Cisco Senior Software Engineer interview questions

Hr called for the position G10 , initially discussed reg ctc and mentioned no issue for budget to this position , he sceduled 4 technical interviews , after completion of all rounds hr taken my documents to release the offer. after 3 days again hr called me now hr saying Not getting BU approval for CTC, if he is not getting approval , i dont no why he said before requesting ? , if is not getting approval he can call he can do the negotiation he didnt do that , he messaged me now BU not giving approvals , your profile on hold , interviewing with other candidates due to CTC issue Note : if CTC issue there why do conduct the interviews ? before interview only cisco taking details . 2 times i have faced same issue. plz dont waste our time and your time

online hacker rank 3 round of F2F interviews networking, OS, algo, C code, data structures reverse a linked list binary search tree binary tree bit magic add 2 numbers in linked list reverse a string how does tcpdump work how does ping work how does arp work how does bgp work how does ospf work how does ospf work how does vxlan work how does ospf work