[Solved] You want to write a script that tries to get a file, and if it fails, clears the error list and logs the error message only once. Which code snippet correctly uses $Error to achieve this? | PowerShell

PowerShell - Error Handling

You want to write a script that tries to get a file, and if it fails, clears the error list and logs the error message only once. Which code snippet correctly uses $Error to achieve this?

A<pre>Try { Get-Item 'C:\file.txt' } Catch { $Error.Clear(); Write-Output $Error[0].Exception.Message }</pre>

B

<pre>Try { Get-Item 'C:\file.txt' } Catch { Write-Output $Error.Clear(); Write-Output $Error[0].Exception.Message }</pre>

C

<pre>Get-Item 'C:\file.txt' -ErrorAction SilentlyContinue; Write-Output $Error[0].Exception.Message; $Error.Clear()</pre>

D

<pre>Try { Get-Item 'C:\file.txt' } Catch { $msg = $Error[0].Exception.Message; $Error.Clear(); Write-Output $msg }</pre>

Step-by-Step Solution

Solution:

Step 1: Identify correct error handling and clearing order
```
Try { Get-Item 'C:\file.txt' } Catch { $msg = $Error[0].Exception.Message; $Error.Clear(); Write-Output $msg }
```
captures the error message from $Error[0], then clears the error list, then outputs the message.

Step 2: Check other options for mistakes

Try { Get-Item 'C:\file.txt' } Catch { Write-Output $Error.Clear(); Write-Output $Error[0].Exception.Message }

clears errors before reading message (wrong order).

Get-Item 'C:\file.txt' -ErrorAction SilentlyContinue; Write-Output $Error[0].Exception.Message; $Error.Clear()

does not use Try-Catch and may fail silently.

Try { Get-Item 'C:\file.txt' } Catch { $Error.Clear(); Write-Output $Error[0].Exception.Message }

clears errors before reading message, losing the error.

Final Answer:
Try { Get-Item 'C:\file.txt' } Catch { $msg = $Error[0].Exception.Message; $Error.Clear(); Write-Output $msg } -> Option D
Quick Check:
Read error before clearing $Error [OK]

Quick Trick: Always read $Error before calling $Error.Clear() [OK]

Common Mistakes:

Clearing $Error before reading error message
Not using Try-Catch for error handling
Expecting $Error to update immediately without Try-Catch

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More PowerShell Quizzes

You want to write a script that tries to get a file, and if it fails, clears the error list and logs the error message only once. Which code snippet correctly uses $Error to achieve this?

Step 1: Identify correct error handling and clearing order

Step 2: Check other options for mistakes

Final Answer:

Quick Check:

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