preface : I wanted to use pictures , As a result, if you can't send it out, you can use words .

one , exception handling - task

exception handling - task

Question quantity : 10  Full mark : 100

one . Single choice questions ( common 8 topic ,80 branch )

1. ( Single choice questions )

In method , The keyword used when throwing an exception object is (     )

* A. throw
* B. catch
* C. finally
* D. throws
My answer : A right key : A

10 branch

Answer analysis :

2. ( Single choice questions )

When customizing exception class , The classes that can be inherited are (     )

* A. Error
* B. Applet
* C. Throwable,Exception And its subclasses
* D. AssertionError
My answer : C right key : C

10 branch

Answer analysis :

3. ( Single choice questions ) For statements that have been defined and may throw exceptions , When programming (      ).

* A. Must use try/catch Statement handling exception , Or use throws Throw it out in the method header declaration .
* B. If the program is wrong , Must use try/catch Statement handling exception .
* C. You can ignore it .
* D.
Only use try/catch Statement processing .

My answer : A right key : A

10 branch

Answer analysis :

4. ( Single choice questions )catch Can only be captured in a statement (    ) Object of type

* A. Throwable
* B. Object
* C. Exception
* D. RuntimeException
My answer : C right key : C

10 branch

5. ( Single choice questions ) The statements that catch exceptions in methods are (    )

* A. try
* B. catch
* C. throw
* D. StackTrace
My answer : B right key : B

10 branch

6. ( Single choice questions ) about catch Arrangement of exceptions in Clause , Which of the following is true (  ) 

* A. Parent class exception first , Subclass exception after
* B. Subclass exception first , Parent class exception after
* C. Exceptions with inheritance cannot be in the same try In program segment
* D.  Exceptions can be arranged in any order , It has nothing to do with order
My answer : A right key : B

0 branch

7. ( Single choice questions )

Based on the following code , analysis method() Output of method after exception .

private static void try() {

    try {

      System.out.println("A");

      method(); // Runtime exceptions may be thrown

      System.out.println("B");

      return;   

    } catch (Exception e) {

      System.out.println("D");

    } finally {

      System.out.println("E");

    }

    System.out.println("F");

    return;

  }

* A.
A

B

D

E

F

* B.
A

D

B

* C.
A

D

E

F

* D.
A

B

My answer : C right key : C

10 branch

Answer analysis :

8. ( Single choice questions )

Based on the following code , analysis method() The output result after the method does not throw an exception .

private static void try() {

    try {

      System.out.println("A");

      method(); // Runtime exceptions may be thrown

      System.out.println("B");

      return;     

    } catch (Exception e) {

      System.out.println("D");

    } finally {

      System.out.println("E");

    }

    System.out.println("F");

    return;

  }

* A.
A

B

E

* B.
A

B

E

F

* C.
A

B

* D. None of it
My answer : B right key : B

10 branch

Answer analysis :

two . Judgment question ( common 2 topic ,20 branch )

9. ( Judgment question )

Java Once an exception occurs in the program, the whole program will be terminated .

* A. yes
* B. wrong
My answer :  Wrong or correct answer :  wrong

10 branch

10. ( Judgment question )

RuntimeException Runtime exceptions must be explicitly captured and handled

* A. yes
* B. wrong
My answer :  Wrong or correct answer :  wrong

10 branch

 

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