DP World Software Development Engineer SDE interview questions

3 rounds: 1st round: DSA-2 questions (topics: stack, array), Difficulty: easy and medium 2nd round: DSA-2 questions (topics: array+sorting, heap) Difficulty: both medium 3rd round: Hiring Manager: OOPs, DBMS(ACID properties in very detail), behavioural

4 rounds 3 dsa rounds 4th managerial round medium level of interview , kind of luck based . 3 rounds were just dsa and resume and i was able to solve all 4th round i was asked to design whatsapp , i kind of did bad there .