Most books available in the market for NATA or JEE Paper 2 have excessive syllabus. You would end up putting in efforts in topics not included in the syllabus.

The portions of NATA & JEE paper 2 Mathematics are basically your 11th & 12th class subjects. For the detailed syllabus, you can refer to the following resources

NATA Brochure (https://online.cbexams.com/nata/images/NATA2019Brochure.pdf?v1) or the

JEE Information bulletin (https://jeemain.nic.in/WebInfo/Handler/FileHandler.ashx?i=File&ii=14&iii=Y)

That should be sufficient for you to get an idea what comes in the exam

All of these topics are covered in DQ Edge and updated on a daily basis so you would not need to refer to any books.

The UCEED content DQ Edge has all and more you would require. You do not need any book.

The advantages of DQ Edge over any book are -

1. DQ Edge content is updated on a daily basis - so you always have the latest study material. A book is outdated by the time it goes to print
2. DQ Edge understands you - it will tell you what to study next so you can prioritize and cover all topics in terms of importance and relevance from an exam perspective. A book will only give you a question bank.
3. DQ Edge will tell you if you have understood a concept or not - With Cognitive Analytics, you will be able to make out which topics you have not understood and helps you study that effectively

No you will not get marks.

Hii

they will not consider because they correct according to the marking and you sheet will be considered as in valid

The cut off score for NID M.Des (Product Design) prelims varies every year. It depends on the number of students taking the test, difficulty level of the exam and the reservation quota applicable to the students. Hence, the score cannot be predicted each year. 

However, from past performance of students, a score of 70+ will be a safe score to target.