I applied through college or university. I interviewed at Efftronics Systems (Vijayawāda) in Nov 2018
Interview
The interview process is very long,the first round is written test which includes two parts,part 1 covers quant apti,logical reasoning and technical subjects and part 2 covers IQ.Short listed students for 2nd round will be announced,The 2nd round is a technical interview (TR1) in which one will asked about all the subjects learned in btect life.The shortlisted students will be called to their office in Vijayawada after few weeks.They took a full day to finish the interview process in Vijayawada.As soon as you reach there they conduct psychological (it includes psychological,IQ test and interview) and medical tests (includes BP test,color blindness, eyesight,etc),later they conduct written exams on 4 papers namely MPMC programming, Digital electronics,Circuit Analysis (includes EDC), algorithms and for exam a technical interview (TR2) is conducted in which we have to explain our answers written in the exam.Later the list of selected students will be announced after which there will be a general talk with HR about the company rules and regulations,bond duration and salary
Interview questions [4]
Question 1
Find out the frequency of a input square wave and if it falls below 1khz glow an led light,use any mp or mc of your choice
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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