Oracle认证考试1Z0-853单项选择题每日一练(2019.01.12)

单项选择题
Given： 11. String test = "This is a test"； 12. String[] tokens = test.split（"\s"）； 13. System.out.println（tokens.length）； What is the result？（）
A. An exception is thrown at runtime.
B. 1
C. 4
D. Compilation fails.
E. 0
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：What is the result？（）
A. An exception is thrown at runtime.
B. int Long
C. Compilation fails.
D. Short Long
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
Click the Exhibit button. Given this code from Class B： 25. A a1 = new A（）； 26. A a2 = new A（）； 27. A a3 = new A（）； 28. System.out.println（A.getInstanceCount（））； What is the result？（）
A. Compilation of class A fails.
B. Line 28 prints the value 3 to System.out.
C. Line 28 prints the value 1 to System.out.
D. Compilation fails because of an error on line 28.
E. A runtime error occurs when line 25 executes.