Hello, 

being a mechanical eanginner u do have less chances in getting placement selection.but u can get a job in ur core with less chances and u can try for jobs related to it or c.s side sp it canbe easy to get ajob.

preparing for mnc is nothing like that if ur well enough expressive and good percentage and impressive communication skills u will surely get in ant mnc.

,hope u will surely be beneficial  of this answer.

keep up hope.

all the best.

best regards for your future and  seccessful career.