UBS Quantitative Analyst Intern interview questions

How would you treat historical data for forecasting? (see trend and seasonality reduction and ARIMA) How to test whether two samples are statistically similar? (t-test, p-value) What parameters would you consider for the repayment of customer credit loans? Assuming, you have these data, what statistical test would you run to make credit decisions? (Logit regression) Recall the definition and use of R^2 and adjusted R^2 in statistics. Why is the latter considered better than the former? What is the difference between INNER JOIN and LEFT JOIN in SQL?