Collection Classes - General Questions Online Exam Quiz
Collection Classes - General Questions GK Quiz. Question and Answers related to Collection Classes - General Questions. MCQ (Multiple Choice Questions with answers about Collection Classes - General Questions
Which of the following statements are correct about an ArrayList collection that implements the IEnumerable interface?
Options
A : 1 and 2 only
B : 1 and 3 and 4 only
C : 2 and 5 only
D : All of the above
How many enumerators will exist if four threads are simultaneously working on an ArrayList object?
Options
A : 1
B : 3
C : 2
D : 4
In which of the following collections is the Input/Output index-based?
Options
A : 1 and 2 only
B : 3 and 4 only
C : 5 only
D : 1, 2 and 5 only
In which of the following collections is the Input/Output based on a key?
Options
A : 1 and 2 only
B : 2 and 3 only
C : 1, 2 and 3 only
D : 4 and 5 only
In a HashTable Key cannot be null, but Value can be.
Options
A : True
B : False
C : -
D : -
Which of the following statements are correct about the Stack collection?
Options
A : 1 and 2 only
B : 3 and 4 only
C : 1, 2 and 5 only
D : All of the above
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");
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?
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);
Which of the following is NOT an interface declared in System.Collections namespace?
Options
A : IComparer
B : IEnumerable
C : IEnumerator
D : IDictionaryComparer
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?
Options
A : 4
B : 8
C : 16
D : 32
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