Infosys raised its forecast for earnings growth from 8% to 8.5-9.0% in dollar terms for 2018-19.The country's second-largest software exporter Infosys reported on Friday a 30 per cent fall in quarterly profits amid seasonal weakness in IT sector and mounting expenses.The Bangalore-headquartered company also announced board approval for buyback of shares worth Rs 8,260 crore rupees ($1.184 billion) and raised its revenue forecast for current financial year."We had another strong quarter in our digital business with 33.1 per cent growth and large deals at $1.57 billion which gives us confidence entering 2019," chief executive Salil Parekh said in a statement.Infosys however raised its forecast for earnings growth from 8.0 per cent to 8.5-9.0 per cent in dollar terms for current fiscal year.The country's $150 billion IT sector has long been one of its flagship industries but is facing upheaval in face of automation, a failure to keep up with new technologies and visa restrictions.Infosys' rival and India's largest IT services exporter Tata Consultancy Services on Thursday reported a 24.1 per cent rise in net profit for quarter ending in December.