Oracle认证考试1Z0-853单项选择题每日一练(2019.01.14)

单项选择题
Given：Which statement is true？（）
A. The cardID and limit variables break polymorphism.
B. The code demonstrates polymorphism.
C. The ownerName variable breaks encapsulation.
D. The setCardInformation method breaks encapsulation.
E. The class is fully encapsulated.
单项选择题
Given：What is the result？（）
A.A
B.B
C.C
D.D
E.E
单项选择题
Click the Exhibit button. Given： ClassA a = new ClassA（）； a.methodA（）； What is the result？（）
A. The code runs with no output.
B. Compilation fails.
C. An exception is thrown at runtime.
D. ClassC is displayed.
单项选择题
Given： 11. static class A { 12. void process（） throws Exception { throw new Exception（）； } 13. } 14. static class B extends A { 15. void process（） { System.out.println（"B "）； } 16. } 17. public static void main（String[] args） { 18. A a = new B（）； 19. a.process（）； 20. } What is the result？（）
A. Compilation fails because of an error in line 19.
B. An exception is thrown at runtime.
C. B
D. Compilation fails because of an error in line 18.
E. Compilation fails because of an error in line 15.
F. The code runs with no output.
单项选择题
Given the command line java Pass2 and：What is the result？（）
A. doStuff x = 6 main x = 6
B. Compilation fails.
C. doStuff x = 6 main x = 7
D. An exception is thrown at runtime.
E. doStuff x = 7 main x = 6
F. doStuff x = 7 main x = 7