Ollion Lead Engineer Interview Questions and Answers

Interview preparation tips for other job seekers - Read up on DS Algo and white paper coding and Leadership Principles

Round: Problem Statement
Experience: coding and submission before face to face interview shortlisting
Tips: practice coding ,coding is key to success for SE

Round: Resume Shortlist
Experience: based on marks ,I was called for F2F
Tips: the ppt was to be submitted explaining the approach

Round: Technical Interview
Experience: a lot of brain storming
Tips: understands the nitty gritty of the structs and algos

Round: Technical Interview
Experience: exact code was to be written instead of pseudo code
Tips: get hold of DS,Algos

Round: Group Discussion
Experience: Extempore was conducted which is almost same as GD. In Extempore round each individual should select his own topic and talk for 2 minutes. Eye donation was the topic selected by me. The main concept of this round is to check the fluency over language
Tips: Be confident in what you speak. Dont get nervoused in this round

Round: Problem Statement
Experience: Extempore was conducted which is almost same as GD. In Extempore round each individual should select his own topic and talk for 2 minutes. Eye donation was the topic selected by me. The main concept of this round is to check the fluency over language
Tips: Be confident in what you speak. Dont get nervoused in this round

Round: Group Discussion
Experience: Extempore was the name of the round. It is almost same as GD but instead each candidate should select his own topic and talk for 2 minutes.
Tips: Fluency over language is the main element focused in this round
Duration: 2 hours

Round: Problem Statement
Experience: In this round the candidate should attend online aptitude test for 1 hour. It consists of three parts : Logical part, Reasoning part, Language part. This round is easier one.
Tips: Concentrate more on English grammar

Round: HR Interview
Experience: Shortlisted candidates were called for HR round. For non IT students the main question asked was being a non IT student why do you choose corporate field.
Tips: The answer for this question cannot be provided by myself. Each of you candidates should build a genuine answer for this one

Round: Puzzle Interview
Experience: This is the final round of the whole interview process. In this round the candidates were focused asking only on puzzle questions. 3 to 5 questions were asked in this round depending upon the mentality of HR. 75 % score is required to clear this round
Tips: Just Google puzzle questions for interview, then work on those questions. You will get an idea on how to clear this round

Round: Resume Shortlist
Experience: We were asked to introduce ourselves and also speak about the environment of the room. Then asked to speak about Amazon and why do we want to work with Amazon
Tips: Be confident

Round: Test
Experience: Pronounciaton skills were examined
Tips: Flexible in talking in English
Duration: 20 minutes
Total Questions: 25

Round: HR Interview
Experience: HR was really cooperative he asked to relax and then started asking questions in a gentle manner. He made me feel comfortable. And reduced the nervous environment.
Tips: Be confident and don't be nervous

Skills: Language, Time Management
College Name: VHD central institute of home science

Round: Test
Experience: Aptitude was quite easy they just asked us basic questions from Math,logical reasoning and english
Tips: Just think well before u do..
Duration: 1 hour 30 minutes
Total Questions: 40

Round: Behavioural Interview
Experience: It was face to face .. the interviewee asked questions from our resume... Since I m from computer science background they asked some technical questions..

Tips: Beware filling ur resume.. they will ask every stuff that you have in resume

Round: Technical Interview
Experience: Discussion about my project that i vr done in my final year.they asked me what was my role in my project

College Name: Sri ganesh college of engineering and technology

Round: Test
Experience: The first test
contained 25 objective questions encompassing the basics of Computer Science ranging from
data structures, networks and operating systems to theory of computation
Duration: 45 minutes
Total Questions: 25

Round: Test
Experience: The second test contained 3 coding questions.
Duration: 45 minutes
Total Questions: 3

Round: HR Interview
Experience: After the written test, next day I appeared for 3 interviews.
They were checking if you can write code and also if you are aware of the practical issues faced while coding. In the final round they were testing if you could abstract out a real world
problem into code.
Tips: Overall I can say that you must hope for the best and prepare for the
worst. So make sure that you are prepared on all counts. You never know what might go wrong.

Round: Test
Experience: there were 20 MCQ which were on ds , networks and basic coding followed by 2 coding questions.
1) print all the distinct substrings of a given string in lexicographical order
2) find the max i-j value in the given array of 0's and 1's such that there are equal number of zeros and ones, where i is the starting index and j is the ending index of the array.
Tips: make sure that you pass atleast half the test cases for both the question.
Duration: 90 minutes
Total Questions: 22

Round: Technical Interview
Experience: 1) i printed left view then leaves and right view using three level order traversals . he asked me to use one traversal only, then i told him the approach and wrote the working code.
2) told him the approach and coded it.
Tips: look at corner cases properly. the interviewers were friendly, so i felt relaxed.

Round: Technical Interview
Experience: 1) i told him a recursive O(2^n) solution, optimised it to O(n^2). he told me to optimise further. Then i finally came up with O(n) solution after 5 min and he was satisfied . i coded it. he was satisfied finally :D .
2) came up with the approach immediately and coded it. he was satisfied.
Tips: he was very particular about corner cases and he checked the code througly tested it on some cases to ensure it was working.

General Tips: be cool. interviewers were friendly. tell them what you are thinking and be clear with the question before answering to avoid wasteage of time.
Skill Tips: solve problems from codechef, spoj and codeforces. solve interview questions from geeksforgeeks and careercup.
Skills: the way you think, coding skills and knowledge on data structures.
Duration: 3
College Name: IIT Roorkee
Motivation: some good seniors got intern, so i was inspired.
Funny Moments: on the interview day a person came into the conference room to call me for interview, i didnt thought he was interviewer. he was very simple, but intelligent and at last i felt like asking him to ask me one more coding question as it was fun solving questions infront of him, but i didnt do that as i was frightened if i would not be able to answer it would be a negative remark :P .