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In this lecture I’m gonna give you the answers to the questions, from the Command Syntax Section.

We’ll take a look at the command syntax from get service

The Answer is in 6 parts, we’ll start from the left and work to the right

Every cmdlet is based upon the same structure A name for this structure is? Verb - Noun
A dash tells PowerShell that a Parameter is being used.
Two angle brackets tell’s me that this a Argument.
The word string is located between two angle brackets, string is called a Value Type.
When two square brackets are surrounded by two angle brackets this tells us that this can take multiple arguments separated by a comma.
These three groups are called _Parameter sets.

**Question 2 video and tablet **

The question was:

Take a look at the parameter sets from get-service. Can you tell me which parameters are unique in each set? Now tell me what parameters are common in each set.

**The answer is in three parts. **

In order to have a parameter set each set must have at least one unique parameter. Our unique parameters in this case are:
Displayname from set #1
Inputobject from set # 2
Name from # 3

**Question 2 Part 2 **

Question was:
Now tell me what parameters are common to each set.

The Common Parameters in Set # 1,2, 3 are:

Computername, DependentServices, Exclude, Include, RequiredServices, Common Parameters

**Question 2 Part 3 **

The Question was:

You probably noticed that commonparameters are common to all three sets.

What command would you use to checkout the help for commonparameters?
Type get-help about_common_parameters.

Scroll to the top.

Some of the highlights are debug, outvariable, verbose, whatif and confirm
If you want to know more notice there are descriptions for each parameter.
Most of the time these parameters work with every cmdlet.

Question # 3

The Question was:
If I type get-service , then press return.

Why does the command run without using any parameters?

Type CLS

Type **get-help get-service -full. **
Now using the syntax, explain why getservice** ran** without using any parameters.

The answer is:

Because all the parameters in parameter set # 2 and 3, all have square brackets around them.
That means that all the parameters are optional and not needed.

And that means that get-service will run by itself without any parameters.

**Question #4 **

The question was:

**Type get-eventlog, then press return. **

Notice that geteventlog is asking for a value or a logname

Press Ctrl-C

Using the syntax, explain why geteventlog requires you to type a value or a logname, while get-service ran without a value or even a parameter
Type get-help get-eventlog -full. Scroll up to the Syntax section.
Notice that every parameter is surrounded by square brackets.
That means that all the parameters for the command get-eventlog are optional and not needed.
Notice that -logname is surrounded by square brackets but the argument is not.

That means that -logname is optional (you don’t have to type -logname)

but you have to type a string (which in this case is a text string)

So that’s why when you type get-eventlog and you press return

PowerShell asks you for a value.

Let’s go ahead and type security (which is one of the Windows log files.

**Question #5 **

The Question was:
Using help get-eventlog -showwindow.
Take a look at the parameter -instanceID .
Explain why -instanceID should be second in the order of parameters?

-InstanceID <int64> is position 1 so it’s second in the lineup of parameters.

-logname <string> is position 0 so that makes it first in the lineup

So, the thing to remember is that PowerShell starts the lineup of parameters at position 0

Question #6

Let’s scroll down to newest.

The question was:
Why can you place –newest, anywhere, in the order of parameters?

\- Newest <Int32> The position for -newest is named.

That means you can put it anywhere in the lineup.

Thanks for checking out the questions and answers in this section.

Command Syntax Lab Answers