初级软件工程师面试题 Junior Software Engineer Interview

What is an ArrayList? Hashtable?
Disadvantages of each?
What would you use instead? Explain why.
What are the uses for the “using” keyword in C#?
What interface is involved in one use of “using?”
What is an interface?
What do the access modifiers “abstract” and “sealed” mean?
In SQL, what’s the difference between an Inner and an Outer Join?