Angular Interview Questions and Answers 2024 (Real interview) | Angular 18

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 Ref Vs Out with real time example C# 13 | .NET 9

"In this video, we explore the key differences between the ref and out parameters in C#. Learn when to use each keyword, how they behave, and common interview questions related to ref and out. Whether you’re preparing for a tech interview or looking to strengthen your C# skills, this tutorial covers everything you need to know! Don’t forget to like, subscribe, and hit the notification bell for more programming content. Let's master C# together!" https://youtu.be/KW8oM4f8W00

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What is .NET Core, and how does it differ from the .NET Framework?

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First Vs FirstOrDefault in C# | ABFirstTech

C#FindTwoLargestNumbersFromArrayusingLoop

https://youtu.be/EB_VP82Z94w?si=a2_KRbtP0ICZyUdI

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In this video, learn how to find the second largest element in an array using C#. We'll explore different approaches to get the second highest number, including reading from the array, sorting, and identifying the top two largest values. Perfect for beginners looking to enhance their C# array handling skills and learn efficient ways to solve this common problem. Watch now to improve your C# programming techniques!

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Really Don't Use FirstOrDefault in .NET?

Don't Use FirstOrDefault in .NET ?

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C# Performance of

Find() vs. FirstOrDefault()

https://youtu.be/sMD02dUghrg

C# Performance of

Find() vs. FirstOrDefault()

 

Find

•  Designed for collections with direct access by index or key (like arrays or lists implementing IList). It retrieves an element based on a specific condition.
• Use Case: When you have a collection of objects and want to retrieve an object based on a unique identifier.

List numbers = new List { 1, 2, 3, 4, 5 };

int result = numbers.Find(x => x > 3); 

 

FirstOrDefault Method

• Use Case: When you want to find the first item that meets a certain condition in a collection.
• Example: Suppose you have a list of employees and want to find the first employee in the "Sales" department.

var employeeList = new List<Employee>(); var salesEmployee = employeeList.FirstOrDefault(e => e.Department == "Sales");

 

Summary

• Find:
• Suitable for lists or arrays with direct index/key access.
• Efficient for retrieving an item by a specific identifier.
• Find based on primary key
• With out querying the Database
• FirstOrDefault:
• Works with LINQ and any IEnumerable.
• It always queries the database
• Ideal for getting the first item that matches a condition or a default if no matches exist.

Key Differences:

• FirstOrDefault:
• Runs through the IEnumerable interface, typically using a foreach loop, which adds overhead.
• List<T>.Find:
• Not part of LINQ; it likely uses a standard for loop directly on the internal array, making it faster and more efficient for searching.

In essence, Find is optimized for performance on lists, while FirstOrDefault provides more flexibility with IEnumerable.

 

Conclusion

Both List<T>.Find() and Enumerable.FirstOrDefault() are effective for searching elements in collections, each with its own advantages:

• Performance: List<T>.Find() is typically marginally faster when working with List<T> due to direct access and potential optimizations.
• Flexibility: FirstOrDefault() offers broader applicability across different collection types and integrates seamlessly with LINQ queries.
• Use Case Fit: Choose Find() for list-specific, performance-critical scenarios, and FirstOrDefault() for more general, LINQ-based operations.

 

Transient, Scoped, and Singleton type of dependency Injection and Differ...

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Singleton - One instance of a resource, reused anytime it's requested. Scoped - One instance of a resource, but only for the current request. New request (i.e. hit an API endpoint again) = new instance. Transient - A different instance of a resource, everytime it's requested

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