Which of the following is the correct way to implement the interface given below?

interface IPerson
{ 
    String FirstName
    {
        get;
        set; 
    } 
}

                                
A.class Employee : IPerson
{
    private String str; 
    public String FirstName
    {
        get
        { 
            return str;
        } 
        set
        { 
            str = value;
        } 
    } 
}
B.class Employee
{
    private String str;
    public String IPerson.FirstName
    { 
        get
        { 
            return str;
        } 
        set
        { 
            str = value;
        } 
    } 
}
C.class Employee : implements IPerson
{
    private String str; 
    public String FirstName
    { 
        get
        { 
            return str;
        } 
        set
        {
            str = value; 
        } 
    } 
}
D.None of the above
                              
Click To Show Ans:A
                        

                                

Which of the following statements are correct about an ArrayList collection that implements the IEnumerable interface?


The ArrayList class contains an inner class that implements the IEnumerator interface.

An ArrayList Collection cannot be accessed simultaneously by different threads.

The inner class of ArrayList can access ArrayList class's members.

To access members of ArrayList from the inner class, it is necessary to pass ArrayList class's reference to it.

Enumerator's of ArrayList Collection can manipulate the array.



                                
A.1 and 2 only
B.1 and 3 and 4 only
C.2 and 5 only
D.All of the above
E.None of the above
                              
Click To Show Ans:B
                        

                                
How many enumerators will exist if four threads are simultaneously working on an ArrayList object?
                                
A.1
B.3
C.2
D.4
E.Depends upon the Project Setting made in Visual Studio.NET.
                              
Click To Show Ans:D
                        

                                

In which of the following collections is the Input/Output index-based?



Stack 


Queue


BitArray


ArrayList


HashTable



                                
A.1 and 2 only
B.3 and 4 only
C.5 only
D.1, 2 and 5 only
E.All of the above
                              
Click To Show Ans:B
                        

                                

In which of the following collections is the Input/Output based on a key?



Map


Stack


BitArray


HashTable


SortedList



                                
A.1 and 2 only
B.2 and 3 only
C.1, 2 and 3 only
D.4 and 5 only
E.All of the above
                              
Click To Show Ans:D