To answer this question, let's understand the IsPostBack property in the context of web development.
The IsPostBack property is commonly used in web development frameworks, such as ASP.NET, to determine whether a web page is being loaded for the first time or if it is a postback (i.e., a form submission or a server-side event triggered by a control).
The IsPostBack property returns a boolean value indicating whether the current request is a postback or not. In other words, it returns true if the page is being loaded as a result of a postback and false if it is the initial page load.
Now, let's go through each option to understand why it is correct or incorrect:
Option A) bit - This option is incorrect because the IsPostBack property does not return a bit data type. It returns a boolean value.
Option B) boolean - This option is correct because the IsPostBack property returns a boolean value indicating whether the current request is a postback or not.
Option C) int - This option is incorrect because the IsPostBack property does not return an int data type. It returns a boolean value.
Option D) string - This option is incorrect because the correct answer is not string. The IsPostBack property does not return a string data type.
Therefore, the correct answer is B) boolean. This option is correct because the IsPostBack property returns a boolean value indicating whether the current request is a postback or not.