Practicing and exploring

Test your knowledge and understanding by answering some questions, get some hands-on practice, and explore with deeper research into the topics covered in this chapter.

Exercise 11.1 – Test your knowledge

Answer the following questions:

1. What are the two required parts of LINQ?
2. Which LINQ extension method would you use to return a subset of properties from a type?
3. Which LINQ extension method would you use to filter a sequence?
4. List five LINQ extension methods that perform aggregation.
5. What is the difference between the Select and SelectMany extension methods?
6. What is the difference between IEnumerable<T> and IQueryable<T>? And how do you switch between them?
7. What does the last type parameter T in generic Func delegates like Func<T1, T2, T> represent?
8. What is the benefit of a LINQ extension method that ends with OrDefault?
9. Why is query comprehension syntax optional?
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