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Graduate hardware engineer Interview Questions

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There are 5 holes in a line, and there is a rat in one of it. Each turn the rat will move either left or right, but never stay in the same hole, and each turn you can check one hole. The holes are in a line so when the rat reach one end, it must move back in the next turn. What is your strategy to catch that rat?

3 Answers

start with middle move to 2nd and check twice and move to 3rd and then 4th and check 4th twice.. right? OR you start anywhere just move sequentially and check 2nd and 4th place twice

middle to 2nd not needed

Keep checking middle one, worst case delay is 4 check, and you should find it by then!!

Basic to advanced digital questions. Started with Flip flop - latches, memory, pipeline, FSM, writing a c program, timing analysis.

2 Answers

Q: How to check if an 80-character long string is parenthesis balanced?

1 Answer

The question mostly related to your relevant experience as well as the skill required for the role.

1 Answer

Q: How to multiply a number by 2? by 7? by 14?

1 Answer

Q: How to implement a 3-bit LFSR and build your output logic with it? If there is some brief state '111' that only lasts a really short time, what is the most possible reason it would be? When is it most likely to happen? How to amend this circuit?

1 Answer

What is the maximum and minimum value of an eight-bit 2's complement signed signal? Can you draw a D gate circuit?

1 Answer

Two questions regarding MOSFETs, 1. The first question was to identify a MOSFET circuit, 2. The Second was to explain the difference between the parameters of two of the MOSFET devices in the circuit. 3. The third question was to write down sample code for a scenario.

1 Answer

Digital questions

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Q: With a flip-flop coming after an 8-bit multiplier to save the result, what is the requirement for the time delay of this multiplier? If the multiplier did not meet the requirement, what kind of violation it should be?

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