It Transmits electrical currents. You can use it as an amplifier or switch of currents.
Data sheet
Data sheet is what an excel sheet is so it’s the same thing
Answer:
a. Object cannot be converted to Person
Explanation:
This program demonstrates polymorphism.
e.g., a Student IS a Person therefore you can call m() with a Student as well as a Person object.
The same goes for GraduateStudent.
However, and Object is not a Person, so the last call fails. This can be deducted by the type checking that happens at compile time.
The answer would be D, a professional degree (or Ph.D).