Whizlabs has improved all of its Exam Simulators.They are good now. When you download the SCDJWS trail software from http://www.whizlabs.com/scdjws/scdjws-details.html
You will get below 2 things.
1) Free mock exam of 22 questions with answers
2) One complete Diagnostic exam with 69 questioins but there is no answers.
Eventhough there are no answers, all these questions are very helpful in preparation.
If you like the questions very much then you can buy the software also.