CertExams.com SCJP (Short for Sun Certified Java Programmer) has the following features: -250+ multiple choice questions: The multple choice questions are thoroughly researched to provide hightly relevant questions with difficult to choose answers. Drag-n-drop questions are also available that simulate actual exam environment. -Thoroughly tested and debugged answers -Comprehensive help file: The complete simulator is explained in an easy to use help file. The areas covered in the help file include 1. Supported commands, 2. How to navigate through the lab exercises and router console simulator, 3. Disclaimer -Flash cards: Flash cards are available while taking several lab exercises. These provide topic help, and useful in properly answering the labs. Limitations of Demo: The download contains a demo simulator, and a full version that requires purchasing a key for unlocking the software. The demo has limitations such as limited labs, and limited support for router commands.