The key to developing efficient apps is to keep the amount of data on your device to a minimum. Maybe you only need a few hundred records out of a million, or maybe a single aggregate value might represent thousands of entries. When the expressiveness of PowerApps formulas meets the requirement to reduce data movement across the network, DELEGATION is the result. In other words, rather than bringing data to the app for processing locally, Power Apps will delegate data processing to the data source.

The next stage is to limit your use of formulas to those that can be DELEGATED. The formula ELEMENTS that can be delegated are listed here. HOWEVER, each data source is unique, and not all of these elements are supported by all of them. In your specific formula, look for delegation warnings.

• Filtering, searching, and looking up information can all be delegated.
• It's possible to delegate Sort and SortByColumns. The formula in Sort can only be the name of one column and cannot contain any additional operators or functions.
• Sum, Average, Min, and Max are all tasks that can be delegated. At this moment, only a small number of data sources support this delegation; see the delegation list for further information.
  CountRows, CountA, and Count are all counting functions that cannot be delegated.
• StdevP and VarP are two other aggregate functions that cannot be delegated.

As you may be aware, there is a significant need for application development because clients expect fresh developments and advancements. Business organisations are continuing their efforts by ensuring that the correct language is used to implement their initiatives or innovations. As a result, hunting for people who are knowledgeable or skilled has become commonplace these days. And I'm SURE you're hoping to ace the interview and land one of the jobs. These interview questions will undoubtedly assist you in securing a job. 

Useful Resources:

• Power BI Interview Questions
• SharePoint Interview Questions