多項(xiàng)選擇題

Which statements about Java code security are true？（）

A. The bytecode verifier loads all classes needed for the execution of a program.
B. Executing code is performed by the runtime interpreter.
C. At runtime the bytecodes are loaded， checked and run in an interpreter.
D. The class loader adds security by separating the namespaces for the classes of the local file system from those imported from network sources.

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單項(xiàng)選擇題

Given the following code fragment：
1） String str = null；
2） if （（str != null） && （str.length（） > 10）） {
3） System.out.println（"more than 10"）；
4） }
5） else if （（str != null） & （str.length（） < 5）） {
6） System.out.println（"less than 5"）；
7） }
8） else { System.out.println（"end"）； }
Which line will cause error？（）

A. line 1
B. line 2
C. line 5
D. line 8

單項(xiàng)選擇題

A class design requires that a member variable cannot be accessible directly outside the class. Which modifier should be used to obtain the access control？（）

A. public
B. no modifier
C. protected
D. private

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Which statements about Java code security are true？（）

你可能感興趣的試題

A class design requires that a member variable cannot be accessible directly outside the class. Which modifier should be used to obtain the access control？（）

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A class design requires that a member variable cannot be accessible directly outside the class. Which modifier should be used to obtain the access control？（）