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Sun certified programmer developer for java 2 study guide phần 6

nếu lớp Beagle mở rộng Dog, và lớp Beagle có chỉ có một nhà xây dựng, mà sau đây có thể là các nhà xây dựng pháp luật cho Beagle lớp? | Self Test 53 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. public void ThreeConst int x System.out.print x 2 public void ThreeConst long x System.out.print x public void ThreeConst System.out.print no-arg what is the result A. no-arg B. 8 4 no-arg C. no-arg 8 4 D. Compilation fails. E. No output is produced. F. An exception is thrown at runtime. 15. Given the following 1. class Dog 2. Dog String name 3. if class Beagle extends Dog and class Beagle has only one constructor which of the following could be the legal constructor for class Beagle A. Beagle B. Beagle super C. Beagle super fido D. No constructor allow the default constructor 16. Which two of these statements are true about constructors Choose two. A. Constructors must not have arguments if the superclass constructor does not have arguments. B. Constructors are not inherited. C. Constructors cannot be overloaded. D. The first statement of every constructor is a legal call to the super or this method. 54 Chapter 5 Object Orientation Overloading and Overriding Constructors and Return Types Return Types Sun Objective 1.4 17. Given the following 13. int x 14. x n.test 18. int test 19. 20. return y 21. which line of code inserted at line 19 will not compile A. short y 7 B. int y int 7.2d C. Byte y 7 D. char y s E. int y 0xface 18. Given the following 14. long test int x float y 15. 16. which two of the following lines inserted independently at line 15 would not compile Choose two. A. return x B. return long x y C. return long y D. return int 3.14d E. return y x F. return x 7 19. Given the following 1. import java.util. 2. class Ro 3. 4. 5. 6. public static void main String args Ro r new Ro Object o r.test Self Test 55 7. 8. 9. 10. 11. 12. Object test which two of the following code fragments inserted at lines 9 10 will not compile Choose two. A. return null B. Object t new Object return t C. int a new int 2 return a D. char c new char 2 2 return c 0 1 E. char c new char 2 2 return c 1 F. return 7 20. Given the .