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4613Martingale First Step 18Before interpreting d2 economically in the martingale derivation, what should you know first?数理金融中等essay未尝试面试订阅4638Before using qBefore introducing risk-neutral probabilities inside the replication route, what more primitive object should you already have in hand?数理金融中等essay未尝试面试订阅4639Before discussing completenessWhat should you inspect first before saying replication will produce a unique price?数理金融中等essay未尝试面试订阅4655Assumption Breakdown Diagnostic 15Before blaming every option-pricing error on volatility misspecification, what should you ask first?数理金融中等essay未尝试面试订阅4661Assumption Breakdown Diagnostic 21Before using a gamma-PnL approximation, what should you check first about the hedge interval?数理金融中等essay未尝试面试订阅4662Assumption Breakdown Diagnostic 22Before concluding that transaction costs dominate the hedge result, what unit check should you do first?数理金融中等essay未尝试面试订阅4663Assumption Breakdown Diagnostic 23Before explaining an implied-vol skew by jumps, what should you distinguish first?数理金融中等essay未尝试面试订阅4664Assumption Breakdown Diagnostic 24Before saying discrete hedging error is the whole story, what comparison should you make first?数理金融中等essay未尝试面试订阅4665Assumption Breakdown Diagnostic 25Before declaring the model wrong, what convention check should you perform first?数理金融中等essay未尝试面试订阅4680Local Vol Diagnostic 15Before trusting a local-vol calibration, what should you inspect first besides raw fit error?数理金融中等essay未尝试面试订阅4686Local Vol Diagnostic 21Before using a local-vol model for risk, what should you ask first about the intended use case?数理金融中等essay未尝试面试订阅4687Local Vol Diagnostic 22Before overinterpreting a local-vol surface slope, what should you check first about the data that produced it?数理金融中等essay未尝试面试订阅4688Local Vol Diagnostic 23Before comparing a local-vol surface across two calibration dates, what should you align first?数理金融中等essay未尝试面试订阅4689Local Vol Diagnostic 24Before saying local vol 'explains' skew, what distinction should you make first?数理金融中等essay未尝试面试订阅4690Local Vol Diagnostic 25Before blaming local vol for every dynamic mismatch, what baseline should you check first?数理金融中等essay未尝试面试订阅4697Long-Run Mean Implied by an Average-Variance TargetSuppose expected average variance over one year is E[(1/T)∫ 0 T v s ds] = 0.097927 in a mean-reverting stochastic-vol model with current variance v0 = 0.12, kappa = 1, and T = 1. What long-run mean theta is implied?数理金融中等数值题未尝试面试订阅4699Starting Variance Implied by an Average-Variance TargetA stochastic-vol model has long-run mean theta = 0.05, mean-reversion speed kappa = 1, and horizon T = 1. If expected average variance over that year is 0.081606, what starting variance v0 is implied?数理金融中等数值题未尝试面试订阅4700Mean-Reversion Speed Implied by a One-Year Forward Variance TargetA stochastic-vol model has current variance v0 = 0.16 and long-run mean theta = 0.04. If the expected variance one year ahead is E[v 1] = 0.10, what mean-reversion speed kappa is implied?数理金融中等数值题未尝试面试订阅4705Stochastic Vol Diagnostic 15Before choosing a stochastic-vol model, what should you ask first about the empirical smile behavior you want to capture?数理金融中等essay未尝试面试订阅4711Stochastic Vol Diagnostic 21Before calibrating a stochastic-vol model, what baseline should you compare it against first?数理金融中等essay未尝试面试订阅