READ Free Dumps For Microsoft- 70-480
| Question ID 14838 | You are developing an application that uses a third-party JavaScript library named
doWork().
The library occasionally throws an "object is null or undefined" error with an error code of
-2146823281.
The application must:
✑ Extract and handle the exceptions thrown by doWork()
✑ Continue normal program execution if other exceptions occur
You need to implement the requirements.
Which code segment should you use?
|
| Option A | Option A
|
| Option B | Option B
|
| Option C | Option C
|
| Option D | Option D
|
| Correct Answer | C |
Explanation
| Question ID 14839 | You are developing an application that uses a third-party JavaScript library named
doWork().
The library occasionally throws an "object is null or undefined" error with an error code of
-2146823281.
The application must:
✑ Extract and handle the exceptions thrown by doWork()
✑ Continue normal program execution if other exceptions occur
You need to implement the requirements.
Which code segment should you use?
|
| Option A | Option A
|
| Option B | Option B
|
| Option C | Option C
|
| Option D | Option D
|
| Correct Answer | C |
Explanation Explanation: * The try statement lets you test a block of code for errors. The catch statement lets you handle the error. The JavaScript statements try and catch come in pairs: try { Block of code to try } catch(err) { Block of code to handle errors } * object.number [= errorNumber] Returns or sets the numeric value associated with a specific error. The Error object's default property is number. * Example: The following example causes an exception to be thrown and displays the error code that is derived from the error number. try { // Cause an error. var x = y; } catch(e) { document.write ("Error Code: "); document.write (e.number & 0xFFFF) document.write ("
"); document.write ("Facility Code: ") document.write(e.number>>16 & 0x1FFF) document.write ("
"); document.write ("Error Message: ") document.write (e.message) } The output of this code is as follows. Error Code: 5009 Facility Code: 10 Error Message: 'y' is undefined Reference: JavaScript Errors - Throw and Try to Catch; number Property (Error) (JavaScript)