PowerShell

Question 0

The $ sign does what in variables?

Answer 0

Gets the contents of that variable. Also can be used to do things with the contents of the variable.

Question 1

After executing break. What statements after the break cmd will be executed?

Answer 1

If, else if, and if statements

Question 2

What does the global scope represent?

Answer 2

The entire shell

Question 3

Whenever you run a script is a scope created for it?

Answer 3

Yes a separate on for the script

Question 4

Do functions get their own scope too?

Answer 4

Yes they do

Question 5

What is used to express relationships between scopes in powershell

Answer 5

Parent child type of relationship

Question 6

If the value is being read and after going to global scope, and nothing is found what happens?

Answer 6

You get an error or a default value is used such as a empty string for variable $x

Question 7

When you write a value, what scope does it take place in?

Answer 7

The current scope

Question 8

When your done using a variable in a scope, does the same variable get destroyed in the other scopes? why?

Answer 8

No because the other scopes have their own copy and could have their own values.

Question 9

When reading in a scope can you go down the path to child scopes?

Answer 9

No parent scopes aren’t allowed to do that.

Question 10

Can each scope create elements with the same name as other scopes?

Answer 10

Yes it can for example aliases such as d in global and another d in script scope.

Question 11

What is a best practice for scopes?

Answer 11

Let the scope be a wall, don’t start reaching into other ones, can make it very confusing.

Question 12

What is another best practice?

Answer 12

Never access anything outside your own scope

Question 13

best practice on undefined variable accessing?

Answer 13

Never access a variable that hasn’t been defined in your own scope yet

Question 14

What should be used to pass info in and out of scopes?

Answer 14

A parameter to get info into the scope. And a write-output to pass info out of the scope

Question 15

What does a cmdlet binding attribute do?

Answer 15

it changes your simple parametrized function into a advanced function. Some call it a script cmdlet.

Question 16

How does the parameter decorater go?

[Parameter()]

Answer 16

Goes on a per parameter basis

Question 17

If you have an array [] in your powershell script, and add a single item, will it fail?

Answer 17

No powershell will take that one item and make your array, an array of one item.

Question 18

What parameter description will accept input from pipeline?

Answer 18

ValueFromPipeline=$True

Of course you can probably go false but haha no reason to do that, probably don’t even let you do that.

Question 19

Any script or function that accepts input from the pipeline needs to have three named script blocks. What are they?

Answer 19

Begin{}
Process{}
End{}