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C10L4Q8: What industry standard does the WMI use to represent systems, processes, networks, devices and enterprise components?

Answer: Common Information Model

C10L4Q9: The WMI architecture consists of what three tiers?

Answer:

• Client software components.
• The object manager.
• Provider software components.

C10L4Q10: What three things can applications use the WMI for?

Answer:

• Enumerating or retrieving a collection of instance property data.
• Querying for selected instance data.
• Subscribing to events.

C10L4Q11: What can the WMI instrumentation be used for?

Answer: Applications can create their own class and instances with properties and methods that store data about themselves to WMI.

C10L4Q12: What class or classes are used when gathering WMI class information?

Answer: ManagementObject and ManagementClass.

C10L4Q13: What class or classes are used when querying for data with WMI?

Answer: SelectQuery, ManagementObjectSearcher, WqlObjectQuery and ObjectQuery.

C10L4Q14: What class or classes are used when querying for data asynchronously with WMI?

Answer: ManagementObjectCollection and ManagementOperationObserver.

C10L4Q15: What class or classes are used when executing methods with WMI?

Answer: ManagementBaseObject.

C10L4Q16: What class or classes are used when executing methods asynchronously with WMI?

Answer: ManagementOperationObserver.

C10L4Q17: What class or classes are used when receiving events from WMI?

Answer: WqlEventQuery and ManagementEventWatcher.

C10L4Q18: What class or classes are used when receiving events asynchronously from WMI?

Answer: EventArrivedEventArgs, EventArrivedEventHandler, CompletedEventArgs and CompletedEventHandler.

C10L4Q19: What class or classes are used when connecting to a remote computer with WMI?

Answer: ConnectionOptions and ManagementScope.

C10L4Q20: What class or classes are used when creating data providers with WMI instrumentation?

Answer: Instance, InstrumentationClassAttribute and InstrumentedAttribute.

C10L4Q21: What class or classes are used when creating event providers with WMI instrumentation?

Answer: BaseEvent and Instrumentation.

C10L4Q22: What class or classes are used when registering a providers with WMI instrumentation?

Answer: ManagementInstaller.

Answer: ManagementInstaller.

C10L4Q23: What does the ObjectQuery class do?

Answer: It represents a management query that returns instances or classes.

C10L4Q24: What does the ManagementObjectSearcher class do?

Answer: It retrieved a collection of management objects based on a specifies query.

C10L4Q25: What does the ManagementObjectCollection class do?

Answer: It represents different collections of management objects retrieved through WMI.

C10L4Q26: Objects contained in a ManagementObjectCollection are derived from what type?

Answer: ManagementBaseObject.

C8L3Q8: What are three methods for starting a Windows service?

Answer:

• Server Explorer.
• Services Control Manager.
• Programmatically using the ServiceController class.

C8L3Q9: What exception will a ServiceController object throw if the service name does not exist on the machine?

Answer: InvalidOperationException.

C8L3Q10: What class is used to interact with Window services?

Answer: ServiceController.

C10L1Q3: What should never be done with any event log object?

Answer: It should never be passed to less trusted code.

C10L1Q4: What is required to create an event source and why?

Answer: Administrative privileges is required because all logs, including security, must be searched to determine whether the event source is unique.

C10L1Q5: Which versions of Windows do not support event logs?

Answer: Windows 98 and Windows Me.

Art1P23Q1: What is a package that has three other packages depending on it said to be?

Answer: Responsible to those three other packages.

Art1P23Q2: What is a package that depends on nothing said to be?

Answer: An independent package.

Art1P23Q3: What is a package that has no other packages depending on it said to be?

Answer: An irresponsible package.

Art1P23Q4: What is a package that has three other packages depending on it said to be?

Answer: A dependant package.

Art1P23Q5: What is a package that is independent and responsible to other packages said to be?

Answer: A stable package.

Art1P23Q6: What is an irresponsible, dependant package said to be?

Answer: An instable package.

Art1P24Q2: What is afferent coupling?

Answer: The number of classes outside the package that depend on classes inside the package.

Art1P24Q3: What is efferent coupling?

Answer: The number of classes outside the package that classes inside the package depend on.

Art1P24Q4: What is the formula for determining the instability of a package?

Answer: Instability equals efferent coupling divided by afferent coupling plus efferent coupling.

Art1P26Q1: What is the formula for determining the abstractness of a package?

Answer: Abstractness equals the number of abstract classes in the package divided by the total number of classes.

Art1P26Q2: What type of packages occupy the zone of uselessness?

Answer: Instable, abstract packages.

Art1P26Q3: What type of packages occupy the zone of pain?

Answer: Stable, concrete packages.

Art1P26Q4: What is the formula for determining the distance a package is from the main sequence?

Answer: The absolute value of the abstractness plus instability minus one.

PragC5Q1: What is the Law of Demeter?

Answer: Any method of an object should call only methods belonging to:

• itself,
• any parameters that were passed into the method,
• any object it created, or
• any directly held component objects.

PragC5Q2: What is the response set of a class?

Answer: The number of functions directly invoked by methods of the class.

Art1P21Q2: What design pattern should be used when a client type class directly depends on a server type class?

Answer: An Abstract Server.

Art1P21Q3: What is the Abstract Server design pattern and what is its advantage?

Answer: An Abstract Server is an abstract interface between a client and a server. Its advantage is that the abstract interface becomes a “hinge point” that design can flex around.

Art1P29Q1: What design patter should be used when inserting an abstract interface is not feasible?

Answer: Adapter.

Art1P29Q2: What is the Adapter design pattern?

Answer: The Adapter is an object that implements the abstract interface to delegate to the server. Every method of the adapter simply translates and then delegates.