单项选择题

Given： String[] elements = { for ， tea ， too }； String ……

Given：
String[] elements = { "for"， "tea"， "too" }；
String first = （elements.length > 0）？ elements[0] ： null；
What is the result？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.The variable first is set to null.
D.The variable first is set to elements[0].

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单项选择题Given two files， GrizzlyBear.java and Salmon.java： If both classes are in the correct directories for their packages，and the Mammal class correctly defines thefindSalmon（） method， which change allows this code to compile？（）

A.add import animals.mammals.*； at line 2 in Salmon.java
B.add import animals.fish.*； at line 2 in GrizzlyBear.java
C.add import animals.fish.Salmon.*； at line 2 in GrizzlyBear.java
D.add import animals.mammals.GrizzlyBear.*； at line 2 in Salmon.java B

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A.0
B.1
C.2
D.3
E.4

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A.Compilation fails.
B.An exception is thrown at runtime.
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C.No output is produced.1 2 3 4
D.An exception is thrown at runtime.1 2 3

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