Harman International Interview Experience for Associate Software Engineer

I got selected through elitmus. After that, they have an online round in which there are 50 questions of ds and c which has to be done in 60 minutes. After that, they have an onsite interview in which they ask about c and data structures and about project 

Question:

1. What is a memory leak in c?
2. What is dangling pointer in c?
3. Write a program to search node in a binary search tree?
4. Write a program to insert in the linked list at a given position?
5. Layers of OSI model?
6. Explain your projects?
7. Difference between 32-bit and 64-bit processor?

After this, there is an HR round. Asked HR based questions