid invocation of alpha（）.
C.Method beta（） can directly call method alpha（）.
D.Method alpha（） can directly call method beta（）.
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Which code， inserted at line 4， guarantees that this program will output [1， 2]？（）
A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）
Which two can be results？（）
Which two of statements are true？（）
A programmer must create a generic class MinMax and the type parameter of MinMax must implement Comparable. Which implementation of MinMax will compile？（）
A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result？（）
What is the appropriate definition of the hashCode method in class Person？（）
Which statement is true？（）
Which statement is true？（）
Which statement is true about the set variable on line 12？（）