多选题Click the Exhibit button. Given： Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）AThe application will crash.BThe code on line 29 will be executed.CThe code on line 5 of class A will execute.DThe exception wil - 搜考题

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题目

多选题

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.

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相似问题和答案

第1题：

Given:Under which three circumstances will the code on line 37 be executed?()

A.The instance gets garbage collected.

B.The code on line 33 throws an exception.

C.The code on line 35 throws an exception.

D.The code on line 31 throws an exception.

E.The code on line 33 executes successfully.

参考答案：B, C, E

第2题：

Click the Exhibit button.Given:What is the result?()

A.Line 26 prints "a" to System.out.

B.Line 26 prints "b" to System.out.

C.An exception is thrown at line 26 at runtime.

D.Compilation of class A will fail due to an error in line 6.

参考答案：A

第3题：

Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit?()

A.Compilation will succeed for all classes and interfaces.

B.Compilation of class C will fail because of an error in line 2.

C.Compilation of class C will fail because of an error in line 6.

D.Compilation of class AImpl will fail because of an error in line 2

参考答案：C

第4题：

1.class TestSuper { 22.TestSuper（int i） { } 3. } 4.class TestSub extends TestSuper{ } 5.class TestAll { 6.public static void main （String [] args） { 7.new TestSub（）； 8.} 9.} Which is true？（）

A、 Compilation fails.
B、 The code runs without exception.
C、 An exception is thrown at line 7.
D、 An exception is thrown at line 2.

正确答案:A

第5题：

Class TestException 1. public class TestException extends Exception { 2. } Class a： 1. public class a { 2. 3. public String sayHello（String name） throws TestException { 4. 5. if（name == null） { 6. throw new TestException（）； 7. } 8. 9. return “Hello “+ name； 10. } 11. 12. } A programmer wants to use this code in an application： 45. A a=new A（）； 46. System.out.println（a.sayHello（”John”））； Which two are true？（）

A、 Class a will not compile.
B、 Line 46 can throw the unchecked exception TestException.
C、 Line 45 can throw the unchecked exception TestException.
D、 Line 46 will compile if the enclosing method throws a TestException.
E、 Line 46 will compile if enclosed in a try block， where TestException is caught.

正确答案:D,E

第6题：

Click the Exhibit button. Given:Which statement is true if a TestException is thrown on line 3 of class B? ()

A.Line 33 must be called within a try block.

B.The exception thrown by method1 in class A is not required to be caught.

C.The method declared on line 31 must be declared to throw a RuntimeException.

D.On line 5 of class A, the call to method2 of class B does not need to be placed in a try/catch block.

参考答案：B

第7题：

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 code on line 5 of class B will execute.

E.The exception will be propagated back to line 27.

参考答案：B, E

第8题：

Given:Which code, inserted at line 15, creates an instance of the Point class defined in Line?()

A.Point p = new Point();

B.Line.Point p = new Line.Point();

C.The Point class cannot be instatiated at line 15.

D.Line l = new Line() ; l.Point p = new l.Point();

参考答案：B

第9题：

1. public class a { 2. public void method1（） { 3. try { 4. B b=new b（）； 5. b.method2（）； 6. // more code here 7. } catch （TestException te） { 8. throw new RuntimeException（te）； 9. } 10. } 11. } 1. public class b { 2. public void method2（） throws TestException { 3. // more code here 4. } 5. } 1. public class TestException extends Exception { 2. } Given： 31. public void method（） { 32. A a=new a（）； 33. a.method1（）； 34. } Which is true if a TestException is thrown on line 3 of class b？（）

A、 Line 33 must be called within a try block.
B、 The exception thrown by method1 in class a is not required to be caught.
C、 The method declared on line 31 must be declared to throw a RuntimeException.
D、 On line 5 of class a， the call to method2 of class b does not need to be placed in a try/catch block.

正确答案:B

第10题：

1. public class A { 2. void A（） { 3. System.out.println（“Class A”）； 4. } 5. public static void main（String[] args） { 6. new A（）； 7. } 8. } What is the result？（）

A、 Class A
B、 Compilation fails.
C、 An exception is thrown at line 2.
D、 An exception is thrown at line 6.
E、 The code executes with no output.

正确答案:E

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