BENGALURU :Tata Consultancy Services, India's top software-services exporter, beat second-quarter revenue estimates on Thursday, aided by strength in its banking, financial services and insurance segment despite U.S. tariff-related uncertainty. The results boosted optimism around the country's $283 billion IT sector, which has been dealing with cautious client spending amid economic uncertainties, especially in North America, its largest market. "If there are no more tariff-related surprises,