At the end of every chapter, there are unsolved problems labeled "University Questions" and "Competitive Exam Questions." Do not skip these. If you can solve the "GATE" marked ones, you are ready for national level exams.
Since you have a digital copy, use the snipping tool or screenshot feature. Create a single document of:
Engineering textbooks are heavy. A 1,000+ page book like this one is not backpack-friendly. A PDF on a smartphone or tablet allows students to study between lectures, in the library, or while commuting.