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C# Interview Quiz: Collections, LINQ and Delegates

Step 19 of 31 · C# Interview Preparation for Beginners · Stage 4: Collections, generics and LINQ

C# Interview Quiz: Collections, LINQ and Delegates

Ten interview-style questions on dictionary keys, collection pitfalls, deferred LINQ execution, generics, closures and events.

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In this collection

Stage 1: Start here
1C# Interview Roadmap for Beginners: A 30-Day PlanArticle
Stage 2: Language fundamentals
2C# vs .NET vs the CLR: How C# Code RunsArticle
3Value Types, Reference Types and Boxing in C#Article

4

Strings in C#: Immutability, StringBuilder and Comparison

Article

5Reverse a String and Check a PalindromecsharpSnippet

6Character Frequency Counter with a DictionarycsharpSnippet

Stage 3: Object-oriented programming

7OOP in C#: Inheritance, Polymorphism and AbstractionArticle

8virtual, override and new: Method Hiding DemocsharpSnippet

9Modern C#: Records, Structs, Pattern Matching and Extension MethodsArticle

10C# Interview Quiz: Types, Strings and OOP10 questions · Easy · 15 minQuiz

Stage 4: Collections, generics and LINQ

11C# Collections: Arrays, List, Dictionary and HashSetArticle

12C# Generics: Constraints and Why They Beat objectArticle

13Delegates, Events and Lambdas in C#Article

14LINQ in C#: Querying CollectionsArticle

15Top Words with LINQcsharpSnippet

16Two Sum with a DictionarycsharpSnippet

17Group and Total with LINQcsharpSnippet

18Second Highest Distinct Salary with LINQcsharpSnippet

19C# Interview Quiz: Collections, LINQ and Delegates10 questions · Medium · 20 minQuiz

Stage 5: Exceptions, memory and async

20C# Exceptions and IDisposable: try, catch, finally and usingArticle

21Garbage Collection and Memory in .NETArticle

22Async and Await in C#: A Practical GuideArticle

23Retry with Exponential BackoffcsharpSnippet

24Balanced Parentheses with a StackcsharpSnippet

25C# Interview Quiz: Exceptions, Memory and Async10 questions · Medium · 20 minQuiz

Stage 6: Design, testing and interview readiness

26Dependency Injection, SOLID and Unit Testing in C#Article

27A Unit Test in Arrange-Act-Assert Style (xUnit)csharpSnippet

2825 C# Mistakes Freshers Make in InterviewsArticle

2930 C# Coding Interview Problems for FreshersArticle

30Top 50 C# Interview Questions for Freshers (with Answers)Article

31C# and .NET Fundamentals10 questions · Medium · 20 minQuiz