I applied through college or university. The process took 3 weeks. I interviewed at Efftronics Systems (Vijayawāda) in Feb 2021
Interview
This company Interview is time consuming process and they want to access each and every detail of us. The interviewer will try to demotivate you but you have to stand on your answer and try to explain why your answer is correct to your extend.
Interview questions [1]
Question 1
Write a assembly language program to generate 1kHz square wave on port 1 of 8051 microcontroller.
I applied through college or university. I interviewed at Efftronics Systems (Mangalagiri) in Mar 2026
Interview
there are 3 exams, 1) maths,2)digital electronics,3)embedded c programming questions. Prime numbers and square wave generator in microcontrollers. AND THEN INTERVIEW BASED ON THE ANSWERS WRITTEN BY US in the exam and few questions like what is flip flop , difference between sequential and combinational circuits
Interview questions [1]
Question 1
embedded c coding question, program counter, flip flop, relay circuit, instruction length,
3 rounds
1. Started of with the psychometric test(basix questions).
2 . 2 questions on digital electronics system design (1 hour)
3. 2 questions on controller programming (c or assembly based on your choice] {1hour]
Interview questions [1]
Question 1
1. prime number
2. generate a square wave of 50 Hz
I applied through college or university. The process took 2 weeks. I interviewed at Efftronics Systems (Vijayawāda) in May 2025
Interview
Written test Technical 1 interview Technical 2 interview Hr interview Whole day in the office food is provided questions are about the role based upon the answers u have written the interview will be
Firmware Engineer applicants have rated the interview process at Efftronics Systems with 3.7 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 67% positive. To compare, the company-average is 53.9% positive. This is according to Glassdoor user ratings.
Candidates applying for Firmware Engineer roles take an average of 5 days to get hired, when considering 3 user submitted interviews for this role. To compare, the hiring process at Efftronics Systems overall takes an average of 9 days.
Common stages of the interview process at Efftronics Systems as a Firmware Engineer according to 3 Glassdoor interviews include:
One on one interview: 100%
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