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Interview Process   |   Interview Puzzles / Aptitude
Organization : Tellabs
Position : Software Engineer

Tellabs Interview Process


I applied at Tellabs for the post of Software Engineer via a recruiter. The process took just two days and I was interviewed at Tellabs. There were a total of four rounds in the hiring process at Tellabs.

Round 1 - First Face to Face Interview
The first interview was scheduled after I was contacted by the recruiter from Tellabs via a phone call. The first round was a basic introductory sort of interview. The interviewer asked everything about me from my studies to hobbies. I was asked about my college too and was asked many questions on my family as well. There was nothing technical asked in this round however.

Round 2 - Second Face to Face Interview
The second interview tested the basic technical skills. I was asked about the basic terminologies and their purposes. I was given a couple of easy algorithm based problems too. The questions were centered majorly on the basic data structures. A few programming related questions were asked too. The interview lasted for about an hour and he interviewer was impressed by me.

Round 3 - Third Face to Face Interview
This round was a bit more in depth than the previous round. There were a lot of technical questions and some of them were a bit difficult. However, they majorly concentrated on the basics only. The focused areas were data structures, mathematics formula based algorithms, and your preferred programming language.
Q1. Differentiate between Singly Linked List and Doubly Linked List data structures.
Q2. If you use C language to implement the heterogeneous linked list, what pointer type will you use and why?
Q3. Is ARP layer 2 or layer 3? Explain.

Round 4 - Fourth Face to Face Interview
This round was the HR round. There was nothing to be worried of. The interviewer was a very nice lady who did not pushed me into the pressure zone. The questions were basic and not vague. There were questions based on my resume. The questions were not twisted and pretty straight forward. The overall interview was really fine.

I was green lit by the HR and was called two days after regarding the offer letter.

How to crack Tellabs Interview


Tellabs has a streamlined hiring process. They don't keep you waiting and they don't keep you anxious. Whatever it is, it will be straight up your face. The interviews begin with a formal introduction with a bit of informal questions just to lighten up the atmosphere.

The second and third interviews are purely technical round. In that, the first one is basic while the second one is a mix up of basic as well as a level higher questions. All they want is to judge how capable you are. The areas to focus will be your preferred programming language, data structures, algorithms and OS based questions.

The last round is the HR round which will interview you about the usual HR questions and questions based on your resume. So be prepared with such questions. The people are good and you will like the environment of the company. All the best for your interviews.


Thanks Anmol for sharing the details of your interview.
Send more details and your personal experiences info@gpuzzles.com
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