Answer:
(Fatwa: 794D=99K/1430)
Your income is halal in the present company as well. And, if you work in any other company on the ground of experience gained in this company, its salary also will be lawful provided you fulfil your responsibilities and shun any unlawful act in the company. As far as the matter of your friend telling you the model of paper is concerned, you neither violated the examination rules nor committed anything against Shariah. So, now when you have revealed all the matter to the chairman of the company, you should not worry. This is either the fault of exam system or your good luck.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
