Basic JavaScript Question:

Download Job Interview Questions and Answers PDF

What does the term sticky session mean in a web-farm scenario? Why would you use a sticky session? What is the potential disadvantage of using a sticky session?

JavaScript Interview Question
JavaScript Interview Question

Answer:

Sticky session refers to the feature of many commercial load balancing solutions for web-farms to route the requests for a particular session to the same physical machine that serviced the first request for that session. This is mainly used to ensure that a in-proc session is not lost as a result of requests for a session being routed to different servers. Since requests for a user are always routed to the same machine that first served the request for that session, sticky sessions can cause uneven load distribution across servers.

Download JavaScript Interview Questions And Answers PDF

Previous QuestionNext Question
What is this keyword? You have an ASP. NET web application running on a web-farm that does not use sticky sessions - so the requests for a session are not guaranteed to be served the same machine. Occasionally, the users get error message Validation of view state MAC failed. What could be one reason that is causing this error?