Questions for the 98-361 were updated on : Nov 29 ,2024
You are creating an application for computers that run Windows XP or later. This application must run after the computer
starts. The user must not be aware that the application is running.
The application performs tasks that require permissions that the logged-in user does not have.
Which type of application allows this behavior?
A
An application presents the user with a graphical interface. The interface includes buttons that the user clicks to perform
tasks. Each time the user clicks a button, a method is called that corresponds to that button.
Which term is used to describe this programming model?
D
How does a console-based application differ from a Windows Forms application?
D
Which type of Windows application presents a parent window that contains child windows?
C
Explanation:
A multiple document interface (MDI) is a graphical user interface in which multiple windows reside under a single parent
window. Such systems often allow child windows to embed other windows inside them as well, creating complex nested
hierarchies. This contrasts with single document interfaces (SDI) where all windows are independent of each other.
The purpose of a constructor in a class is to:
A
Explanation:
Each value type has an implicit default constructor that initializes the default value of that type.
A class named Manager is derived from a parent class named Employee. The Manager class includes characteristics that
are unique to managers.
Which term is used to describe this object-oriented concept?
C
Explanation:
Classes (but not structs) support the concept of inheritance. A class that derives from another class (the base class)
automatically contains all the public, protected, and internal members of the base class except its constructors and
destructors.
Incorrect: not A: Encapsulation is sometimes referred to as the first pillar or principle of object-oriented programming.
According to the principle of encapsulation, a class or struct can specify how accessible each of its members is to code
outside of the class or struct. Methods and variables that are not intended to be used from outside of the class or assembly
can be hidden to limit the potential for coding errors or malicious exploits.
Which term is used to describe a class that inherits functionality from an existing class?
C
Explanation:
Classes (but not structs) support the concept of inheritance. A class that derives from another class (the base class)
automatically contains all the public, protected, and internal members of the base class except its constructors and
destructors.
Two classes named Circle and Square inherit from the Shape class. Circle and Square both inherit Area from the Shape
class, but each computes Area differently.
Which term is used to describe this object-oriented concept?
A
Explanation:
You can use polymorphism to in two basic steps:
Create a class hierarchy in which each specific shape class derives from a common base class. Use a virtual method to
invoke the appropriate method on any derived class through a single call to the base class method.
You create an object of type ANumber. The class is defined as follows.
What is the value of _number after the code is executed?
C
You need to allow a consumer of a class to modify a private data member.
What should you do?
C
Explanation:
In this example (see below), the Employee class contains two private data members, name and salary. As private members,
they cannot be accessed except by member methods. Public methods named GetName and Salary are added to allow
controlled access to the private members. The name member is accessed by way of a public method, and the salary
member is accessed by way of a public read-only property.
Note: The private keyword is a member access modifier. Private access is the least permissive access level. Private
members are accessible only within the body of the class or the struct in which they are declared
Example:
class Employee2
{
private string name = "FirstName, LastName"; private double salary = 100.0;
public string GetName()
{
return name;
}
public double Salary
{
get { return salary; }
}
}
You are designing a class for an application. You need to restrict the availability of the member variable accessCount to the
base class and to any classes that are derived from the base class.
Which access modifier should you use?
C
You are creating an application that presents users with a graphical interface in which they can enter data. The application
must run on computers that do not have network connectivity.
Which type of application should you choose?
B
Explanation:
Use Windows Forms when a GUI is needed.
You are creating an application that presents users with a graphical interface. Users will run this application from remote
computers. Some of the remote computers do not have the . NET Framework installed. Users do not have permissions to
install software.
Which type of application should you choose?
C
The elements of an array must be accessed by:
C
Simulating the final design of an application in order to ensure that the development is progressing as expected is referred to
as:
C