Molex CAD Design Engineer Interview Questions and Answers

Q1. Basic of electronics systems
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Q1. Basic of digital electronics
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C, c++ python and simple aptitude

Q1. MOSFET working & types
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Q2. CMOS inverter and it's working
Ans. 
A CMOS inverter is a type of digital logic gate that switches between high and low voltage levels.
• CMOS stands for Complementary Metal-Oxide-Semiconductor

• It consists of a PMOS (p-type metal-oxide-semiconductor) and NMOS (n-type metal-oxide-semiconductor) transistor connected in series

• When the input is high, the PMOS transistor conducts and the output is low

• When the input is low, the NMOS transistor conducts and the outp...read more
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Q1. Behavioral question & hr question
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Q2. Hr discussion & salary discussion
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Q1. STA , setup and hold?
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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. Write a c program on fibbonacci series
Ans. 
A C program to generate Fibonacci series
• Declare variables to store current and previous Fibonacci numbers

• Use a loop to calculate and print Fibonacci numbers

• Handle edge cases like 0 and 1 separately
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Q2. Design a up counter circuit
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A up counter circuit is a digital circuit that counts upwards in binary sequence.
• Use flip-flops to store the count value

• Connect the output of one flip-flop to the clock input of the next flip-flop

• Use logic gates to control the counting sequence

• Add a reset input to clear the count when needed
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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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Questions covering various aspects

Q1. Design a mood 3 counter
Ans. 
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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