Exam 70-483 topic 1 question 30 discussion

Actual exam question from Microsoft's 70-483

Question #: 30
Topic #: 1

You are developing a method named CreateCounters that will create performance counters for an application.
The method includes the following code. (Line numbers are included for reference only.)

You need to ensure that Counter1 is available for use in Windows Performance Monitor (PerfMon).
Which code segment should you insert at line 16?

A. CounterType = PerformanccCounterType.RawBase
B. CounterType = PerformanceCounterType.AverageBase
C. CounterType = PerformanceCounterType.SampleBase
D. CounterType = PerformanceCounterType.CounterMultiBase

Show Suggested Answer

Suggested Answer: C 🗳️
PerformanceCounterType.SampleBase - A base counter that stores the number of sampling interrupts taken and is used as a denominator in the sampling fraction. The sampling fraction is the number of samples that were 1 (or true) for a sample interrupt. Check that this value is greater than zero before using it as the denominator in a calculation of SampleFraction.
PerformanceCounterType.SampleFraction - A percentage counter that shows the average ratio of hits to all operations during the last two sample intervals.
Formula: ((N 1 - N 0) / (D 1 - D 0)) x 100, where the numerator represents the number of successful operations during the last sample interval, and the denominator represents the change in the number of all operations (of the type measured) completed during the sample interval, using counters of type
SampleBase. Counters of this type include Cache\Pin Read Hits %.
References: http://msdn.microsoft.com/en-us/library/system.diagnostics.performancecountertype.aspx

by tanujgyan at April 11, 2020, 8:25 p.m.

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tanujgyan

Highly Voted 5 years, 2 months ago

The correct answer is C. The logic is that when you add a counter than you have to add a matching base counter for that. You can refer to sample program similar to this question and table here https://docs.microsoft.com/en-us/dotnet/api/system.diagnostics.performancecountertype?view=netframework-4.8

upvoted 6 times

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thiemamd

Most Recent 4 years, 10 months ago

I don't understand this choice. Can someone explain more please?

upvoted 2 times

Kilsimon

4 years, 8 months ago

SampleBase: "A base counter that stores the number of sampling interrupts taken and is used as a denominator in the sampling fraction. The sampling fraction is the number of samples that were 1 (or true) for a sample interrupt. Check that this value is greater than zero before using it as the denominator in a calculation of SampleFraction." - https://docs.microsoft.com/en-us/dotnet/api/system.diagnostics.performancecountertype?view=netframework-4.8

upvoted 2 times

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