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C# Interview Questions

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41.

Explain generic constraints in C#.

intermediate

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42.

What is the difference between IEnumerable and IEnumerator?

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43.

Explain the difference between `IEnumerable<T>` and `IQueryable<T>`.

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44.

What is the difference between `throw` and `throw ex`?

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45.

What are custom exceptions and when should you create them?

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46.

Explain the using statement and IDisposable interface.

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47.

What is the difference between System.Exception and System.ApplicationException?

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48.

What is deferred execution in LINQ?

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49.

Explain the difference between `First()`, `FirstOrDefault()`, `Single()`, and `SingleOrDefault()`.

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50.

Explain `GroupBy` in LINQ with an example.

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51.

What is the difference between `Select` and `SelectMany`?

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52.

Explain `Join` operations in LINQ.

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53.

What are delegates in C# and how do they work?

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54.

Explain the difference between `Func`, `Action`, and `Predicate` delegates.

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55.

What are events and how are they different from delegates?

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56.

Explain event handling patterns in C#.

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57.

Explain `async` and `await` keywords.

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58.

Explain `ConfigureAwait(false)` and when to use it.

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59.

What is the difference between `Task.Run()` and direct async method call?

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60.

Explain parallel programming with `Task.WhenAll` and `Task.WhenAny`.

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Showing 41 to 60 of 99 results

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