If you want to crack CDS exam you should be attentive and determined to crack your exam.

Yes, there is sectional cut off in CDS exam. It is omportant to clear it.

You can follow below strategies to crack your exam

English

1- To prepare for English, one can develop the habit of reading the newspaper regularly.

2- One can refer to basic grammar books to clear the concepts.

3- Try to learn a couple of new words on a daily basis.

4- When you are learning the new words, also try to learn their antonyms and synonyms and also how to use the words in sentences.

5- Try solving past year's question papers so that you have an idea of what to expect

GK

1- Read newspapers regularly and watch television for the latest happenings in and around the world.

2- Read magazines that cover varied topics ranging from economy to business to trade policies to the latest awardees in the fields of sports, art, literature. In short, just be aware of all the topics because questions can come from anywhere.

3- Refer to past question papers and see the pattern of occurrence of the questions. That will give you an idea as to which topics to concentrate on.

Elementary Mathematics

1- Revise all the topics thoroughly

2- First, pick up the topics that you are strong at and practice thoroughly. Later move on the difficult ones and try to practice as much as possible

3- Concentrate on having a clear concept on all the topics.

Good Luck!!