Question & Answer: (TCO 7) Instances of a(n) _____ cannot be created……

Question 1
2 pts
(TCO 7) Instances of a(n) _____ cannot be created.

abstract class

public function

pure virtual function

public class

Question 2
2 pts
(TCO 7) What is an abstract class?

A generalized class used only to create related derived classes

A class without any superclasses

Any subclass with more than one superclass

A class from which we create many instances

Question 3
2 pts
(TCO 7) Which of the following statements is false?

Pure virtual functions are inherited.

If a derived class extends an abstract base class, the derived class must implement the pure virtual functions declared in the abstract base class.

Any method in an abstract class is considered a pure virtual function.

A pure virtual function is a function without function implementation and can be found in an abstract class.

Question 4
2 pts
(TCO 7) Which of the following classes is most likely an abstract class?

EvoCellPhone

Rose

Building

FijiApple

Question 5
2 pts
(TCO 7) In terms of object-oriented programming, a contract is a mechanism that forces a programmer to adhere to a predefined application programming interface or _____.

class declaration

object instantiation method

framework

method signature

None of the above

Question 6
2 pts
(TCO 7) Which is the prototype for a pure virtual function in class TVGame called StartGame which has no inputs and returns a bool?

bool virtual StartGame()

bool virtual TVGame::StartGame(string) = 0;

virtual bool TVGame::StartGame() {}

virtual bool StartGame() = 0;

Question 7
2 pts
(TCO 7) C++ allows for the implementation of multiple inheritance, whereas .Net and Java do not. However, in languages such as .Net and Java, _____ can be used to simulate multiple inheritance.

base classes

interfaces

abstract methods

implementations

Question 8
2 pts
(TCO 7) Which of the following classes represent an abstract class?

class Plant {
virtual void grow (){}
}

class Plant {
virtual void grow ();
}

class Plant {
virtual void grow (){}
}

class Plant {
virtual void grow()=0;
}

Question 9
2 pts
(TCO 7) Which of the following declares an abstract method in an abstract C++ class?

public: virtual void print() {}

public: virtual void print()=0;

public: void print() {}

public: void print();

Question 10
2 pts
(TCO 7) Assume the function area is a pure virtual function. Which prototype would a programmer use in the class declaration for the class TwoDimensionalShape?

virtual void area() = 0;

void virtual area() = 0;

virtual void area()

void TwoDimensionalShape::area() = 0;