SQL Server 2008 - UDF Parameter Types And Return Types

Question

I often stumble at the following while writing UDFs in SQL 2008. Please tell me whether my following assumptions are right or wrong.

1. A UDF can return Data Table.
2. But a UDF can't receive a Data Table as a parameter.
3. A UDF can receive an User-Defined-Table- Type(UDTT) as a parameter.
4. But a UDF can't return an User-Defined-Table-Type(UDTT).

Answer 1

1. Right
2. Right (if you mean - real existing table, not table typed variable)
3. Right
4. Right

Answer 2

1. Right.
2. Right.
3. Right, unless it is a CLR UDF.
4. Right.

Answer 3

1. table valued functions can, no scalar ones
2. Correct
3. Correct
4. Correct