To my surprise that the interviewer is not able to speak English. I thought Byte dance was an international company. This caught me in surprise. Also he is lated for 30 minute and stormed in start asking question in bad attitude. 1. Introduce myself. 2. Ask how the data base engine was implemented. 3. Some knowledge of Hadoop. 4. Coding: 3 sorted array into 1 sorted array. 5. Some HARD DP coding problem.