QPReP stands for "Question Paper Representation and Practice Platform". It is an online platform developed by the UPSC for candidates appearing in various competitive exams, including the CDS exam. The QPReP platform provides candidates with the opportunity to practice and familiarize themselves with the exam format and pattern. It contains a pool of mock test papers that are designed to simulate the actual exam and cover all the topics and subjects included in the syllabus. The platform also provides instant feedback and performance analysis to help candidates identify their strengths and weaknesses and improve their preparation. The QPReP platform is available to all registered candidates for the CDS exam and can be accessed through the UPSC's official website. Candidates can log in to their account and choose the mock test papers they wish to attempt. The platform also allows candidates to customize the test papers according to their preferences, such as the number of questions, difficulty level, and time limit. Overall, QPReP is a useful tool for candidates appearing in the CDS exam to enhance their preparation and increase their chances of success.