Tracing in .NET CASENET Practice Questions (Page 8)

Questions 36–40

1. 36expert · hard

   A .NET application has multiple TraceSources, each with its own TraceSwitch. The team wants to implement a global 'maintenance mode' that, when enabled, forces all sources to log at least Information level, regardless of their individual switch settings. They also want to be able to disable this global override at runtime. What is the most maintainable approach?

   • AUse a BooleanSwitch to enable a global 'verbose' mode that overrides all other switches.
   • BUse a custom TraceFilter that checks a global flag and allows all messages when maintenance mode is enabled.
   • CSet each TraceSwitch's Level to Information in code when maintenance mode is enabled.
   • DChange the application configuration file to set all switches to Information and restart the application.
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2. 37application · medium

   A .NET Core application uses DiagnosticSource to emit events for HTTP requests. The operations team wants to correlate these events with the request's Activity ID, but they notice that the Activity ID is not being set for some events. What is the likely cause?

   • AThe DiagnosticSource is not enabled in the application's configuration file.
   • BThe events are being emitted outside of an Activity scope, so there is no current Activity to associate with.
   • CThe Activity ID is only available when using Application Insights, not with DiagnosticSource.
   • DThe DiagnosticSource is using the wrong listener, so the Activity ID is not propagated.
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4. 38foundation · easy

   What is the purpose of the Activity class in .NET Core tracing?

   • ATo configure the verbosity of tracing.
   • BTo filter trace messages based on severity.
   • CTo represent a unit of work or operation that can be used for correlation and distributed tracing.
   • DTo write trace messages to a file.
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5. 39foundation · easy

   In .NET Core, which class is used to write diagnostic events for tracing?

   • AEventLog
   • BDebug
   • CDiagnosticSource
   • DTraceSource
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6. 40foundation · easy

   In classic ASP.NET, how do you enable page-level tracing?

   • ABy setting the Trace attribute to 'true' in the @Page directive.
   • BBy calling the Trace.Enable method in the Page_Load event.
   • CBy setting the TraceMode attribute in the <pages> element.
   • DBy adding a <trace> element to the web.config file.
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