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LINQ interview questions

LINQ interview questions.

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  • 1.

    What are the types of LINQ?

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  • 2.

    Explain what is LINQ? Why is it required?

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  • 3.

    What is LINQ?

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  • 4.

    What is LINQ in C#?

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  • 5.

    List out the three main components of LINQ?

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  • 6.

    What are Anonymous Types?

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  • 7.

    What is Anonymous function?

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  • 8.

    In LINQ how will you find the index of the element using where() with Lambda Expressions?

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  • 9.

    Explain how LINQ is useful than Stored Procedures?

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  • 10.

    Explain what is the purpose of LINQ providers in LINQ?

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  • 11.

    Explain what is “LINQ to Objects”?

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  • 12.

    Explain why SELECT clause comes after FROM clause in LINQ?

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  • 13.

    What are Extension Methods?

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  • 14.

    Mention what is the role of DataContext classes in LINQ?

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  • 15.

    Filter out the first 3 even numbers from the list using LINQ

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  • 16.

    Explain what are LINQ compiled queries?

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  • 17.

    Could you explian what is the exact deference between deferred execution and Lazy evaluation in C#?

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  • 18.

    When to use First() and when to use FirstOrDefault() with LINQ?

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  • 19.

    Explain how standard query operators useful in LINQ?

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  • 20.

    Define what is Let clause?

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  • 21.

    Could you compare Entity Framework vs LINQ to SQL vs ADO.NET with stored procedures?

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  • 22.

    Explain what is lambda expressions in LINQ?

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  • 23.

    What is the difference between First() and Take(1)?

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  • 24.

    What is Expression Trees and how they used in LINQ?

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  • 25.

    When trying to decide between using the Entity Framework and LINQ to SQL as an ORM, what's the difference?

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  • 26.

    Explain what is the difference between Skip() and SkipWhile() extension method?

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  • 27.

    Get the indexes of top n items where item value = true

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  • 28.

    Using LINQ to remove elements from a List

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  • 29.

    What is an equivalent to the "let" keyword in chained LINQ extension method calls?

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  • 30.

    When should I use a CompiledQuery?

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  • 31.

    Name some advantages of LINQ over Stored Procedures

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  • 32.

    What are the benefits of a Deferred Execution in LINQ?

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  • 33.

    What are the benefits of a Deferred Execution in LINQ?

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  • 34.

    Name some disadvantages of LINQ over sprocs

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  • 35.

    What is the difference between Select and SelectMany?

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  • 36.

    Why use .AsEnumerable() rather than casting to IEnumerable?

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  • 37.

    What is the difference between returning IQueryable vs. IEnumerable?

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  • 38.

    Can you provide a concise distinction between anonymous method and lambda expressions?

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. CAP Theorem
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