PowerShell – Interview preparation – 2

Hi All,

Greetings for the day!!!

On Microsoft 365 Junction I am sharing PowerShell questions to help us to prepare interviews.

This is second article in a list. Please check first set of interview questions – PowerShell – Interview preparation – 1 – https://knowledge-junction.in/2024/12/23/powershell-interview-preparation-1/

Q 1. How to declare array object in PowerShell?

• An array is the Data Structure used to store the collection of items
• Items in array can be of same type or of different types
• Creating / Initializing an array
  • By assigning multiple values to variable

$Array = 22,5,10,8,12,9,80

• We will declare empty array object in PowerShell like

           $ArrayObject = @() 

Q 2. How I will make sure “PnP.PowerShell” is installed?

• We will use Get-Module CMDLET

Get-Module PnP.PowerShell

Q 3. Which PnP CMDLET is used to connect the SharePoint site?

• We will Connect-PnPOnline CMDLET
• We have good detailed articles on Connect-PnPOnline PowerShell CMDLET. Please refer REFERENCE section.

#connect to the site
Connect-PnPOnline -Url $SiteURL

Q 4. Which CMDLET is used to read the items from the SharePoint list?

• We will use Get-PnPListItem CMDLET

Get-PnPListItem -List <SharePoint list / library name>

#Get All Site Pages
$SitePages = Get-PnPListItem -List "Site Pages"

Q 5. What is New-Object ?

• New-Object CMDLET is used to create new object
• New-Object cmdlet was introduced in PowerShell v1.0
• Creates an instance of a Microsoft .NET Framework or COM object

New-Object
   [-TypeName] <String>
   [[-ArgumentList] <Object[]>]
   [-Property <IDictionary>]
   [<CommonParameters>]


New-Object
   [-ComObject] <String>
   [-Strict]
   [-Property <IDictionary>]
   [<CommonParameters>]

Q 6. How to get all installed PowerShell modules in my system?

• Using Get-Module with attribute – ListAvailable

PS C:\> Get-Module -ListAvailable

Q 7. How to view all commands from the module?

• Get-Command PowerShell CMDLET is used to view all the commands from the given module.
• Example: Lets see all the PowerShell CMDLET from the module – PnP.PowerShell

Q 8. Which PowerShell module need to import for executing Exchange Online PowerShell CMDLETS?

• ExchangeOnlineManagement PowerShell module

Q 9. How I see all blocked file types in Outlook using PowerShell?

• We have PowerShell CMDLET – “Get-OwaMailboxPolicy ” from ExchangeOnlineManagement PowerShell module
• Steps:
  • Make sure ExchangeOnlineManagement PowerShell module is installed
  • Import the ExchangeOnlineManagement PowerShell module
  • Connect to Exchange Online using PowerShell CMDLET – Connect-ExchangeOnline
  • Execute the PowerShell CMDLET – Get-OwaMailboxPolicy

PS C:\> $owamailboxpolicy = Get-OwaMailboxPolicy

PS C:\> $owamailboxpolicy.BlockedFileTypes

.settingcontent-ms
.printerexport
.appcontent-ms
.application
.appref-ms
.vsmacros
.website
.msh2xml
.msh1xml
.diagcab
.webpnp
.ps2xml
.ps1xml
.mshxml
.gadget
.theme
.psdm1
.mhtml
.cdxml
.xbap
.vhdx
.pyzw

Q 10. What is Error record in PowerShell?

• In PowerShell, when exception / error occurs, it creates one error record
• This error record contain error details like
  • Error message
  • Error stack trace
  • Error category
• In catch block we could display / log error records with $_ as
  • $_.Exception.Message
  • $_.CategoryInfo
  • $_.FullyQualifiedErrorId
  • $_.ScriptStackTrace
• By default error messages are stored in $Error array
• Latest / most recent errors are is at index 0
• When new error is occurred while executing our PowerShell CMDLET, it get stored at $Error [0] and index of other errors increases by 1

We have detailed article on PowerShell exception handling. PowerShell tutorial – exploring Error handling – https://knowledge-junction.in/2024/01/26/powershell-tutorial-exploring-error-handling/

REFERENCES

• PowerShell – Interview preparation – 1 – https://knowledge-junction.in/2024/12/23/powershell-interview-preparation-1/
• Microsoft 365 : Detailed steps using Connect-PnPOnline with Client ID and X509 certificate – https://knowledge-junction.in/2024/11/19/m365-steps-for-connect-pnponline-clientid-n-x509-certificate/
• Microsoft 365 – Few approaches / options for Connecting to tenant using PnP PowerShell – Connect-PnPOnline – Part 1 – https://knowledge-junction.in/2021/12/16/microsoft-365-few-approaches-options-for-connecting-to-tenant-using-pnp-powershell-connect-pnponline-part-1/
• Microsoft 365 – Connecting to tenant using PnP PowerShell – Connect-PnPOnline – exploring DeviceLogIn (Device code flow) parameter- Part 2 – https://knowledge-junction.in/2021/12/18/microsoft-365-connecting-to-tenant-using-pnp-powershell-connect-pnponline-exploring-devicelogin-device-code-flow-parameter-part-2/
• PowerShell tutorial – exploring Error handling – https://knowledge-junction.in/2024/01/26/powershell-tutorial-exploring-error-handling/
• PowerShell tutorial – https://knowledge-junction.in/category/technology-articles/powershell-tutorial/
• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_arrays?view=powershell-7.5

Thanks for reading!!!

HAVE A FANTASTIC TIME AHEAD !!! LIFE IS BEAUTIFUL 🙂