Practicing and exploring

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

Exercise 8.1 – Test your knowledge

Use the web to answer the following questions:

1. What is the maximum number of characters that can be stored in a string variable?
2. When and why should you use a SecureString type?
3. When is it appropriate to use a StringBuilder class?
4. When should you use a LinkedList<T> class?
5. When should you use a SortedDictionary<T> class rather than a SortedList<T> class?
6. In a regular expression, what does $ mean?
7. In a regular expression, how can you represent digits?
8. Why should you not use the official standard for email addresses to create a regular expression to validate a user's email address?
9. What characters are output when the following code runs?

string city = "Aberdeen";
ReadOnlySpan<char> citySpan = city.AsSpan()[^5..^0]...