React and SPFx Interview Questions with Scenarios and Code Examples

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Introduction React and SharePoint Framework (SPFx) are popular technologies used in modern web development, especially for building user interfaces and custom web parts in SharePoint. Preparing for interviews involving these technologies requires a solid understanding of core concepts, practical scenarios, and coding proficiency. In this blog, we’ll cover essential interview questions, different scenarios, and code examples to help you ace your React and SPFx interviews. Section 1: React Interview Questions 1. What is the Virtual DOM, and how does it improve performance in React? Scenario: Imagine you’re building a dashboard with multiple widgets that update frequently. How would React's Virtual DOM help optimize performance in this case? Explanation: React uses a Virtual DOM, an in-memory representation of the real DOM. When the state of an element changes, React updates the Virtual DOM first. It then calculates the difference (diffing) between the previous and current states of
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site collection by using Windows PowerShell

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Create a site collection by using Windows PowerShell
You typically use Windows PowerShell to create a site collection when you want to automate the task, which is common in enterprises.
To create a site collection by using Windows PowerShell
  1. Verify that you meet the following minimum requirements: See Add-SPShellAdmin.
  2. On the Start menu, click All Programs.
  3. Click Microsoft SharePoint 2010 Products.
  4. Click SharePoint 2010 Management Shell.
  5. From the Windows PowerShell command prompt (that is, PS C:\>), type the following command and press ENTER:
6.  Get-SPWebTemplate
7.  $template = Get-SPWebTemplate "STS#0"
New-SPSite -Url "<URL for the new site collection>" -OwnerAlias "<domain\user>" -Template $template
This example retrieves a list of all available site templates and then creates a site collection by using the Team Site template. For more information, see New-SPSite and Get-SPWebTemplate.
We recommend that you use Windows PowerShell when performing command-line administrative tasks. The Stsadm command-line tool has been deprecated, but is included to support compatibility with previous product versions.

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