The CompTIA Linux+ XK0-004 Cert Guide comes with various interactive learning resources to help you pass the XK0-004 exam. The assessment engine offers you a wealth of customization options and reporting features to specialize the course for you. Lab simulates real-world, hardware, software and command line interface environments and can be mapped to any text-book, course or training. This online assessment engine enables you to access practice tests on any desktop, laptop, tablet, or smartphone device with Internet connectivity.