Object-orientated programming

Question 1

____ is a template that defines structure of objects.

Class
Object
Instance
Method

Answer 1

Class

Question 2

___ is a container of related information and a set of operations to manipulate that info.

Class
Object
Insantiation
Interface

Answer 2

Object

Question 3

___ is a unique object created from a class.

Attribute
Instance
Instance Variable
Instantiation

Answer 3

Instance

Question 4

___ is the process of creating an object from a class definition.

Attribute
Instance
Instance Variable
Instantiation

Answer 4

Instantiation

Question 5

____ is a variable that holds data about the state of an object.

Attribute
Instance
Instance Variable
Instantiation

Answer 5

Attribute

Question 6

____ is another name for attribute.

Attribute
Instance
Instance Variable
Instantiation

Answer 6

Instance variable

Question 7

____ is a function that works with object’s internal data and provides services to external code.

Class
Interface
Accessor
Method

Answer 7

Method

Question 8

___ is a description of actions an object can do, or services it can provide to clients.

Class
Interface
Accessor
Method

Answer 8

Interface

Question 9

____ is a method that returns a private instance variable.

Class
Interface
Accessor
Method

Answer 9

Accessor

Question 10

___ is a method that allows controlled modifications to private instance variable.

Instance
Interface
Mutator
Accessor

Answer 10

Mutator

Question 11

____ is wrapping the data and code acting on that data, together as a single unit.

Class
Object
Instance
Encapsulation

Answer 11

Encapsulation

Question 12

Object-orientated programming allows us to hide the object’s data attributes from code that is outside the object.

TRUE
FALSE

Answer 12

TRUE

Question 13

Procedures operate on data items that separate from the procedures.

TRUE
FALSE

Answer 13

TRUE

Question 14

An object is a stand-alone program but is used by programs that need its service.

TRUE
FALSE

Answer 14

FALSE

Question 15

All instances of a class share the same values of the data attributes in the class.

TRUE
FALSE

Answer 15

FALSE

Question 16

The self parameter need not be named self but it is strongly recommended to do so, to conform with standard practice.

TRUE
FALSE

Answer 16

TRUE

Question 17

Which section in the UML class diagram holds the list of the class’s data attributes?

first section
second section
third section
fourth section

Answer 17

second section

Question 18

What type of method provides a safe way for code outside a class to retrieve the values of attributes, without exposing the attributes in a way that could allow them to be changed by code outside the method?

class
setter
mutator
accessor

Answer 18

accessor

Question 19

Which attributes belong to a specific instance of a class?

data
object
self
instance

Answer 19

instance

Question 20

Which method is automatically executed when an instance of a class in created in memory?

__obj__
__state__
__str__
__init__

Answer 20

__init__

Question 21

Combining data and code in a single object is known as

objectification
modularity
encapsulation
instantiation

Answer 21

encapsulation

Question 22

Mutator methods are also known as

getters
instances
attributes
setters

Answer 22

setters

Question 23

What an object is passed as an argument. ___ is passed into the parameter variable.

a reference to the object’s state
a reference to the object
Objects cannot be passed as arguments
a copy of the object

Answer 23

a reference to the object

Question 24

In object-orientated programming, one of the first tasks of the programmer is to

list the nouns in the problem
list the methods that are needed
identify the objects needed
identify the classes needed

Answer 24

identify the classes needed

Question 25

Which is the first line needed when creating a class named Worker?

import random
class Worker:
def worker_pay(self):
def\_\_init\_\_(self)

Answer 25

class Worker:

Question 26

Which of the following will create an object, worker_joey, of the Worker class?

class worker_joey:
worker_joey = Worker()
def\_\_init\_\_(worker_joey):
worker_joey:Worker

Answer 26

worker_joey = Worker()