HSBC Associate Software Engineer interview questions

The company came to KIIT Campus on Nov 2022, my interviewer was seemed not to be interested, and he asked literally in all corners of project, core cs fundas and told me to write the full process of insertion, deletion and traversal of doubly linked list on paper, later he asked me to implement a trie. He seemed that when the student can't answer the qstn, so that he can reject it immediately.