INTERVIEW QUESTIONS J2EE JSF DETAILS

Question: What is the difference between JSP-EL and JSF-EL?

Answer: JSP-EL JSF-EL
In JSP-EL the value expressions are delimited by ${…}. In JSf-EL the value expressions are delimited by #{…}.
The ${…} delimiter denotes the immediate evaluation of the expressions, at the time that the application server processes the page. The #{…} delimiter denotes deferred evaluation. With deferred evaluation ,the application server retains the expression and evaluates it whenever a value is needed.

note:As of JSF 1.2 and JSP 2.1 ,the syntax of both expression languages has been unified

JSP-EL JSF-EL
In JSP-EL the value expressions are delimited by ${…}. In JSf-EL the value expressions are delimited by #{…}.
The ${…} delimiter denotes the immediate evaluation of the expressions, at the time that the application server processes the page. The #{…} delimiter denotes deferred evaluation. With deferred evaluation ,the application server retains the expression and evaluates it whenever a value is needed.

note:As of JSF 1.2 and JSP 2.1 ,the syntax of both expression languages has been unified Source: CoolInterview.com

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