单项选择题
What is the result？（）
A. The code compiles and “s=” is printed.
B. The code compiles and “s=null” is printed.
C. The code does not compile because Strings is not initialized.
D. The code does not compile because because Strings cannot be referneed.
E. The code comiles.butt a NullPointerException is thrown when toString is called.
相关考题
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多项选择题
Whichtwoarevaliddeclarationsofchar？（）
A. Char ch = “a”；
B. char ch = “”；
C. char ch = “café”；
D. char ch = “ucafe”；
E. char ch = “ucafe’；
F. char ch = “u10100’；
G. char ch = （char） true； -
多项选择题
Which three logical expressions evaluate to true？（）
A. （a = = c）
B. （d = = c）
C. （b = = d）
D. （a = = b）
E. （b = = c）
F. （d == 10.0） -
单项选择题
What is the result？ （）
A. The program prints “lava”.
B. The program prints “java”.
C. An error at line 7 causes compilation to fail.
D. Complication succeeds but the program throws an exception.
