Hi aspirant, 

The NIOS website may be down for some technical reasons which is unsure. You may call the authority up to know about details and follow up the procedure informed by them to follow up the registration process. The call details are available in their official website and you

Hello,

Yes 10th and 12th marks matter in campus placements. They are used for eligiblity purpose. Many companies now a days only allow students who have more than 60-65%(depends on company) to sit in placements. 

With this marks you have less chances of campus placements. But you can apply for

Hello aspirant!  Let me to inform you that according to the rules any student can write the jee mains examinations for three times and jee advance for two times and you will be eligible to get admission through jee mains and advance score if you have more than 75% marks

Dear student, with all the scores you have mentioned, you are definitely eligible for CAT 2019. You meet the specified criteria required for registration for CAT entrance exam. The registration for entrance exam has already begun on 7 August 2019 and will continue till 18 September 2019.

Dear student, as you have not got your provisional certificate due to the delay in results of the university, you may be given provisional admission if the University has such terms and conditions. Most University grant provisional admission while some do not accept such things.

Hello student,

You can write likewise:

Respected Sir,

I’m a student of Class 10th section A. I want you to allow me to repeat the same class as I left last year in the middle of my term due to some family problems. Now I want to continue my studies

See your backlogs will actually not matter during MBA admissions , but you have to clear your backlogs first before joining MBA in any college . Regarding your educational background also it will matter in some colleges like IIM'S , but other than IIM'S there are also many good colleges