Deck 5: Object-Oriented Programming

Question 1

In Smalltalk,a message is a request for a service.

Answer 1

True

Question 2

Extending an object is one way that a software component can be modified for reuse.

Answer 2

True

Question 3

Multiple inheritance in C++ ordinarily creates separate copies of each class on an inheritance path.

Answer 3

True

Question 4

The history of object-oriented programming languages begins in the 1960s with the Simula project.

Question 5

C++ member functions that are given implementations in a class declaration are automatically assumed to be inline.

Question 6

C++ has built-in garbage collection.

Question 7

Referencing is the ability of a class to use the behavior and/or properties of classes above it in its hierarchy.

Question 8

Smalltalk provides a small set of binary messages that allow the programmer to write arithmetic and comparison expressions.

Question 9

In C++,template classes can be used to define generic collections.

Question 10

Smalltalk uses value semantics,such that variables refer to an object's value.

Question 11

All built-in classes in Smalltalk are subclasses of the Object class.

Question 12

Abstraction is the collection of similar operations from two different components into a new component.

Question 13

In Java,scalar data types are objects for reasons of efficiency.

Question 14

The unique structure of each application is referred to as an application framework.

Question 15

Public members are those accessible to client code as well as to derived classes.

Question 16

Object-oriented programs consist of a set of objects that execute by acting and reacting to each other,much the same way that a real-world process proceeds.

Question 17

Messages in Smalltalk that expect arguments are called parameterized messages.

Question 18

In C++,instance variables and methods are both called descriptors.

Question 19

Abstract classes are often instantiated by the application program.

Question 20

When a constructor calls another constructor,it is called constructor teaming.

Question 21

In Smalltalk,____ messages expect no arguments.

A) single
B) unary
C) inquisitive
D) redirecting

Question 22

C++ permits an object to be allocated either directly on the stack or as a pointer.

Question 23

____ is the use of the same names for messages requesting similar services from different classes.

A) Polymorphism
B) Overshadowing
C) Distinction
D) Generalization

Question 24

Restricting access to internal details of software components is known as ____.

A) abstraction
B) encapsulation
C) polymorphism
D) redefinition

Question 25

An object in Smalltalk that contains code is called a ____.

A) block
B) snippet
C) routine
D) module

Question 26

When a language's variables refer to objects,we say that the language uses ____ semantics.

A) value
B) object
C) reference
D) abstract

Question 27

In Smalltalk,the object that receives a message performs its service by invoking an appropriate ____.

A) method
B) function
C) procedure
D) sub-routine

Question 28

In Smalltalk,messages that result in the change of state in the receiver are called ____.

A) modifiers
B) relays
C) mutators
D) adjustors

Question 29

In C++,objects can only be allocated on the heap.

Question 30

In Smalltalk,an object's ____ is the set of messages it recognizes.

A) command list
B) interface
C) operator list
D) listener set

Question 31

Smalltalk and Java require the use of a garbage collector to return inaccessible storage to the heap.

Question 32

In Java,scalar data types are also called ____ types.

A) primitive
B) simple
C) quantitative
D) flexible

Question 33

____ is an important need satisfied by object-oriented programming.

A) Rapid prototyping
B) Program component dependence
C) Abstract data typing
D) Independence of software components

Question 34

Applications normally create and manipulate instances of ____ classes in Smalltalk.

A) abstract
B) concrete
C) final
D) physical

Question 35

The first programming language to incorporate the object paradigm in a thorough and consistent way was ____.

A) Simula67
B) Smalltalk-80
C) Fortran-80
D) Algol60

Question 36

When multiple inheritance is declared using the virtual keyword,separate copies of each class on an inheritance path are created.

Question 37

The Smalltalk block object is enclosed in ____.

A) [ ]
B) { }
C) ( )
D) < >

Question 38

A(n)____ message is sent to a class in Smalltalk.

A) object
B) class
C) control
D) constructor

Question 39

Java and Smalltalk both allocate objects directly onto the stack for efficiency.

Question 40

____ binding is the binding of messages to methods based on the class of the receiver object.

A) Automatic
B) Static
C) Adaptive
D) Dynamic

Question 41

C++ includes ____,which specify how to deallocate memory for objects.

A) deallocators
B) garbage collectors
C) destructors
D) erasers

Question 42

____ can belong to more than one class.

A) Supermethods
B) Multimethods
C) Global methods
D) Variable methods

Question 43

A function is considered to be ____ if a compiler may replace the function call by the actual code for the function.

A) inline
B) substitutable
C) redirectable
D) virtual

Question 44

Member functions can be implemented outside the declaration of a class in C++ using the ____ operator.

A) scope altering
B) redirection
C) directive
D) scope resolution

Question 45

In C++,a pure virtual declaration is a function declared with the keyword virtual and ____.

A) the keyword null
B) a pointer
C) parentheses
D) the keyword void

Question 46

Java uses ____ to deallocate objects that are no longer needed.

A) garbage collection
B) destructors
C) scope resolution
D) memory functions

Question 47

To avoid repeated inheritance,one must ____.

A) declare the inheritance using the virtual keyword
B) declare the inheritance using the shared keyword
C) use a private inner class
D) use an inherited function

Question 48

In C++,____ members are accessible by derived classes.

A) private
B) restricted
C) protected
D) extensible

Question 49

In Java,the ____ constructor takes no parameters.

A) chained
B) overloaded
C) default
D) base

Question 50

Java uses ____ to implement method lookup.

A) a jump table
B) an inheritance tree
C) restricted access
D) polymorphism