Elmex Controls Design Engineer Interview Questions and Answers

Q1. Introduction about ourselves
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Q1. Personal interview ( personality test )
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Q1. Tell me about yourself
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Q2. Questions based on experience and projects
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Q1. Electronic related questions were asked PCB related
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Basic aptitude questions

Q1. Tech questions related to domain
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Q1. Genenral questions that are non technical
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Code for constraints
Code for driver

Questions covering various aspects

Q1. Design a mood 3 counter
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A mood 3 counter is a device that tracks and displays the user's mood on a scale of 1-3.
• Design a simple interface with 3 buttons for the user to input their mood (happy, neutral, sad)

• Include a display screen to show the current mood level

• Implement a reset button to clear the mood counter

• Consider adding a visual indicator such as colored LEDs for each mood level
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Q2. What are the three states
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The three states refer to the three fundamental states of matter: solid, liquid, and gas.
• Solid: particles are closely packed together and have a fixed shape and volume (e.g. ice)

• Liquid: particles are close together but can move past each other, taking the shape of their container (e.g. water)

• Gas: particles are far apart and move freely, filling the entire space of their container (e.g. air)
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Q1. IV characterstics of CMOS inverter
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IV characteristics of CMOS inverter show the relationship between input voltage and output current.
• CMOS inverter has two transistors - NMOS and PMOS connected in series.

• For low input voltage, NMOS is ON and PMOS is OFF, resulting in low output voltage.

• For high input voltage, NMOS is OFF and PMOS is ON, resulting in high output voltage.

• The transition between low and high output voltage occurs at the threshold voltage.

• Th...read more
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Q2. Set up and hold time explain
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Set up time and hold time are timing requirements in digital circuits to ensure proper operation.
• Set up time is the minimum time before the clock edge that the input signal must be stable.

• Hold time is the minimum time after the clock edge that the input signal must be maintained stable.

• Violating set up time can lead to incorrect data being latched.

• Violating hold time can lead to metastability issues.

• Examples: In a flip...read more
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