4102 Chapter 5
45 In C++, instance variables and methods are both called descriptors. Select one: True False
The correct answer is 'False'.
46 Abstract classes are often instantiated by the application program. Select one: True False
The correct answer is 'False'.
50 In C++, objects can only be allocated on the heap. Select one: True False
The correct answer is 'False'.
In Java, scalar data types are objects for reasons of efficiency. Select one: True False
The correct answer is 'False'.
Smalltalk uses value semantics, such that variables refer to an object's value. Select one: True False
The correct answer is 'False'.
When a constructor calls another constructor, it is called constructor teaming. Select one: True False
The correct answer is 'False'.
When multiple inheritance is declared using the virtual keyword, separate copies of each class on an inheritance path are created. Select one: True False
The correct answer is 'False'.
In Smalltalk, a message is a request for a service. Select one: True False
The correct answer is 'True'.
26 The unique structure of each application is referred to as an application framework. Select one: True False
The correct answer is 'False'.
30 Messages in Smalltalk that expect arguments are called parameterized messages. Select one: True False
The correct answer is 'False'.
36 C++ has built-in garbage collection. Select one: True False
The correct answer is 'False'.
Java and Smalltalk both allocate objects directly onto the stack for efficiency. Select one: True False
The correct answer is 'False'.
Referencing is the ability of a class to use the behavior and/or properties of classes above it in its hierarchy. Select one: True False
The correct answer is 'False'.
All built-in classes in Smalltalk are subclasses of the Object class. Select one: True False
The correct answer is 'True'.
C++ member functions that are given implementations in a class declaration are automatically assumed to be inline. Select one: True False
The correct answer is 'True'.
In C++, template classes can be used to define generic collections. Select one: True False
The correct answer is 'True'.
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. Select one: True False
The correct answer is 'True'.
The history of object-oriented programming languages begins in the 1960s with the Simula project. Select one: True False
The correct answer is 'True'.
29 ____ binding is the binding of messages to methods based on the class of the receiver object. Select one: a. Automatic b. Adaptive c. Static d. Dynamic
The correct answer is: Dynamic
____ is an important need satisfied by object-oriented programming. Select one: a. Abstract data typing b. Rapid prototyping c. Program component dependence d. Independence of software components
The correct answer is: Independence of software components
____ can belong to more than one class. Select one: a. Multimethods b. Supermethods c. Global methods d. Variable methods
The correct answer is: Multimethods
47 ____ is the use of the same names for messages requesting similar services from different classes. Select one: a. Overshadowing b. Polymorphism c. Generalization d. Distinction
The correct answer is: Polymorphism
48 The first programming language to incorporate the object paradigm in a thorough and consistent way was ____. Select one: a. Simula67 b. Fortran-80 c. Algol60 d. Smalltalk-80
The correct answer is: Smalltalk-80
The Smalltalk block object is enclosed in ____. Select one: a. [ ] b. c. < > d. { }
The correct answer is: [ ]
25 Java uses ____ to implement method lookup. Select one: a. a jump table b. polymorphism c. an inheritance tree d. restricted access
The correct answer is: a jump table
An object in Smalltalk that contains code is called a ____. Select one: a. snippet b. routine c. module d. block
The correct answer is: block
A ____ message is sent to a class in Smalltalk. Select one: a. constructor b. control c. object d. class
The correct answer is: class
35 Applications normally create and manipulate instances of ____ classes in Smalltalk. Select one: a. abstract b. physical c. concrete d. final
The correct answer is: concrete
23 In Java, the ____ constructor takes no parameters. Select one: a. overloaded b. default c. chained d. base
The correct answer is: default
39 C++ includes ____, which specify how to deallocate memory for objects. Select one: a. garbage collectors b. deallocators c. erasers d. destructors
The correct answer is: destructors
42 Restricting access to internal details of software components is known as ____. Select one: a. polymorphism b. abstraction c. encapsulation d. redefinition
The correct answer is: encapsulation
Java uses ____ to deallocate objects that are no longer needed. Select one: a. memory functions b. destructors c. garbage collection d. scope resolution
The correct answer is: garbage collection
A function is considered to be ____ if a compiler may replace the function call by the actual code for the function. Select one: a. redirectable b. inline c. substitutable d. virtual
The correct answer is: inline
41 In Smalltalk, an object's ____ is the set of messages it recognizes. Select one: a. listener set b. interface c. operator list d. command list
The correct answer is: interface
In Smalltalk, the object that receives a message performs its service by invoking an appropriate ____. Select one: a. sub-routine b. function c. method d. procedure
The correct answer is: method
51 In Smalltalk, messages that result in the change of state in the receiver are called ____. Select one: a. modifiers b. adjustors c. mutators d. relays
The correct answer is: mutators
In Java, scalar data types are also called ____ types. Select one: a. quantitative b. simple c. primitive d. flexible
The correct answer is: primitive
49 In C++, ____ members are accessible by derived classes. Select one: a. protected b. extensible c. private d. restricted
The correct answer is: protected
When a language's variables refer to objects, we say that the language uses ____ semantics. Select one: a. value b. abstract c. reference d. object
The correct answer is: reference
Member functions can be implemented outside the declaration of a class in C++ using the ____ operator. Select one: a. redirection b. scope resolution c. scope altering d. directive
The correct answer is: scope resolution
28 In C++, a pure virtual declaration is a function declared with the keyword virtual and ____. Select one: a. parentheses b. the keyword null c. the keyword void d. a pointer
The correct answer is: the keyword void
40 In Smalltalk, ____ messages expect no arguments. Select one: a. inquisitive b. redirecting c. unary d. single
The correct answer is: unary
27 C++ permits an object to be allocated either directly on the stack or as a pointer. Select one: True False
The correct answer is 'True'.
31 Multiple inheritance in C++ ordinarily creates separate copies of each class on an inheritance path. Select one: True False
The correct answer is 'True'.
32 Extending an object is one way that a software component can be modified for reuse. Select one: True False
The correct answer is 'True'.
37 Smalltalk provides a small set of binary messages that allow the programmer to write arithmetic and comparison expressions. Select one: True False
The correct answer is 'True'.
38 Abstraction is the collection of similar operations from two different components into a new component. Select one: True False
The correct answer is 'True'.
43 Smalltalk and Java require the use of a garbage collector to return inaccessible storage to the heap. Select one: True False
The correct answer is 'True'.
44 Public members are those accessible to client code as well as to derived classes. Select one: True False
The correct answer is 'True'.
24 To avoid repeated inheritance, one must ____. Select one: a. declare the inheritance using the virtual keyword b. use a private inner class c. use an inherited function d. declare the inheritance using the shared keyword
declare the inheritance using the virtual keyword
