Exam 70-536 : .NET Framework Application Development Foundation Part – 4

Question: You need to select a class that is optimized for key-based item retrieval from both small and large collections. Which class should you choose?

1. OrderedDictionary class
2. HybridDictionary class
3. ListDictionary class
4. Hashtable class

Correct Answer: 2

Question: You are developing a custom-collection class. You need to create a method in your class. You need to ensure that the method you create in your class returns a type that is compatible with the Foreach statement. Which criterion should the method meet?

1. The method must return a type of either IEnumerator or IEnumerable.
2. The method must return a type of IComparable.
3. The method must explicitly contain a collection.
4. The method must be the only iterator in the class.

Correct Answer: 1

Question: You write the following code.
public delegate void FaxDocs(object sender, FaxArgs args);
You need to create an event that will invoke FaxDocs. Which code segment should you use?

1. public static event FaxDocs Fax;
2. public static event Fax FaxDocs;
3. public class FaxArgs : EventArgs {
private string coverPageInfo;
public FaxArgs(string coverInfo) {
this.coverPageInfo = coverPageInfo;
}
public string CoverPageInformation {
get {return this.coverPageInfo;}
}}
4. public class FaxArgs : EventArgs {
private string coverPageInfo;
public string CoverPageInformation {
get {return this.coverPageInfo;}
}}

Correct Answer: 1

Question: 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?

1. class MyDictionary : Dictionary<string, string>
2. class MyDictionary : HashTable
3. class MyDictionary : IDictionary
4. class MyDictionary { ... }
Dictionary<string, string> t = new Dictionary<string, string>();
MyDictionary dictionary = (MyDictionary)t;

Correct Answer: 1

Question: You are developing a custom event handler to automatically print all open documents. The event handler helps specify the number of copies to be printed. You need to develop a custom event arguments class to pass as a parameter to the event handler. Which code segment should you use?

1. public class PrintingArgs
{
private int copies;
public PrintingArgs(int numberOfCopies)
{
this.copies = numberOfCopies;
}
public int Copies
{
get
{
return this.copies;
}
}
}
2. public class PrintingArgs : EventArgs {
private int copies;
public PrintingArgs(int numberOfCopies) {
this.copies = numberOfCopies;
}
public int Copies {
get { return this.copies; }
}
}
3. public class PrintingArgs {
private EventArgs eventArgs;
public PrintingArgs(EventArgs ea) {
this.eventArgs = ea;
}
public EventArgs Args {
get { return eventArgs; }
}
}
4. public class PrintingArgs : EventArgs {
private int copies;
}

Correct Answer: 2