How do I easily pass the Annamalai University DDE?

Any exam will become easier if you work hard with enough dedication, scoring good marks will not be difficult.

Firstly, start going through the notes from your first month onwards, only then you will fully get to utilize the contact classes. 

According to the several students reviewing online, Annamalai University is comparatively easier to prepare for than IGNOU. Many of the students often come to University with their families and stay in a lodge to do the course.

IGNOU will be a good choice if you want your medium of language to be Hindi.

While writing the answers try to describe them more. The additional paragraphs will definitely be considered during evaluation.

You should be clear about the subjects and be familiar with your strengths and weaknesses. Spend more time in the preparation of those. You can also refer to the model paper which is available online. It is suggested that you just go through it and prepare for the exam accordingly.