Credit analysis requires core financial skills as they are supposed to work with financial records day in and day out. A credit analyst is required to analyze the financials of the company in order to judge their credit quality. They build financial models in order to estimate the company's valuation using various ratios. They also monitor the capital markets to comprehend the positions of various bonds. Looking at these requirements the employers would look for candidates who are well versed with financial statements viz. income statement, balance sheet, cash flows and funds flow statement. Another important are which just cannot be ignored are the financial ratios particularly the liquidity and profitability ones. Expect a lot of questions on these topics. You could also be asked questions on the various tools and techniques required in financial modeling and valuation. Make sure you have put efforts in understanding techniques like Microsoft excel and SPSS.