Constructors

Question 1

What is a copy constructor?

Answer 1

A constructor that accpets an instance of it’s class, then copies the object (argument) by setting the class’s attributes, etc. to that of the argument

Question 2

Does C# provide a copy constructor?

Answer 2

No. C# does not provide a copy constructor by default. The developer must create a copy constructor

Question 3

What is a static constructor?

Answer 3

• A static constructor is used to initialize any static data, or to perform a particular action that needs to be performed only once
• Called automatically before the first instance is created or any static members are referenced
• A static constructor is called at most once
• Doesn’t take access modifiers or have parameters
• A class or struct can only have one static constructor
• Cannot invoke static constructor explicitly by the programmer. Only the CLR can invoke it.
• A field declared as static readonly can only be assigned as part of its declaration or in a static constructor

Question 4

Can optional arguments be used with overloaded constructors?

Answer 4

Yes. They can.