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Table of Contents
Study Questions - Audio Creation
CDEx Settings
Bitrate = 80 kbps
Mono
Quality = Very high (q = 0)
Questions To Be Recorded
Lesson 4: Detecting Management Events
C10L4Q1: What are the four most important members of the System.Management namespace?
Answer: ManagementQuery, EventQuery, ObjectQuery and ManagementObjectQuery.
C10L4Q2: What does WMI stand for?
Answer: Windows Management Instrumentation.
C10L4Q3: What are the two steps to retrieve information from the WMI?
Answer:
- Create a ManagementObjectSearcher object and pass the query into the constructor.
- Obtain a ManagementObjectCollection object by calling the ManagementObjectSearcher's Get method.
C10L4Q4: What needs to be selected from to enumerate the logical drives?
Answer: Win32_LogicalDisk
C10L4Q5: What needs to be selected from to enumerate the network adapters?
Answer: Win32_NetworkAdapterConfiguration
C10L4Q6: What needs to be selected from to enumerate the Windows Services?
Answer: Win32_Service
C10L4Q7: What class would be used to respond a change in the WMI?
Answer: ManagementEventWatcher
Pragmatic Programming
PragC2Q5: What is Meyer's Uniform Access principle?
Answer:
“All services offered by a module should be available through a uniform notation, which does not betray whether they are implemented through storage or through computation.”
or
“Class properties are good.”
PragC2Q6: What are two techniques for avoiding or reducing inadvertent duplication?
Answer: Normalise the data and don't store what can be calculated.
PragC2Q7: What should be done if the DRY principle needs to be violated for performance reasons?
Answer: Ensure the violation is not exposed to the outside world by keeping it contained with in the class.
PragC2Q8: How do you avoid impatient duplication?
Answer: Discipline.
PragC2Q9: What adage relates to impatient duplication?
Answer:
“Short cuts make for long delays.”