collection classes programming question

11.

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?
A.     4    B.     8
C.     16    D.     32
Answer & Explanation

Answer: Option B

Explanation:

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12.

Which of the following is an ordered collection class?

Map
Stack
Queue
BitArray
HashTable

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

Answer: Option B

Explanation:

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13.

Which of the following is the correct way to find out the number of elements currently present in an ArrayList Collection called arr?
A.     arr.Count
B.     arr.GrowSize
C.     arr.MaxIndex
D.     arr.Capacity
E.     arr.UpperBound
Answer & Explanation

Answer: Option A

Explanation:

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14.

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

It is a keyed collection.
It is a ordered collection.
It is an indexed collection.
It implements a IDictionaryEnumerator interface in its inner class.
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.

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
Answer & Explanation

Answer: Option D

Explanation:

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15.

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);

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);

Answer & Explanation

Answer: Option C

Explanation:

No answer description available for this question.

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