Visa Inc. Software Development Engineer (SDE) interview questions

very easy 4 questions all from easy to medium questions of dsa but im bad i could only do 3/4 eaxh question i s 300 points and you probably need to solve all 4 to get any kind of next round offwer

First round : coding challenge They selected 10 students out of 60 people who gave the test Second round : dsa + sql third round : dsa + sql + cs basics lead round : system design They offered 3 students ( all boys ) from our batch