Design Digital Interview Questions

820 design digital interview questions shared by candidates

Technical Questions: Questions about Latch vs Flip-Flop. Draw a D-flip-Flop, linked them together to make a linear feedback shift register. Draw timing diagram. (Setup/Hold time). Draw complementary style inventor. (Pmos,Nmos). Why Pmos is on the top? talked about low power design principle. Problem solving: A problem about "Three boxes are labeled “Apples,” “Oranges,” and “Apples and Oranges.”". Google it. Write a program to find a parenthesis in a string. Ex: A(+SDF09)(u&(.
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Digital ASIC Design Graduate

Interviewed at Imagination Technologies

2.9
Mar 29, 2016

Technical Questions: Questions about Latch vs Flip-Flop. Draw a D-flip-Flop, linked them together to make a linear feedback shift register. Draw timing diagram. (Setup/Hold time). Draw complementary style inventor. (Pmos,Nmos). Why Pmos is on the top? talked about low power design principle. Problem solving: A problem about "Three boxes are labeled “Apples,” “Oranges,” and “Apples and Oranges.”". Google it. Write a program to find a parenthesis in a string. Ex: A(+SDF09)(u&(.

1st two interviewers : Volatile v/s Non Volatile memory (RAM/ROM) Basic Verilog questions like blocking v/s non-blocking, continuous vs procedural etc Explanation of all my FPGA/Verilog-related projects 2:1 MUX using basic gates Setup vs Hold, which is more important, why is it caused. metastability - how to fix it FIFO uses ASIC design flow How does synthesis happen Synchronisation vs Asynchronous clock 3rd Interviewer: Equation for power in a resistor Analysis of parallel LC circuit 2 i/p AND gate where each input is getting pwm of period 10. But on input B, an inverter of 1ms delay is attached. What's the resulting waveform? Is it practical to be used with a f/f Transfer characteristic of NOT gate Can NOT gate be used as an amplifier
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Digital Design Engineer

Interviewed at Microchip Technology

3.6
Jan 17, 2023

1st two interviewers : Volatile v/s Non Volatile memory (RAM/ROM) Basic Verilog questions like blocking v/s non-blocking, continuous vs procedural etc Explanation of all my FPGA/Verilog-related projects 2:1 MUX using basic gates Setup vs Hold, which is more important, why is it caused. metastability - how to fix it FIFO uses ASIC design flow How does synthesis happen Synchronisation vs Asynchronous clock 3rd Interviewer: Equation for power in a resistor Analysis of parallel LC circuit 2 i/p AND gate where each input is getting pwm of period 10. But on input B, an inverter of 1ms delay is attached. What's the resulting waveform? Is it practical to be used with a f/f Transfer characteristic of NOT gate Can NOT gate be used as an amplifier

1. Frequency divider circuits. 2. JK flip flop truth table and circuit gate based implementation. 3. Sequence detector using FSM for 00100 overlapping. 4. Usage of clock in sequential circuits. 5. setup and hold time. 6. How do you express frequency in terms of setup and hold times. 7. 1 aptitude question. (only this question not answered properly)
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Digital Design Engineer

Interviewed at Qualcomm

3.8
Mar 22, 2021

1. Frequency divider circuits. 2. JK flip flop truth table and circuit gate based implementation. 3. Sequence detector using FSM for 00100 overlapping. 4. Usage of clock in sequential circuits. 5. setup and hold time. 6. How do you express frequency in terms of setup and hold times. 7. 1 aptitude question. (only this question not answered properly)

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