I applied through college or university. The process took 1 day. I interviewed at Efftronics Systems (Vijayawāda) in Nov 2018
Interview
I have applied through campus drive...first is a online written test that includes all the sub from 1st year to 4rth . next round is TR 1 which is a basic interview about digital system ,microprocessor, circuits . next round is main round TR2 .
they called after a month early in the morning and given paper consists of 2 questions for 1.5 hrs, after i had given a psychometric test in mean while of test you will have an interaction with the senior employee about test you written earlier (test includes questions related to firmware programming in assembly language is ok ,questions will be explained to you).then i had test related to algorithms and sent us to lunch after 1.5hrs. after lunch we are given with another test related to digital system design noMCU/MPU to be used here also for 1 hr and next i had test related to edc and circuit theory in mean time you will have another interaction with another senior employee about test of digital design .next i had a psychometric test related to questions i had answered earlier in the morning next i had medical check up testing eyes,BP,color blindness,blood and all later all these HR will takes places .
Interview questions [13]
Question 1
design interfacing circuit and alp using any MC or MP for following
three locations loc1,loc2,loc3 are two bit locations having all 00 . but increments one last per second of time which goes to 0 again after next clock starts i.e., is increments till 24*60*60-1 ,we need assume specific time for specific values of loc1,loc2,loc3.and we need to glow the 8 LED's according to hours ,minutes,seconds in binary format and we also need to glow another three LEDs for hour minute and second
three tanks are connected in such a way first tank end to given ti 2nd and seconds to 3rd,we are giving input u and heights of each tank is X,Y,Z respectively from the ground . if the pipe connecting to 2 and 3 is 6(x-y) and pipe connecting through 3rd id 5(y-z) ?
algorithm needed
design a bank locker system.when customer needs to enter need to enter 4 digit pin and in 30seconds banker also to his pin if not then a red lamp has to be glown, if correct pin entered yellow lamp have to glown if customer delays in entering the pin more than 5 seconds then also red lamp has to be glow
water level sensor is segmented into 18 sections and each having a switch that has to be connected to LEDs in long distance with MINIMAL WIRES .when switch closes LED glow and .switch open LED off state
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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