The Union Budget 2015-16 aims to position India as the fastest growing large economy, with a projected GDP growth of 7.4% and a focus on infrastructure development, agriculture, and financial inclusion. Key initiatives include the Goods and Services Tax (GST), a significant push for housing, and strengthening rural economies through various schemes. The government faces challenges such as maintaining fiscal discipline and boosting agricultural incomes while promoting entrepreneurship and improving the ease of doing business.