Mock Test 2

1. You need to write an application in which you create a class that establishes a connection with SQL Server and reads records in a certain table. We need to ensure the following in the class:
   • The class should automatically release all the connections after the operation is complete.
   • The class should support iteration.

Which of the following interfaces would you implement in the class?

• 1. IEnumerator
  2. IEquatable
  3. IComparable
  4. IDisposable

2. If you need to write a function that could be called with a varying number of parameters, what would you use?

• 1. Interface
  2. Method overriding
  3. Method overloading
  4. Lamda expressions

3. You are writing an application in which you need to reverse a string. Which of the following code snippets would you use?
   1. char[] characters = str.ToCharArray();
      for (int start = 0, end = str.Length - 1; start < end; start++, end--)
      {
      characters...