How is E4x used with XML?
Is E4X Compatible with major browsers?
How can we use E4X to make XML easier?
What do you understand by E4X?
What do you know about ECMA?
Is there any difference between Javascript and ECMAScript?
Can a XML document be defined as a javascript object using E4X?
How can it be used in Mozilla / Firefox browsers?
These were some important questions for E4X Job technical interviews. You can see more sample practice tests and questions for placement papers and other written exams here.