You have to crack any competitive exam to get Govt Job in any state or central government. For IAS, you can start preparation for UPSC Civil Services Exam and for banking sector, you should start preparation for IBPS Exam.
You can get Government jobs in India by starting smart exam preparation. You should start your exam preparation with basics and then advanced level.
Any graduate can appear in most exams for Govt Jobs in India. For example, any graduate can appear in UPSC, State Public Commission Exams, IBPS, SSC, Police Jobs etc…
Most exam are not requires any special degree except technical posts. So you can appear in most exams with any degree including Commerce, Arts, Science etc.
Top 10 highest paying Government Jobs in India are IAS, IFS, IPS etc… Means civil servant has highest salary.
All exams taken by UPSC are hard / difficult including UPSC Civil Services, NDA / NA, CDS etc… because all these posts are super class I cadres.
You have to crack UPSC Civil Services exam to become a collector. There are three stages in UPSC CSE i.e. Preliminary Exam, Main Exam and Interview. Any graduate can appear in UPSC Civil Services exam.