Which of the following is the correct way to access all elements of the Stack co

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Question
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);
```
Options

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);

Correct Answer

IEnumerator e;
e = st.GetEnumerator(); 
while (e.MoveNext()) 
Console.WriteLine(e.Current);

Collection Classes problems

Search Results

1. Which of the following is the correct way to access all elements of the Queue collection created using the C#.NET code snippet given below?
```
Queue q = new Queue(); 
q.Enqueue("Sachin"); 
q.Enqueue('A'); 
q.Enqueue(false); 
q.Enqueue(38); 
q.Enqueue(5.4);
```
Options

A.

IEnumerator e;
e = q.GetEnumerator(); 
while (e.MoveNext())
Console.WriteLine(e.Current);

B.

IEnumerable e;
e = q.GetEnumerator(); 
while (e.MoveNext()) 
Console.WriteLine(e.Current);

C.

IEnumerator e;
e = q.GetEnumerable(); 
while (e.MoveNext()) 
Console.WriteLine(e.Current);

D.

IEnumerator e;
e = Queue.GetEnumerator(); 
while (e.MoveNext()) 
Console.WriteLine(e.Current);

Correct Answer:

IEnumerator e;
e = q.GetEnumerator(); 
while (e.MoveNext())
Console.WriteLine(e.Current);

2. A HashTable t maintains a collection of names of states and capital city of each state. Which of the following is the correct way to find out whether "Kerala" state is present in this collection or not?
Options
A. t.ContainsKey("Kerala");
B. t.HasValue("Kerala");
C. t.HasKey("Kerala");
D. t.ContainsState("Kerala");
E. t.ContainsValue("Kerala");

3. Which of the following is an ordered collection class?
1. Map
2. Stack
3. Queue
4. BitArray
5. HashTable
Options
A. 1 only
B. 2 and 3 only
C. 4 and 5 only
D. All of the above
E. None of the above

4. In which of the following collections is the Input/Output index-based?
1. Stack
2. Queue
3. BitArray
4. ArrayList
5. HashTable
Options
A. 1 and 2 only
B. 3 and 4 only
C. 5 only
D. 1, 2 and 5 only
E. All of the above

5. Which of the following is NOT an interface declared in System.Collections namespace?
Options
A. IComparer
B. IEnumerable
C. IEnumerator
D. IDictionaryComparer
E. IDictionaryEnumerator

10. Which of the following is the correct way of applying the custom attribute called Tested which receives two-arguments - name of the tester and the testgrade?
1. Custom attribute cannot be applied to an assembly.
2. [assembly: Tested("Sachin", testgrade.Good)]
3. [Tested("Virat", testgrade.Excellent)]
  class customer { /* .... */ }
4. Custom attribute cannot be applied to a method.
5. Custom attribute cannot be applied to a class.
Options
A. 1 only
B. 1, 5
C. 2, 3
D. 4, 5
E. None of the above

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