Domanda di colloquio di Lowe's Home Improvement

I attended one round it was major based on java based questions 1 What is DI, hashmap internal working. 2 Does java support multiple inheritance. 3 Discussion on stringbuffer, builder. 4 One array based normal dsa question.I attended one round it was major based on java based questions 1 What is DI, hashmap internal working. 2 Does java support multiple inheritance. 3 Discussion on stringbuffer, builder. 4 One array based normal dsa question. 5 Also some general react.js question props and all usestate ?