No one is willing to re-study and pay again to sit the exam. Unfortunately, sometimes they may get fail even if they are well prepared. To avoid failing, the best solution is to take practice tests before writing the actual exam. So, You can do practice until you have confidence. If you want to practice for the CompTIA Server+ exam? I recommend IOS mobile apps that come with 60 questions in the demo version and 275 questions approximately in the full version that includes multiple-choice, text/image-based Drag/Drop, Exhibit types questions. You can download the server+ practice tests ios mobile apps from the app store that give you CompTIA Server+ test questions with detailed flash Cards. https://www.anandsoft.com/ios-apps/serverplus-ios-apps.html
All the questions you see in practice tests are prepared and validated by experts and updates continuously as per the latest exam objectives of CompTIA Server+. The candidate can study or practice the questions in the learn mode and take the test in the exam mode. This will help you determine what the actual test environments are and how to manage your time on the test and will help you determine your preparation levels for the test.
About Server+ Certification: CompTIA Server+ Sk0-004 test certifies that the successful candidate has the knowledge and skills required to build, maintain, troubleshoot, secure and support server hardware and software technologies, including virtualization. It covers server architecture, administration, storage, security, networking, troubleshooting as well as disaster recovery.