There is nothing mentioned about the exam date of different job openings in Tech Mahindra on its official site. Only last date to apply for the post in mentioned which is as follows:

Principal Solution Architect
SAP SUP MOBILIT
03 Apr 2015

Team Lead
SAP SOLUTION MA
03 Apr 2015

Sr. Software Engineer
CUSTOMER RELATI
03 Apr 2015

Manager Testing
EMBEDDED SYSTEM
10 Mar 2015

System Analyst
WE HAVE A WEEKE
23 Mar 2015

Tech Mahindra Current Opportunities

to get to the Career page follow the below given steps:

Visit the official site of Tech Mahindra
Click to “Careers” on the top of the home page
Click to “Search” under “Search for jobs”
On the new page you will get all the openings
That page will look like this: