Diploma

The highest salary offered by All India Institute of Medical Sciences, Patna was INR 25 Lacs per annum for DM in Pulmonary Medicine. The average salary for a DM in Pulmonary Medicine in India is INR 15 Lacs per annum. The institute provides world-class pulmonary services to their patients suffering from lungs disorder/diseases. However, the salary packages may vary from year to year, and the highest package offered may not be the same every year.

The cutoff for the previous year (2022-23) is as follows:General Category: 1,634NRI Category: 1,424SC Category: 1,084ST Category: 984PH Category: 984

Yes you can visit the career page of Google.Google even offers jobs without any degree .They give preference to skills rather than ornamental degrees.You can definitely apply for Google if you have some demanding skills and you can do something for them.

No, you cannot get admission to the first year of B.Tech in IIT or NIT after completing a Diploma. 

The 8 foundation level courses in the online Diploma in Data Science programme offered by IIT Madras are:Introduction to Data ScienceProgramming with PythonData Structures and AlgorithmsProbability and StatisticsMachine LearningDeep LearningNatural Language ProcessingData Visualization

For admission to after 10th Diploma courses at Periyar University, candidates must fulfil the basic eligibility criteria as suggested by the university. As per the selection criteria, candidates are selected based on their merit obtained in Class 10. The minimum eligibility criteria is to pass Class 10. To apply for this course, an online application can be filled and need to submit it at the university's concerned department, within the application deadline. 

There are so many colleges for you, also you should know in which field you want to do Diploma. Some of them I'll be listing here-Assam Down Town University (ADTU), GuwahatiAMET University Kanathur-Tamil NaduAlakh Prakash Goyal Shimla University-APGSU   , etc.Above are some private universities where you can take admission and there are more also as in Government Colleges there are almost no chances that they give admission. 

Sorry to say this, but now nothing you can do rather than waiting for next year or you can see other colleges.