Interview Question on Query Strings in ASP.NET

Interview Question on QueryStrings

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1. What is a Query String?
A Query String is information that is appended to the end of a page URL. Query strings provide a simple and limited way to maintain state information.
2. How can you send data from one page to other page using Query String?
We can send data from one page to other page by appending that data to the URL For Example: To send ProductId information from page to other Order.aspx?ProductId=100 Use “&” symbol to separate multiple query string values, If we want to send ProductId and ProductName info Order.aspx? ProductId=100 & ProductName=’xxxx’ We can send Query strings from server side code using Response.Redirect For Ex: Response.Redirect(“Order.aspx?ProductId=100 & ProductName = ’xxxx’”);
3. What are the advantages of using Query String?
Simple implementation Does not require server resources Almost all browsers and client devices support using query strings to pass
4. What are the Disadvantages of using Query String?
Query strings are insecure because the information in the query string is directly visible to the user on the address line in the browser. Limited capacity: Some browsers and client devices impose a 2083-character limit on the length of URLs.
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