DFT Engineer Interview Questions
What techniques do you use to reduce pattern count without losing coverage?
Interviewers typically ask this role-specific question to gauge how you might react in a similar scenario at work. This question may also help them gauge your knowledge on the subject and your level of skill. When answering this question, provide a brief explanation of the process you use.
Example: “Different ATPG tools offer different compression and pattern ordering techniques to help reduce pattern count. The first step is chain balancing during Stitching or scan insertion. If I balance my chains, Tool needs to insert fewer dummy patterns for reaching a required flop. I can also include compression on the chains where there are constraints on the pins of the device. This means if I have a compression factor of two, then my one scan chain divides into two inside the device. This reduces the chain length.”
In-depth questions
In-depth questions related directly to the role for which youre interviewing. Interviewers typically ask these complex questions to test your extensive knowledge about DFT-related tasks and scenarios. Questions may include scenario-based questions or require you to recite specific concepts and actions. Heres a list of sample in-depth questions:
General DFT interview questions
Interviewers usually ask general questions to learn about your work ethic and your personality. These questions may also help the interviewer evaluate whether youd fit into the company work culture. Consider these general questions while preparing for your DFT interview:
Interviews for Top Jobs at NVIDIA
DFT Engineer Interview
I applied online. The process took 1 week. I interviewed at NVIDIA (San Jose, CA)
Interview
Started with telephonic discussion. After telephonic interview tool 3-4 days to get one-on-one interview call. There were 4 interview rounds. Most questions were based onDFT concepts. Few aptitude questions were asked. Difficulty level of interview question was medium. Make sure you referesh all the DFT concepts before interview
DFT Engineer Interview
I applied online. I interviewed at NVIDIA in Oct 2020
Interview
three-question one logical and two bout logic circuits.at the start, they introduce the company and then they talked about the position itself. after that I talked about myself and in the end, they asked me the questions.the interview took about 2-hours from the start to the end.
- you got a part which receives two numbers and has two outputs, max of the two numbers and the min of the two numbers. create from that part a circuit which sort 4 numbers from smallest to largest
How to prepare for the Verilog Interviews?
The trainee who really wants to clear Verilog interviews needs to have the following skill-sets:
Verilog HDL trained in RTL & Test bench.
What is expected from the Verilog Interviews?
The interviewer checks your RTL coding skills, Simulation debugging skills.
They also expect you to write synthesizable code and be aware of the design implementation process i.e. from RTL design to Netlist for front end design and from RTL design to .bit file generation for FPGA design.
Here we provide some useful Verilog interview questions and answers which will help you with the preparation for Verilog interviews from an industry perspective.
9) What do you mean by clock skew? 10) Is Hold time dependent on clock frequency? 11) Is clock skew an advantage or not? 12) Current technology node used in industry? 13) Is set up time-dependent on clock frequency? 14) Why do you need a reset in flip flop? 15) What is the multicycle path? 16) Any tools for DFT?
FAQ
What is scan insertion in DFT?
- Physical Design.
- Design for testability (DFT)
- Custom/Analog layout.
- Physical verification.
- FPGA system design.
- Embedded systems.
What is DFT VLSI?
