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C# Programming :: Collection Classes

Collection Classes - General Questions

  1. Suppose value of the Capacity property of ArrayList Collection is set to 4. What will be the capacity of the Collection on adding fifth element to it?

    2. A.
    4
    B.
    8
    C.
    16
    D.
    32

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  2. Which of the following is an ordered collection class?

    1. Map
    2. Stack
    3. Queue
    4. BitArray
    5. HashTable

    3. A.
    1 only
    B.
    2 and 3 only
    C.
    4 and 5 only
    D.
    All of the above
    E.
    None of the above

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  3. Which of the following is the correct way to find out the number of elements currently present in an ArrayList Collection called arr?

    4. A.
    arr.Count
    B.
    arr.GrowSize
    C.
    arr.MaxIndex
    D.
    arr.Capacity
    E.
    arr.UpperBound

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  4. Which of the following statements are correct about a HashTable collection?

    1. It is a keyed collection.
    2. It is a ordered collection.
    3. It is an indexed collection.
    4. It implements a IDictionaryEnumerator interface in its inner class.
    5. The key - value pairs present in a HashTable can be accessed using the Keys and Values properties of the inner class that implements the IDictionaryEnumerator interface.

    5. A.
    1 and 2 only
    B.
    1, 2 and 3 only
    C.
    4 and 5 only
    D.
    1, 4 and 5 only
    E.
    All of the above

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  5. Which of the following is the correct way to access all elements of the Stack collection created using the C#.NET code snippet given below?

     Stack st = new Stack();
 st.Push(11); 
 st.Push(22);
 st.Push(-53); 
 st.Push(33);
 st.Push(66);

    6. A. 
     IEnumerable e;
 e = st.GetEnumerator(); 
 while (e.MoveNext()) 
 Console.WriteLine(e.Current);
    B. 
     IEnumerator e;
 e = st.GetEnumerable();
 while (e.MoveNext())
 Console.WriteLine(e.Current);
    C. 
     IEnumerator e;
 e = st.GetEnumerator(); 
 while (e.MoveNext())  
 Console.WriteLine(e.Current);
    D. 
     IEnumerator e;
 e = Stack.GetEnumerator(); 
 while (e.MoveNext())  
 Console.WriteLine(e.Current);

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  6. Which of the following statements are correct about the Collection Classes available in Framework Class Library?

    7. A.
    Elements of a collection cannot be transmitted over a network.
    B.
    Elements stored in a collection can be retrieved but cannot be modified.
    C.
    It is not easy to adopt the existing Collection classes for newtype of objects.
    D.
    Elements stored in a collection can be modified only if allelements are of similar types.
    E.
    They use efficient algorithms to manage the collection, thereby improving the performance of the program.

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