Given:
10. class One {
11. void foo() { }
12. }
13. class Two extends One {
14. //insert method here
15. }
Which three methods, inserted individually at line 14, will correctly complete class Two?()
A. public void foo() { /* more code here */ }
B. private void foo() { /* more code here */ }
C. protected void foo() { /* more code here */ }
D. int foo() { /* more code here */ }
E. void foo() { /* more code here */ }
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A JavaBeans component has the following field:
11. private boolean enabled;
Which two pairs of method declarations follow the JavaBeans standard for accessing this field?()
A.A
B.B
C.C
D.D
Given:
What is the result? ()
A. A new Item object is created with the preferred value in the id attribute.
B. The attribute id in the Item object is modified to the new value.
C. Compilation fails.
D. An exception is thrown at runtime.
E. The attribute id in the Item object remains unchanged.
Which two code fragments correctly create and initialize a static array of int elements?()
A.A
B.B
C.C
D.D
Given:
What is the result?()
A. An exception is thrown at runtime.
B. int Long
C. Compilation fails.
D. Short Long
Given:
What is the result?()
A.A
B.B
C.C
D.D
E.E
Given:
12. System.out.format("Pi is approximately %d.", Math.PI);
What is the result?()
A. An exception is thrown at runtime.
B. Pi is approximately 3.
C. Pi is approximately 3.141593.
D. Compilation fails.
Given:
Which five methods, inserted independently at line 5, will compile?()
A. protected int blipvert(long x) { return 0; }
B. protected long blipvert(int x) { return 0; }
C. private int blipvert(long x) { return 0; }
D. private int blipvert(int x) { return 0; }
E. public int blipvert(int x) { return 0; }
F. protected long blipvert(long x) { return 0; }
G. protected long blipvert(int x, int y) { return 0; }
Click the Exhibit button.
Given:
Which two statements are true if a NullPointerException is thrown on line 3 of class C?()
A. The application will crash.
B. The code on line 29 will be executed.
C. The code on line 5 of class A will execute.
D. The exception will be propagated back to line 27.
E. The code on line 5 of class B will execute.
Given:
What is the result?()
A. If you define D e = new E(), then e.bMethod() invokes the version of bMethod() defined in Line 5.
B. If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 5.
C. Compilation fails because of an error in line 9.
D. If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 9.
E. Compilation fails because of an error in line 3.
F. Compilation fails because of an error in line 7.
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.
最新试题
Which two code fragments correctly create and initialize a static array of int elements?()
Given:What is the result?()
Given: 11. // insert code here 12. private N min, max; 13. public N getMin() { return min; } 14. public N getMax() { return max; } 15. public void add(N added) { 16. if (min == null added.doubleValue() < min.doubleValue()) 17. min = added; 18. if (max == null added.doubleValue() > max.doubleValue()) 19. max = added; 20. } 21. } Which two, inserted at line 11, will allow the code to compile?()
Given:What is the result?()
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?()
Click the Exhibit button. Given: ClassA a = new ClassA(); a.methodA(); What is the result?()
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? ()
Given:What is the result? ()
Given: Which code, inserted at line 15, creates an instance of the Point class defined in Line?()
Click the Exhibit button. What is the output of the program shown in the exhibit? ()