Efftronics Systems Embedded Firmware Engineer Interview Questions and Answers

Components involved in the internal logic circuit of a 7-segment display include decoder, driver, and individual LED segments.

• Decoder: Converts input signals into the appropriate output signals for each segment.

• Driver: Amplifies the output signals from the decoder to drive the LED segments.

• Individual LED segments: Represent each of the seven segments in the display.

• Example: BCD to 7-segment decoder, transistor driver circuit, LED segments.

The trains will meet at a point that is determined by the relative speeds of the trains.

• The point where the trains meet is determined by the sum of the distances traveled by each train.

• The time taken for the trains to meet is determined by the relative speeds of the trains.

• If Train A is traveling at 50 mph and Train B is traveling at 70 mph, they will meet at a point that is closer to Train B's starting point.

Design a vending machine using a microcontroller with two 7-segment displays and additional operational conditions.

• Use a microcontroller to control the vending machine's operations

• Incorporate two 7-segment displays to show the amounts

• Include four to five additional operational conditions such as low inventory alert, coin validation, product selection, etc.

Assembly language program to reverse a byte for a hexadecimal value.

• Load the hexadecimal value into a register

• Extract the lower 4 bits and upper 4 bits of the byte

• Swap the lower and upper 4 bits

• Combine the swapped bits to get the reversed byte

Assembly language program to display square waves for 1 Hz and 2 Hz using 2 ports.

• Use assembly language instructions to control the ports for outputting square waves.

• Set up a loop to toggle the ports at the desired frequencies to generate the square waves.

• Ensure proper timing and synchronization between the two square waves.

Life is a journey filled with experiences, challenges, growth, and opportunities for self-discovery.

• Life is a precious gift that should be cherished and lived to the fullest

• It involves constant learning, adapting, and evolving as individuals

• Life is about forming meaningful relationships and connections with others

• It includes pursuing passions, setting goals, and overcoming obstacles

• Life is a balance of joy and sorrow, success and failure, love and loss

Education can help individuals earn money by providing them with valuable skills, knowledge, and opportunities for career advancement.

• Education can lead to higher paying job opportunities

• Specialized education or training can result in higher salaries

• Education can also lead to promotions and career advancement

• Higher levels of education are often correlated with higher earning potential

Hexadecimal to decimal conversion involves multiplying each digit by 16 raised to the power of its position.

• Start from the rightmost digit and multiply each digit by 16 raised to the power of its position (0-indexed).

• Add the results of each multiplication to get the decimal equivalent.

• For example, converting 0x1A to decimal: (1 * 16^1) + (10 * 16^0) = 26.