70-536CSharp Exam

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Exam : Microsoft 70-536CSharp
Title : TS:MS.NET Framework 2.0-Application Develop Foundation


1. 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. ArrayList al = new ArrayList();
lock (al.SyncRoot)
{
return al;
}
B. ArrayList al = new ArrayList();
lock (al.SyncRoot.GetType())
{
return al;
}
C. ArrayList al = new ArrayList();
Monitor.Enter(al);
Monitor.Exit(al);
return al;
D. ArrayList al = new ArrayList();
ArrayList sync_al = ArrayList.Synchronized(al);
return sync_al;
Answer: D

2. You are writing a custom dictionary. The custom-dictionary class is named MyDictionary.
You need to ensure that the dictionary is type safe.
Which code segment should you use?
A. class MyDictionary : Dictionary<string, string>
B. class MyDictionary : HashTable
C. class MyDictionary : IDictionary
D. class MyDictionary { ... }
Dictionary<string, string> t =
new Dictionary<string, string>();
MyDictionary dictionary = (MyDictionary)t;
Answer: A

3. 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. Hashtable team = 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. ArrayList team = 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. Dictionary<int, string> team =
new Dictionary<int, 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. string[] team =
new string[] {"1, Hance",
"2, Jim", "3, Hanif",
"4, Kerim", "5, Alex",
"6, Mark", "7, Roger",
"8, Tommy"};
Answer: C

4. You are working on a debug build of an application.
You need to find the line of code that caused an exception to be thrown.
Which property of the Exception class should you use to achieve this goal?
A. Data
B. Message
C. StackTrace
D. Source
Answer: C

5. You are instantiating a variable to store only strings. The variable is named messageStore.
You need to ensure that string messages are read and processed in the order in which they are received.
Which code segment should you use?
A. Stack<string> messageStore = new Stack<string>();
messageStore.Push("This is a test message...");
B. Stack messageStore = new Stack();
messageStore.Push("This is a test message...");
C. Queue messageStore = new Queue();
messageStore.Enqueue("This is a test message...");
D. Queue<string> messageStore = new Queue<string>();
messageStore.Enqueue("This is a test message...");
Answer: D