LG Electronics Vlsi Engineer Interview Questions and Answers

Q1. Write monitor for APB protocol
Ans. 
A monitor for APB protocol is a verification component that checks for protocol compliance in APB transactions.
• Monitor should check for valid address, data, and control signals in APB transactions

• It should detect and report any protocol violations or errors

• Monitor should be able to track the state of the APB bus and ensure proper communication between master and slave devices
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Q2. Design FSM - halway with 2 detectors, accuire amout of pepole in room - only one person can pass halway each time.
Ans. 
Design a finite state machine to count the number of people passing through a hallway with 2 detectors, allowing only one person at a time.
• Create states for each detector and the hallway

• Transition between states based on detector inputs

• Use counters to keep track of the number of people passing through

• Implement logic to prevent multiple people from passing simultaneously
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There were mostly embedded c programming questions, like what will be the output of the given code, what is the error that will occur if this program runs, etc. Lasted about 30 minutes.

Q1. Questions were on communications protocols like I2C, UART, SPI, etc. Working and block diagram of project, operating modes of a transistor.
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Q1. Implement random()
Ans. 
Implement random() function.
• Use a pseudorandom number generator algorithm to generate random numbers.

• Seed the generator with a unique value to ensure different sequences of random numbers.

• Consider the range of numbers required and scale the generated numbers accordingly.

• Ensure the generated numbers have a uniform distribution.

• Test the implementation for randomness and statistical properties.
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Q1. I don't remember
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Q1. Where do you see your self in 5 years? why WDC? what will you do if a colleague needs your help and you have a lot on your plate?
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Q1. Asked for recommendations from prev. managers.
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