You have a parameter $FilePath that must be a non-empty string and match a pattern ending with '.txt'. How do you combine parameter validation attributes to enforce this?

hard📝 Application Q9 of 15

PowerShell - Scripting Best Practices

You have a parameter $FilePath that must be a non-empty string and match a pattern ending with '.txt'. How do you combine parameter validation attributes to enforce this?

A[ValidateLength(11,100)][ValidatePattern('.*\.txt$')] [string]$FilePath

B[ValidateNotNullOrEmpty()][ValidatePattern('.*\.txt$')] [string]$FilePath

C[ValidateSet('*.txt')][ValidateNotNullOrEmpty()] [string]$FilePath

D[ValidateRange(1,100)][ValidatePattern('.*\.txt$')] [string]$FilePath

Step-by-Step Solution

Solution:

Step 1: Ensure parameter is not empty
[ValidateNotNullOrEmpty()] prevents null or empty strings.
Step 2: Use regex to match '.txt' extension
[ValidatePattern('.*\.txt$')] enforces the string ends with '.txt'.
Final Answer:
[ValidateNotNullOrEmpty()][ValidatePattern('.*\.txt$')] [string]$FilePath -> Option B
Quick Check:
Combine NotNullOrEmpty and Pattern for non-empty matching strings [OK]

Quick Trick: Use ValidatePattern with regex and ValidateNotNullOrEmpty together [OK]

Common Mistakes:

Using ValidateSet for file extensions
Applying ValidateRange to strings
Missing NotNullOrEmpty check

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You have a parameter $FilePath that must be a non-empty string and match a pattern ending with '.txt'. How do you combine parameter validation attributes to enforce this?

Step 1: Ensure parameter is not empty

Step 2: Use regex to match '.txt' extension

Final Answer:

Quick Check:

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