# PowerShell 3+ Template $inputFile = ".\data.csv" $requiredYears = 2 $topN = 3 Import-Csv $inputFile | Where-Object [int]$ .YearsOfExperience -ge $requiredYears | Sort-Object [int]$ .Salary -Descending | Select-Object -First $topN | Group-Object Department | Select-Object @Name="Department"; Expression=$ .Name, @Name="AverageSalary"; Expression= Measure-Object Salary -Average).Average, 0) | Sort-Object Department
# Add defensive check $data = Import-Csv .\employees.csv | Where-Object $_.YearsOfExperience -ge 2 if (-not $data) Write-Host "No eligible employees"; exit # then continue... But if they disallow if , use Select-Object with -Skip trickery or rely on Format-Table to output nothing. CSV imports all values as strings. Convert to int before sorting: powershell 3 cmdlets hackerrank solution
| Select-Object Department, @Name="AverageSalary"; Expression=[int]($_.Group Let's assume the CSV file employees.csv looks like this: # PowerShell 3+ Template $inputFile = "
$avgSalary = $grouped.Group | Measure-Object Salary -Average Creates new columns on-the-fly. Convert to int before sorting: | Select-Object Department,
Many candidates struggle not because they don't know PowerShell, but because they try to solve the challenge using traditional text parsing ( awk , sed , or regex -heavy approaches) rather than embracing .
Department AverageSalary ---------- ------------- Finance 100000 IT 85000 The challenge will silently test you on: Case 1: Fewer than 3 eligible employees If only 2 employees have >=2 years experience, your Select-Object -First 3 will return just 2, and Group-Object still works fine. Case 2: One department with multiple top earners If all top 3 are from IT, grouping will show only one row for IT with average salary of those 3. Case 3: Empty dataset If no employee has >=2 years experience, Where-Object outputs $null , and the rest of the pipeline should fail gracefully. HackerRank expects: