Cisco Interview Experience 2020
Cisco visited our campus during mid-September for full-time roles.
Online Round:
An online round was conducted on HackerRank and there were 2 coding
questions and 15 Multiple Choice Questions and the time limit was 60min.
MCQs consisted of aptitude, CS fundamental topics like operating systems,
Networking, DBMS and basic C I/O questions(MCQs from gfg are enough).
NOTE: For coding C++ was not allowed.
Round 2 (Technical Round- Face to Face on CISCO Teams):
The Technical round
started with the introduction first both the interviewers Introduced themselves and after
that, I introduced myself.
It started with brief discussion on projects.
After that,they asked coding questions
1. Given an array of strings and string s.Find whether string s exist in the array or
not.
First, I gave them brute-force approach and they told me write the code.
Then, they asked me to optimize it.I gave them hashmap and trie based approach
They further asked me about trie-data structures and asked me to implement it.
Also,they asked me how to implement auto-complete feature using trie
mentioned in one of my projects.
2. Given a sorted linked list and a target node.Insert the node at its correct position
After they went on asking questions on CS core subjects
Topic from Operating system
1.Process and threads
2. Multithreading
3.Inter-process communication and its different types.
Topics from Networking
1.OSI model
2.Classlful addressing and classless addressing and how can we convert
classful into classless?
3.DNS queries and steps involved.
4.What happens when we type “www.google.com” in our browser?
Round 3 (Managerial round):
This was one the best interviews I had given.Interviewer was quite relaxed and
chilled guy.Interview started with discussion on projects and I answered many of
them.Then he asked “which is your favourite subject”
I told him Algorithms.He then asked about Dijkstra algorithm and its limitations.
Then,he asked few puzzles
1. Two trains are approaching each other with speed of 100m/s and are 1km
apart.
Find the time at which collision occurs(5s).
Suppose both the driver apply brakes in such a way that speed is halved each
second for both the trains.Find whether trains will collide or not.
Now suppose drivers of both the trains are sleeping.Find the time after which if
they wake up so that collision can’t be avoided.
2. Similar to
https://www.geeksforgeeks.org/puzzle-17-ratio-of-boys-and-girls-in-a-country-wh
ere-people-want-only-boys/?ref=lbp
He further asked about class overloading in c++.
Garbage collection in java and its internal functioning.
Also,he asked some questions from networking like Difference b/w TCP and UDP
And TCP 3-way handshaking and connection establishment and termination in
TCP also differences b/w IPv4 and IPv6.
Round 4(HR round): This round began with an introduction.Then he told me to
explain all the projects and brief discussion on that.Then, he asked
Where do you see yourself in 5 yrs?
What are your strengths and weakness?
Why Cisco?
Competitors of Cisco.
Which job profile would you prefer?
Where would you prefer to work(Bangalore,Pune,Chennai)?
At last he asked, Do you have any questions for us?
Verdict: selected
Tips: Be confident with what you know or simply tell them I don’t know or No Idea
otherwise.
KISHLAY KUMAR
CSE 2k21
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