Hi Venkatesh ,
I didn't get a chance to lay my hands on Cade's book, so comaparing Allan & Bambara with it will be difficult for me. Overall Allan & Bambara is satisfactory ( it covers things in much details ).
There were 3-4 questions on ejb. They are not so difficult (because i had been into ejb for close to 1.5 yrs now, for a beginner they might seem difficult).