Visa Inc. Staff Software Engineer interview questions

I had 4 rounds of interview. 1 online assessment, 2 technical and 1 hiring manager round which went well. However I received a rejected mail after a month long interview process and HR ghosted without proper intimation.

overall process was good. Interviewer were knowledgeable yet very grounded and supportive throughout interview process. it consist of total 4 rounds 1 online coding assessment(easy to medium level) 2. PS/DSA round with medium level questions where interviewer asked for solutions and were open to take any working solution, was not rigid about requiring answer he/she knows. they will just check your problem solving skill and bit on coding skill too but focus is more on logical thinking 3. HLD round , again interviewer was very nice and helped in not taking interview in wrong direction instead asked right and imp questions 4. HM round