Sir, first and foremost congratulations on qualifying as a Chartered Accountant. I urge you to have patience in life, in order to taste the fruits of success. In order to impress upon the interviewer, you need to hone your communication skills, be up to speed on various changes in corporate and financial world. You need to start gearing up for the challenge by regularly updating yourself on various current affairs from business dailies, magazines news channels, professional journals, seminars, workshops etc. Yes, knowledge of information technology is also very pivotal and I agree with the suggestions made by Amit sir.
Wish you a grand success for all your future endeavors.
Regards
Sathish