A.Line 16
B.Line 17
C.Line 18
D.Line 19

A.Exception
B.A NullPointerException is thrown at runtime.
C.Compilation fails because of an error in line 20.
D.Compilation fails because of an error in line 14.

A.null
B.zero
C.some
D.Compilation fails.
E.An exception is thrown at runtime.

A.2
B.24
C.234
D.246
E.2346

A.null
B.finally
C.null finally
D.Compilation fails.
E.finally exception

A.harrier
B.shepherd
C.retriever
D.Compilation fails.
E.retriever harrier

A.1
B.12
C.14
D.123

A.The application will crash.
B.The code on line 29 will be executed.
C.The code on line 5 of class A will execute.
D.The code on line 5 of class B will execute.
E.The exception will be propagated back to line 27.

A.javac Mule.java
B.javac -source 1.3 Mule.java
C.javac -source 1.4 Mule.java
D.javac -source 1.5 Mule.java

A.assert value == null；
B.assert value != null， "value is null"；
C.if （value == null） { throw new AssertionException（"value is null"）； }
D.if （value == null） { throw new IllegalArgumentException（"value is null"）； }

A.An Exception is thrown with no other output
B.B, followed by an Exception.
C.Compilation fails due to an error on line 9.
D.Compilation fails due to an error on line 15.