Which keyword indicates a method belongs to the class, not an instance?

Empty parentheses in a method declaration mean:

Which is true about the ref parameter?

out parameters require that:

What is in used for?

Can you overload two methods that differ only by ref vs out?

Overloading is allowed if one method has ref/out and the other has no modifiers.

Which modifier allows passing by reference without modification?

Are async methods allowed to have ref, out, or in parameters?

Why can’t properties be passed via ref or out?

Which of these is a valid overload pair?

What error occurs if overload conflicts with only ref vs out difference?

You must use the same modifier (ref/out/in) at the call site as in the method’s signature (except in optional).

Is the return type relevant when invoking overloaded methods?

For ref readonly, at the call site you can use:

Which of the following is not allowed in extension methods?

Method parameters are always separated by:

A method defined with => x * x; is known as:

Instance methods require:

Return type is part of the signature when overloading methods.

A static method can't access instance members without an object.

Caller must initialize an out variable before calling the method.

in prevents modification of the argument inside the method.

You can overload methods that differ only by ref vs. out.

Overloading is possible if one method uses ref and another has no modifiers.

Async methods cannot have ref, out, or in parameters.

ref readonly parameters cannot be read inside the method.

You must use ref, out, or in at the call site exactly as in the definition (except optional in).

Properties can be passed to methods via ref or out.

out parameters can be declared inline at the call site starting C# 7.0.

The in modifier may allow the compiler to pass by value via temporary variable.

Named arguments must come after positional arguments when mixing.

A method with no parameters uses empty parentheses.

Extension methods can use out on the first parameter.

Overload resolution considers only parameter types and modifiers, not return type.

Using too many overloads can confuse which is called.

ref readonly makes an argument immutable within the method.

Generic method constraints are part of the method signature for overloading.

Multiple constructors provide better extensibility than optional parameters.