Tata Consultancy Services Associate Software Engineer interview questions

Started with TR 1) what is dns 2)no. Bits in ip address 3)can we create mac address with help of ip address 4)function of network layer 5)function of data link layer 6)what is semaphore 7)what are hashing technique 8)what are void pointers 9) Explain merge sort 10)what is malloc and calloc 11)condition for deadlock 12)register and stactic (storage classes)