Bitrate = 80 kbps

Mono

Quality = Very high (q = 0)

C8L3Q1: How do you debug a service?

Answer: Install it, start it and then attach a debugger to the service's process.

C8L3Q2: When creating a service, which methods should you override and which are optional?

Follow up question: What should you also do if you override any optional method?

Answer: The methods OnStart and OnStop should be overridden. The methods OnPause, OnContinue and OnShutdown are optional.

Follow up answer: If OnPause and/or OnContinue are overriden, set ServiceBase.CanPauseAndContinue to true. If OnShutdown is overriden set ServiceBase.CanShutdown to true.

C8L3Q3: What four things does the ServiceInstaller class define?

Answer: The service description, display name, service name and start type.

C8L3Q4: What does the ServiceProcessInstaller class define?

Answer: The service account settings.

C8L3Q5: What are the three start types for a service and which is the default?

Answer: Automatic, manual (default) and disabled.

C8L3Q6: What are the four types of accounts that can be used a security context for a Windows service?

Follow up question: Which is the default, which is the most secure and which is the most privileged?

Answer:

• Local service (most secure)
• Network service
• Local system (most privileged)
• User (default)

C8L3Q7: What tool is used to manually install a service?

Answer: InstallUtil.exe.

C9L1Q1: What are two most important classes used to deal with application settings and what namespace are they in?

Answer: Configuration and ConfigurationManager, which are in the System.Configuration namespace.

C9L1Q2: What are the four ConfigurationManager methods that open various configurations?

Answer:

• OpenExeConfiguration
• OpenMachineConfiguration
• OpenMappedExeConfiguration
• OpenMappedMachineConfiguration

C9L1Q3: What should you always do before opening a mapped configuration file and why?

Answer: Check for the existence of the file, because if it is missing no error will be generated - instead all the configuration settings will be null.

C9L1Q4: How can you specify which version of the .NET Framework an application should be run with?

Answer: Add a supportedRuntime entry in the startup section of the configuration file.

C9L1Q5: Which is obsolete, ConfigurationSettings or ConfigurationManager?

Answer: ConfigurationSettings

C9L1Q6: What are the two default properties of the ConfigurationManager class used to store configuration information?

Answer: AppSettings and ConnectionString.

PragC2Q1: When does software maintenance begin and why?

Answer: Software maintenance begins as soon as coding starts, because things keep changing (requirements and our understanding of them, environments, knowledge etc.)

PragC2Q2: What is the DRY principle?

Answer: Don't Repeat Yourself.

“Every piece of knowledge must be a single unambiguous, authoritative representation with in a system.”

PragC2Q3: What are the four categories of duplication?

Hint: The four i's of duplication.

Answer:

• Imposed - Developers feel they have no choice - the environment appears to require duplication.
• Inadvertent - Developers don't realise they are duplicating information.
• Impatient - Developers get lazy and duplicate because it seems easier.
• Interdeveloper - Multiple people on a team (or different teams) duplicate information.