From platform 10 u will have a bus stand called chilalguda x roads bus stand
From there take 1v or 1d or 107 bus Better ask bus driver
And drop malakpet or nalagonda x roads bus stop
From...
more... nalagonda x roads bus stop u will find buses to saroornagar or ibrahimpatnam , tell the stop name as aware hospital or exam centre lingojiguda
And the exam centre will be beside bus stop only
Note u can directly find bus also from secunderabad railway station but it's frequency will be less bus number will be 277mv or 107
Bus conductors will be friendly keep asking them in hindi
Keep journey time planned as 2 hours
Metro routes will be longer but if you want metro u can try
For metro and mmts station will be malakpet