Which of the following is the correct implementation of the interface given below?

Let's imagine we have to declare some data type with name "DataType" which has to store text data. It will be used only for data storage, won't perform any operations and should work as fast as possible. Please write first line for this data type declaration (heading without any brackets) .

Which of the following is the correct way to create an object of the class Sample?

1. Sample s = new Sample();
2. Sample s;
3. Sample s; s = new Sample();
4. s = new Sample();

For the code snippet shown below, which of the following statements are valid?

Which of the following is a valid delegate definition?

Which of the following is the correct way to define and initialize an array of 4 integers?