Tejas Networks Interview Experience 2023

Tejas Networks conducted a visit to our college on August 27, 2023. My background is in Electronics and Communication Engineering (ECE), and I applied for a software role.

The eligibility criterion was a minimum CGPA of 7.5 throughout the academic years, specifically for ECE students. A total of 72 students were shortlisted for the online test, with 38 from the hardware track and 34 from the software track. The position in consideration was “Engineer, R&D” located in Bangalore.

In Round 1 (Online Test):-

It commenced on September 6th, the exam duration was 2 hours. The test comprised two sections. The first section mainly encompassed aptitude questions and a few from operating systems, object-oriented programming (OOPs), and networks.

The second section involved three coding questions:

1. Construct an almost complete binary tree using a list of integers, A, of size N, and write a program to calculate and print the sum of the first numbers from each level (Easy).
2. Given an incomplete integer series str, of n elements, where each element is the sum of the previous two elements and only two elements in the series are provided, fill in the rest (Hard).
   Sample input: 10, _, _, _, _, 15
   Sample output: 10, -3, 7, 4, 11, 15
3. Implement a solution for connecting N ropes with minimum cost (Medium) [source: https://www.geeksforgeeks.org/connect-n-ropes-minimum-cost/].

Tip:- A crucial tip was to prioritize the coding round due to its higher weightage and aim to successfully solve at least two problems. Five students were selected for the software role, while three were selected for the hardware role.

In Round 2 (Technical Interview) held on September 21, the interviewer initiated the discussion with my resume and projects. I presented my project on VoIP implementation using Cisco Packet Tracer, which led to questions about network-related details like port capacity of routers and switches used in the project, and the number of electric and optical ports.

The interview then transitioned to the coding part with the following questions:

1. Rotate a matrix 270 degrees anticlockwise.[Source:-https://www.geeksforgeeks.org/rotate-a-matrix-by-90-degree-in-clockwise-direction-without-using-any-extra-space/]
2. Implement a queue using two stacks. Subsequently, he challenged me to optimize it using only one stack. I successfully solved both problems.[source:-https://www.geeksforgeeks.org/problems/queue-using-two-stacks/1]

Following this, the interviewer delved into Object-Oriented Programming (OOPs) concepts, covering differences between shallow copy and deep copy, as well as virtual functions and pure virtual functions. Additionally, questions regarding Operating Systems were posed, focusing on the distinctions between user-level threads and kernel-level threads.

Out of the candidates interviewed, 4 students were selected for the software role, and 1 for the hardware role.

In Round 3 (HR Interview) on October 2nd, the call primarily served as a formality round. The interviewer discussed my preference for the Bangalore location and confirmed my agreement. We also discussed the offered compensation. Ultimately, all five students were selected for the positions.

ALL THE BEST!!!!