This concise book is specially published for the aspirants of ‘SSC CHSL (10+2) – Data Entry Operator (DEO)/Lower Division Clerk (LDC)/Junior Secretariat Assistant (JSA) TIER-I Exam. The book comprises, along with the Latest Study and Practice Material, Previous Years’ Solved Papers to make you familiar with the latest trends of exams, exam pattern and the type of questions asked with their answers.The book is highly recommended to Sharpen your Problem Solving Skills with thorough practice of numerous solved questions provided in the book, and prepare you to face the exam with Confidence, Successfully.The book comprises ample Study Material and Exhaustive Exercises with Multiple Choice Question-Answers on all the relevant subjects and topics important for the exam. All the practice-questions have been solved by the respective subject-experts with due diligence.While the specialised study and practice material of this book is aimed to Get you Success easily, your own study and practice with this will definitely Ensure you Success in the exam.