Design

I guess details regarding your graduation would reflect on your final pass certificate, but you should not be bothered much by it. Part-time/Distance courses are fully recognized by various organisations and getting a job would not be much of an issue.
Diverse job opportunities exist in front of interior design professionals. They may either choose to work under supervised setup (Design studios and Interior design firms) or work independently. When it comes to Government sector jobs, PWDs, Municipal Corporations and Town Planning Departments are known to hire interior design professionals. They may also become part of Government schemes related to housing and relocation of people.
Some of the well known recruiters include-
Interior Design firms
Architecture and Design firms
Infrastructure and Property Developers
Furniture Manufacturing and Designing firms
Interior Design shops
If one has entrepreneurship skills and access to decent financial resources, one may start own interior design firm or consultancy service. Other than that, one may also design and sell own interior decoration and utility products.

For (Design Aptitude Test), there isn't much that you can do. Firstly, and most importantly, you should have an aptitude for design. NID papers are designed in such a way that only those who have a creative side will be able to clear it. The question paper is a mix of creativity, logical thinking and general knowledge. You need to be aware of the latest happenings in the world. Cramming up yearbooks won't help you, seriously. Instead make a habit of reading the newspaper every day.
After clearing that, you'll have to prepare for the studio test and the personal interview. The studio test judges you on your material handling and of course creativity. You could be provided any material, like clay, terracotta, cardboard anything and from a set of themes, you may have to design something of your choice. Since it is time bound, you have to be real quick and efficiently use the materials provided to you.
The personal interview is where the faculty evaluates you in person. They may ask you about your hobbies, interests and even talent. They may even ask you to sing if you're a singer. If you have a history of artwork, you get to showcase it to them. Whatever you have done till now, be it a random sketch or doodle, bring it along. But make sure it's your own work otherwise you may get caught and it's not that difficult for them to do so. Make sure that your portfolio stands out. It should speak for you and define you. Don't try to include or steal somebody else's ideas. Be unique and come up with something from your side. Follow your instinct.
For all this, you can join some coaching institute which will help you ENHANCE your creative side. There are a lot of coaching institutes like BRDS, Skyblue, Silica, Pahal Design and the list goes on. But I would suggest you go ahead with BRDS because they have the maximum selections every year and also the material provided by them is good. Even if you don't wish to join any coaching institute, that's okay. I have friends who have cleared NID without joining any coaching and who even after joining such institutes haven't cleared any of the design entrances.
Lastly, don't stress about the exam much! Stress makes you think less creatively and that is something you wouldn't want to happen on the day of exam. For the interview, don't worry at all. Be confident and be yourself.

1. Establish visual hierarchy
Visual hierarchy is organizing information by order of relative importance, and it is established by arranging components (typography, lines, shapes, images, color, and space) on a layout. Designs with strong visual hierarchy and composition will communicate a message by seamlessly guiding your eyes.
2. Use Gestalt principles
All designers should understand Gestalt Theory and the principles of visual perception. Gestalt Theory was developed in the early 1900s by German psychologists, who theorized ways in which humans organize visual experiences. Designers nowadays use Gestalt principles as a framework for more effective visual communication.
3. Check your fonts
Designers should make sure that words are both legible and readable. The older I get, the less patience I have for deciphering tiny, ultra-thin, or lightly colored words.