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Testinside 70-536 VB exam answers

1. You are developing an application that stores data about your company's sales and technical support teams.
You need to ensure that the name and contact information for each person is available as a single collection when a user queries details about a specific team. You also need to ensure that the data collection guarantees type safety.
Which code segment should you use?
A. Dim team As Hashtable = New Hashtable()
team.Add(1, "Hance")
team.Add(2, "Jim")
team.Add(3, "Hanif")
team.Add(4, "Kerim")
team.Add(5, "Alex")
team.Add(6, "Mark")
team.Add(7, "Roger")
team.Add(8, "Tommy")
B. Dim team As ArrayList = New ArrayList()
team.Add("1, Hance")
team.Add("2, Jim")
team.Add("3, Hanif")
team.Add("4, Kerim")
team.Add("5, Alex")
team.Add("6, Mark")
team.Add("7, Roger")
team.Add("8, Tommy")
C. Dim team As New Dictionary(Of Integer, String)
team.Add(1, "Hance")
team.Add(2, "Jim")
team.Add(3, "Hanif")
team.Add(4, "Kerim")
team.Add(5, "Alex")
team.Add(6, "Mark")
team.Add(7, "Roger")
team.Add(8, "Tommy")
D. Dim team As String() = New String() { _
"1, Hance", _
"2, Jim", _
"3, Hanif", _
"4, Kerim", _
"5, Alex", _
"6, Mark", _
"7, Roger", _
"8, Tommy"}
Answer: C

2. You are writing a method that returns an ArrayList named al.
You need to ensure that changes to the ArrayList are performed in a thread-safe manner.
Which code segment should you use?
A. Dim al As ArrayList = New ArrayList()
SyncLock al.SyncRoot
   Return al
End SyncLock
B. Dim al As ArrayList = New ArrayList()
SyncLock al.SyncRoot.GetType()
   Return al
End SyncLock
C. Dim al As ArrayList = New ArrayList()
Monitor.Enter(al)
Monitor.Exit(al)
Return al
D. Dim al As ArrayList = New ArrayList()
Dim sync_al as ArrayList = ArrayList.Synchronized(al)
Return sync_al
Answer: D

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