Switch with wildcard and regex in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to match the input using a wildcard pattern in the switch statement.

PowerShell

switch -Wildcard ($input) {
    [1] { Write-Output "Matched wildcard pattern" }
    default { Write-Output "No match" }
}

Drag options to blanks, or click blank then click option'

A"hello?"

B"^hello.*$"

C"hello*"

D"*world"

Attempts:

3 left

💡 Hint

Common Mistakes

Using regex pattern with -Wildcard instead of a wildcard pattern.

Forgetting to put the pattern in quotes.

The -Wildcard parameter expects a wildcard pattern like "hello*" to match strings starting with 'hello'.

2fill in blank

medium

Complete the code to match the input using a regex pattern in the switch statement.

PowerShell

switch -Regex ($input) {
    [1] { Write-Output "Matched regex pattern" }
    default { Write-Output "No match" }
}

Drag options to blanks, or click blank then click option'

A"^hello.*$"

B"hello*"

C"hello?"

D"*world"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wildcard pattern with -Regex instead of a regex pattern.

Not anchoring the regex pattern properly.

The -Regex parameter expects a regex pattern like '^hello.*$' to match strings starting with 'hello'.

3fill in blank

hard

Fix the error in the switch statement to correctly match input ending with 'end' using wildcard.

PowerShell

switch -Wildcard ($input) {
    [1] { Write-Output "Ends with 'end'" }
    default { Write-Output "No match" }
}

Drag options to blanks, or click blank then click option'

A"end*"

B"*end"

C"?end"

D"*en"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'end*' which matches strings starting with 'end' instead of ending.

Using '?' which matches exactly one character.

The wildcard '*end' matches any string ending with 'end'.

4fill in blank

hard

Fill both blanks to match input starting with 'start' using regex and containing digits.

PowerShell

switch -Regex ($input) {
    [1] { Write-Output "Starts with start" }
    [2] { Write-Output "Contains digits" }
    default { Write-Output "No match" }
}

Drag options to blanks, or click blank then click option'

A"^start"

B"\d+"

C"start$"

D"[a-z]+"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start$' which matches strings ending with 'start'.

Using '[a-z]+' which matches letters but not digits.

The pattern '^start' matches strings starting with 'start'. The pattern '\d+' matches strings containing one or more digits.

5fill in blank

hard

Fill all three blanks to create a switch that matches input exactly 'yes', matches input containing 'no' anywhere, and matches input starting with 'maybe' using regex.

PowerShell

switch -Regex ($input) {
    [1] { Write-Output "Exact yes" }
    [2] { Write-Output "Contains no" }
    [3] { Write-Output "Starts with maybe" }
    default { Write-Output "No match" }
}

Drag options to blanks, or click blank then click option'

A"^yes$"

B"no"

C"^maybe"

D"yes"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'yes' without anchors matches any string containing 'yes', not exactly 'yes'.

Using '^no' which matches strings starting with 'no' only.

The pattern '^yes$' matches exactly 'yes'. The pattern 'no' matches any string containing 'no'. The pattern '^maybe' matches strings starting with 'maybe'.