C# Chapter 11

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public static void ExchangeContents (ref T value1, ref T value2) { T temp; temp = value1; value1 = value2; value2 = temp; } ​ ​Which of the following is TRUE regarding the above segment of code?

All of the options are correct.

The reserved word base, placed in the constructor heading before the opening curly brace, is used to indicate the base class constructor should be called.

True

When you override a method, the signatures of the methods must match.

True

It is not necessary to add a reference to a .dll file if the file is stored in the same project subdirectory.

False

Multiple classes can implement the same interface, but a class can implement only one interface.

False

Software components often take the form of classes or collections of methods.

False

Through defining the methods of a class as private, you protect the class.

False

Today applications are normally designed to be single, self-contained, monolithic programs.

False

You cannot spread the definition of your classes over multiple files using the partial keyword. Partial classes are reserved for use by the IDE.

False

You have experienced the use of polymorphism in programs through the use of the Main( ) method.

False

In addition to creating the console and Windows applications you've already created, you can create class library files with a dynamic link library (.EXE) extension that can be reused.

False

All .NET languages support multiple inheritance.

False

For classes of animal and dog, animal would be considered the derived class.

False

Abstraction provides a way to simplify complex problems by generalizing and then representing only essential features appropriate to the problem.

True

Class library components should be compiled using a Build option instead of Running the application.

True

Object-oriented development focuses on designing classes that can be reused. One way to ensure this reuse is through designing and building components that can be stored in a library and called on when needed.

True

Once a DLL is available, any application can add a reference to the DLL. The referenced file with the .dll extension becomes part of the application's private assembly.

True

Partial classes enable a class to be split into two or more files and combined when the application is compiled and ran.

True

The Unified Modeling Language (UML) notation for the interfaces specifies that the name of the Interface methods should appear in italics.

True

Use the ____ keyword to mark a class so that it can be used only as the base class from which other classes can be derived.

abstract

The base default constructor is called by ____.

adding base( ): between the constructor heading and the opening curly brace

Variables declared as dynamic ____.

can hold any type of value

Classes can have a "has a" relationship. This is a concept called ____ or aggregation.

containment

Determining which method to call at runtime based on which object invokes the method describes ____.

dynamic binding

By defining data members as private, you protect the data and enable access only through the object's methods and properties. This describes the ____ feature.

encapsulation

Packaging data attributes and behaviors into a single unit so that implementation details can be hidden describes ____ as it relates to object oriented development.

encapsulation

​Prior to the introduction of generics, one way to write reusable code was to use the ____ data type for instance data members.

object

If you do not want subclasses to be able to provide new implementation details, you can add the keyword ____ to methods. Doing so keeps derived classes from being able to override the method.

sealed

When you add the virtual keyword to a method heading, it ____.

tags the method as capable of being overridden.

Which keyword instructs the compiler to infer the type of the variable from the expression on the right side of the initialization statement?

var


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