asp.net85. What do you understand by the culture?
The culture denotes a combination of a language and optionally a region or a country. The contents of a Web page of a multilingual Web site are changed according to the culture defined in the operating system of the user accessing the Web page.

86. What is the difference between absolute expiration and sliding-time expiration?
The absolute expiration expires a cached item after the provided expiration time. The sliding time does not expire the cached items because it increments the specified time.

87. What is the code-behind feature in ASP.NET?
The code-behind feature of ASP.NET enables you to divide an ASP.NET page into two files – one consisting of the presentation data, and the second, which is also called the code-behind file, consisting of all the business logic. The presentation data contains the interface elements, such as HTML controls and Web server controls, and the code-behind contains the event-handling process to handle the events that are fired by these controls. The file that contains the presentation data has the .aspx extension. The code behind file has either the .cs extension (if you are using the programming language C#) or the .vb (if you are using the programming language Visual Basic .NET) extension.

88. How can you check if all the validation controls on a Web page are valid and proper?
You can determine that all the validation controls on a Web page are properly working by writing code in the source file of the Web page using a scripting language, such as VBScript or JavaScript. To do this task, you have to loop across validators collection of pages and check the IsValid property of each validation control on the Web page to check whether or not the validation test is successful.

89. Explain the validation controls. How many validation controls in ASP.NET 4.0?
Validation controls are responsible to validate the data of an input control. Whenever you provide any input to an application, it performs the validation and displays an error message to user, in case the validation fails.
ASP.NET 4.0 contains the following six types of validation controls:
CompareValidator – Performs a comparison between the values contained in two controls.
CustomValidator – Writes your own method to perform extra validation.
RangeValidator- Checks value according to the range of value.
RegularExpressionValidator – Ensures that input is according to the specified pattern or not.
RequiredFieldValidator – Checks either a control is empty or not.
ValidationSummary – Displays a summary of all validation error in a central location.

90. What is difference between a Label control and a Literal control?
The Label control’s final html code has an HTML tag; whereas, the Literal control’s final html code contains only text, which is not surrounded by any HTML tag.

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