Question 1

In the ArraySortedBag class, why must the self argument be passed to the __init__ method of ArrayBag?

Accepted Answer

A)  to ensure the add method in ArraySortedBag is called if a source collection is specified 
B)  to ensure that ArraySortedBag calls the correct __init__ method 
C)  to ensure that ArrayBag calls its own __init__ method 
D)  to ensure the add method in ArrayBag is called if a source collection is specified 
A)  to ensure the add method in ArraySortedBag is called if a source collection is specified 
B)  to ensure that ArraySortedBag calls the correct __init__ method 
C)  to ensure that ArrayBag calls its own __init__ method 
D)  to ensure the add method in ArrayBag is called if a source collection is specified

Question 2

By using inheritance to create new classes, you increase code redundancy.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is true about the three bag classes (LinkedBag, ArrayBag, ArraySortedBag)?

Accepted Answer

A)  they are abstract classes 
B)  they implement the bag interface 
C)  the are all superclasses 
D)  LinkedBag is a subclass of ArraySortedBag 
A)  they are abstract classes 
B)  they implement the bag interface 
C)  the are all superclasses 
D)  LinkedBag is a subclass of ArraySortedBag

Question 4

A primary purpose of using inheritance is to eliminate redundant code.

Accepted Answer

A) True 
 B)False

Question 5

In the constructor for the ArrayBag class shown below, what is the missing code?
Def __init__(self, sourceCollection = None):

AbstractBag.__init__(self, sourceCollection)

Accepted Answer

A)  items.add(self) 
B)  self.items = Array(ArrayBag.DEFAULT_CAPACITY) 
C)  self.items = ArrayBag.add(sourceCollection) 
D)  add.items(self, sourceCollection) 
A)  items.add(self) 
B)  self.items = Array(ArrayBag.DEFAULT_CAPACITY) 
C)  self.items = ArrayBag.add(sourceCollection) 
D)  add.items(self, sourceCollection)

Question 6

What would be the purpose of creating a more general abstract class called AbstractCollection ?

Accepted Answer

A)  to group methods used by a single subclass 
B)  to hide the details of the methods used in your abstract classes 
C)  to create objects from a client application 
D)  to group methods that can be used for other types of collections 
A)  to group methods used by a single subclass 
B)  to hide the details of the methods used in your abstract classes 
C)  to create objects from a client application 
D)  to group methods that can be used for other types of collections

Question 7

The __init__ method in the parent class is automatically called by a subclass of the parent class.

Accepted Answer

A) True 
 B)False

Question 8

What is the syntax for the calling the __init__ method in the ArrayBag class from the ArraySortedBag class?

Accepted Answer

A)  self.init(ArrayBag, sourceCollection) 
B)  ArrayBag.self(__init__, sourceCollection) 
C)  ArrayBag.__init__(self, sourceCollection) 
D)  __init__.ArrayBag(self, sourceCollection) 
A)  self.init(ArrayBag, sourceCollection) 
B)  ArrayBag.self(__init__, sourceCollection) 
C)  ArrayBag.__init__(self, sourceCollection) 
D)  __init__.ArrayBag(self, sourceCollection)

Question 9

If a programmer calls the next function on an iterator object and there is no current item in the sequence, the next function returns the Null item.

Accepted Answer

A) True 
 B)False

Question 10

The root class of the Python hierarchy is called object .

Accepted Answer

A) True 
 B)False

Question 11

When looking at a hierarchy of abstract classes, the classes trend from the more specific to the more general going from the top to the bottom of the hierarchy.

Accepted Answer

A) True 
 B)False

Question 12

When calling the __init__ method from a subclass, you need to include the self argument.

Accepted Answer

A) True 
 B)False

Question 13

An abstract class is always used to create objects in client applications.

Accepted Answer

A) True 
 B)False

Question 14

A set of methods that could be used on other data structures besides the one they were created for could be used in a general abstract class.

Accepted Answer

A) True 
 B)False

Question 15

What is the root class of Python's built-in class hierarchy?

Accepted Answer

A)  self 
B)  list 
C)  dict 
D)  object 
A)  self 
B)  list 
C)  dict 
D)  object

Question 16

What is a class called when the purpose of it is to eliminate redundant methods in other classes?

Accepted Answer

A)  concrete class 
B)  abstract class 
C)  subclass 
D)  child class 
A)  concrete class 
B)  abstract class 
C)  subclass 
D)  child class

Question 17

Under which circumstance can an instance variable be moved to an abstract class?

Accepted Answer

A)  when it refers to the same type of data structure 
B)  when it is unique to a particular concrete class 
C)  when different data structure types are referenced by the variable 
D)  when it directly modifies the underlying data structure 
A)  when it refers to the same type of data structure 
B)  when it is unique to a particular concrete class 
C)  when different data structure types are referenced by the variable 
D)  when it directly modifies the underlying data structure

Question 18

When you use inheritance to customize a class, the existing and new class have identical behavior.

Accepted Answer

A) True 
 B)False

Question 19

An abstract class captures the common features and behavior of a set of related classes.

Accepted Answer

A) True 
 B)False

Question 20

When considering the ArrayBag class and the ArraySortedBag class, which of the following is true?

Accepted Answer

A)  the ArraySortedBag class is the parent of the ArrayBag class 
B)  the ArraySortedBag class is a subclass of ArrayBag 
C)  the ArrayBag class is a subclass of ArraySortedBag 
D)  the ArrayBag class is the child class of ArraySortedBag 
A)  the ArraySortedBag class is the parent of the ArrayBag class 
B)  the ArraySortedBag class is a subclass of ArrayBag 
C)  the ArrayBag class is a subclass of ArraySortedBag 
D)  the ArrayBag class is the child class of ArraySortedBag

In the ArraySortedBag class, why must the self argument be passed to the init method of ArrayBag?

By using inheritance to create new classes, you increase code redundancy.

Which of the following is true about the three bag classes (LinkedBag, ArrayBag, ArraySortedBag)?

A primary purpose of using inheritance is to eliminate redundant code.

In the constructor for the ArrayBag class shown below, what is the missing code? Def init(self, sourceCollection = None): < missing code > AbstractBag.init(self, sourceCollection)

What would be the purpose of creating a more general abstract class called AbstractCollection ?

The init method in the parent class is automatically called by a subclass of the parent class.

What is the syntax for the calling the init method in the ArrayBag class from the ArraySortedBag class?

If a programmer calls the next function on an iterator object and there is no current item in the sequence, the next function returns the Null item.

The root class of the Python hierarchy is called object .

When looking at a hierarchy of abstract classes, the classes trend from the more specific to the more general going from the top to the bottom of the hierarchy.

When calling the init method from a subclass, you need to include the self argument.

An abstract class is always used to create objects in client applications.

A set of methods that could be used on other data structures besides the one they were created for could be used in a general abstract class.

What is the root class of Python's built-in class hierarchy?

What is a class called when the purpose of it is to eliminate redundant methods in other classes?

Under which circumstance can an instance variable be moved to an abstract class?

When you use inheritance to customize a class, the existing and new class have identical behavior.

An abstract class captures the common features and behavior of a set of related classes.

When considering the ArrayBag class and the ArraySortedBag class, which of the following is true?

Basic Python Programming

An Overview of Collections

Searching, Sorting, and Complexity Analysis

Arrays and Linked Structures

Interfaces, Implementations, and Polymorphism

Stacks

Queues

Lists

Trees

Sets and Dictionaries

Graphs

Filters

Exam 6: Inheritance and Abstract Classes

In the ArraySortedBag class, why must the self argument be passed to the __init__ method of ArrayBag?

By using inheritance to create new classes, you increase code redundancy.

Which of the following is true about the three bag classes (LinkedBag, ArrayBag, ArraySortedBag)?

A primary purpose of using inheritance is to eliminate redundant code.

In the constructor for the ArrayBag class shown below, what is the missing code? Def __init__(self, sourceCollection = None): < missing code > AbstractBag.__init__(self, sourceCollection)

What would be the purpose of creating a more general abstract class called AbstractCollection ?

The __init__ method in the parent class is automatically called by a subclass of the parent class.

What is the syntax for the calling the __init__ method in the ArrayBag class from the ArraySortedBag class?

If a programmer calls the next function on an iterator object and there is no current item in the sequence, the next function returns the Null item.

The root class of the Python hierarchy is called object .

When looking at a hierarchy of abstract classes, the classes trend from the more specific to the more general going from the top to the bottom of the hierarchy.

When calling the __init__ method from a subclass, you need to include the self argument.

An abstract class is always used to create objects in client applications.

A set of methods that could be used on other data structures besides the one they were created for could be used in a general abstract class.

What is the root class of Python's built-in class hierarchy?

What is a class called when the purpose of it is to eliminate redundant methods in other classes?

Under which circumstance can an instance variable be moved to an abstract class?

When you use inheritance to customize a class, the existing and new class have identical behavior.

An abstract class captures the common features and behavior of a set of related classes.

When considering the ArrayBag class and the ArraySortedBag class, which of the following is true?

Basic Python Programming

An Overview of Collections

Searching, Sorting, and Complexity Analysis

Arrays and Linked Structures

Interfaces, Implementations, and Polymorphism

Stacks

Queues

Lists

Trees

Sets and Dictionaries

Graphs

Filters

In the ArraySortedBag class, why must the self argument be passed to the init method of ArrayBag?

In the constructor for the ArrayBag class shown below, what is the missing code? Def init(self, sourceCollection = None): < missing code > AbstractBag.init(self, sourceCollection)

The init method in the parent class is automatically called by a subclass of the parent class.

What is the syntax for the calling the init method in the ArrayBag class from the ArraySortedBag class?

When calling the init method from a subclass, you need to include the self argument.