PowerShell Genie

Take the first three service names in PowerShell

Exercise 2 min read Windows PowerShell 5.1 and PowerShell 7

Documentation: Microsoft Learn

Write a pipeline, run it against the sample data, and check your result.

An example to inspect

Read the example, then complete the activity below. All lessons are public. Sign-in is optional for progress sync.

Get-Service | Sort-Object Name | Select-Object -First 3

Target

Sort service names alphabetically, then return the first three.

Expected result

BITS, Dnscache, EventLog

Try the task

Show a worked solution
Reveal one approach
1PS> Get-Service | Sort-Object Name | Select-Object -First 3

Try it in the lab

Write your pipeline below and run it against the fictional sample data, then check your result against the expected answer.

Interactive simulation · fictional data

PowerShell skills

Service objects · Sorting · Selection · Top-N results

Build the answer in three decisions

Read the pipeline from left to right. Each stage receives objects from the stage before it.

Collect

Get-Service

Start with 7 fictional service objects. Keep them as objects so later stages can inspect their properties.

Shape

Sort-Object Name

Apply the condition or ordering required by the task. Sort before limiting.

Verify

Check order and returned names

The fixture should return BITS, Dnscache, EventLog. Order matters for this exercise.

Reason through the pipeline

The source stage returns 7 service objects. Then the pipeline applies Sort-Object Name, Select-Object -First 3 without converting the objects to display text. That keeps the Name property available for the checker and for any later pipeline stage.

Why common attempts fail

Do not select the first rows before sorting when the task asks for a highest, lowest, first, or reverse-ordered result. Use Select-Object after the important filtering or ordering work; selecting too early can discard properties needed by later stages.

What the checker accepts

The evaluator runs the supported subset against the same fictional fixture. It expects BITS, Dnscache, EventLog. The returned order is part of the answer. Equivalent supported syntax is accepted.

Verify another attempt

First run Get-Service by itself and inspect the fixture. Then add one stage at a time and compare how many objects remain. This isolates the stage that changes the result and makes the final pipeline easier to explain and debug.

Primary documentation

PowerShell pipeline behavior

Next exercise
Genie guideTake the first three service names in PowerShell

Write a pipeline, run it against the sample data, and check your result.