Question $7(1$ point$)$

Which of the following is NOT a language requirement to support abstract data types?

There should be general built$-$in operations that accept objects of abstract data types.

The language's syntax should have a single syntactic unit that is used to encapsulate the type definition.

A mechanism should exist to make subprogram headers and type names visible to clients while keeping definitions hidden.

The language must support a set of primitive data types.

Question $8(1$ point$)$

Which of the following are bound to heap storage only when they are assigned values?

Stack$-$dynamic variables

Explicit heap$-$dynamic variables

Implicit heap$-$dynamic variables

Static variables