Carl Zeiss Design Engineer Interview Questions and Answers

Q1. Introduction about ourselves
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Q1. Personal interview ( personality test )
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Q1. STA , setup and hold?
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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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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. Explain functional and code coverage.
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Functional coverage ensures all functions are tested, while code coverage ensures all lines of code are executed.
• Functional coverage focuses on testing the functionality of the design.

• Code coverage ensures that all lines of code are executed during testing.

• Functional coverage helps in identifying missing or incomplete functionality.

• Code coverage helps in identifying untested code paths.

• Example: Functional coverage may ...read more
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Q1. Questions on AHB protocol.
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Q1. Digital design based questions.
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