Questions

1. What are the main benefits of adding types to JavaScript?
2. Is it possible to get the type of a TypeScript variable at runtime? How?
3. At the moment, is there any chance the TypeScript team will add something like C# operator overloading so users may define custom behavior for + and - when applied to their custom types? Why?
4. Is there a way to define a variable that might contain both numbers and strings? What is the best way to do it?
5. What is the return type of a function that returns no value?
6. What is the scope of a variable that has not been declared?
7. How many instances of the counter variable are generated by a var-based for loop that iterates 100 times? How many instances are generated by the let version of the same loop?
8. Is this assertion true: TypeScript string variables are always allowed to have a null value? Explain.
9. What is the most space-efficient way to define an enum (the one that generates the least code and requires the least runtime memory)?
10. How do you declare that the values of an enum are C#-like bit flags?