What is the purpose of the ref keyword in C#?

Which of the following describes a C# interface?

The C# statement: using System; means...

If you are overloading methods in a class the methods must have...

var x = default(DateTime); What is the expected value of 'x'?

When the protected modifier is used on a class member,

What is an object in C#?

How does the async keyword work?

Which choice best describes a deadlock situation?

What is the difference between a.Equals(b) and a == b?

When would you use a Dictionary rather that an Array type in your application?