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Nvidia DFT Engineer Interview Questions and Answers

Updated 13 Jan 2023

Nvidia DFT Engineer Interview Experiences

1 interview found

DFT Engineer Interview Questions & Answers

user image Anonymous

posted on 29 Nov 2022

I applied via LinkedIn and was interviewed in Jul 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist 
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Round 2 - Technical 

(6 Questions)

  • Q1. Total 5 rounds were taken. 1 + 4 hours (back to back rounds). Questions were based on edt configuration and how changing it wil affect my design in terms of coverage and pattern count. How we can debug ser...
  • Ans. 

    Edt configuration: Having more chains will cause less pattern compaction. IF you want to get data for a particular chain u have to send more patterns (Imagine at compressor you want to get data you have to mask all the other chains in the xor gate) hence more patterns needed. If we have single scan cell in a chain then less fault will be covered (only 2 patterns 1 and 0 can be sent). If high number of scan cells are th...

  • Answered Anonymously
  • Q2. Atspeed clock mechanisms. Questions on fault types. Circuit was drawn and I was asked to cover maximum faults for minimum number of patterns (3,5 i/p xor gate was drawn and how I can get s@ 1 s@0 faults fo...
  • Q3. Can hold time/setup violation occur at stuckat capture.
  • Ans. 

    Yes, hold time/setup violation can occur at stuckat capture.

    • Stuck-at faults can cause hold time violations if the data is not held long enough for the capture register to sample it.

    • Similarly, setup violations can occur if the data is not stable before the capture register samples it.

    • These violations can be avoided by proper timing constraints and clocking strategies.

    • For example, adding a delay to the clock signal can e...

  • Answered by AI
  • Q4. Why can there be any coverage loss for 100% scan design.
  • Ans. 

    Coverage loss can occur due to test pattern compression, test pattern generation, and test application issues.

    • Test pattern compression can cause loss of coverage due to the reduction in the number of test patterns.

    • Test pattern generation can result in coverage loss if the generated patterns do not cover all the faults.

    • Test application issues such as timing violations or signal integrity problems can also lead to covera...

  • Answered by AI
  • Q5. Questions on issues faced during ATPG, GLS coverage analysis.
  • Q6. Difference between T3 and T5 violation.
  • Ans. 

    T3 and T5 violations are related to timing constraints in digital circuits.

    • T3 violation occurs when the data arrives too late at the destination register.

    • T5 violation occurs when the data arrives too early at the destination register.

    • T3 and T5 violations can cause setup and hold time violations.

    • T3 and T5 violations can be fixed by adjusting the timing constraints or by adding delay elements.

    • Examples of T3 and T5 violat...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Read basics thoroughly and try to understand why the architecture is like this. For example they will ask the purpose of OR and AND gates or flipflops in loes. Be clear on what you have done in your current company and what and how the problems you faced were solved.

DFT Engineer Jobs at Nvidia

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Interview questions from similar companies

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I was interviewed in Aug 2024.

Round 1 - Aptitude Test 

Code-with-cisco having coding questions and mcq

Round 2 - Technical 

(2 Questions)

  • Q1. Different scheduling algorithms in OS?
  • Ans. 

    Different scheduling algorithms in OS determine how tasks are prioritized and executed.

    • First-Come, First-Served (FCFS)

    • Shortest Job Next (SJN)

    • Round Robin (RR)

    • Priority Scheduling

    • Multi-Level Queue Scheduling

  • Answered by AI
  • Q2. Resume go-through: projects and intern
Round 3 - Technical 

(2 Questions)

  • Q1. Networking: Transfer packet from one device to another
  • Q2. Contact dictionary- data structure used and time complexity
  • Ans. 

    Contact dictionary can be implemented using hash table for fast lookups with O(1) time complexity.

    • Use a hash table to store contacts with keys as names and values as contact information.

    • Example: { 'John Doe': '555-1234', 'Jane Smith': '555-5678' }

    • Time complexity for searching, inserting, and deleting contacts is O(1) with a hash table.

  • Answered by AI
Round 4 - HR 

(2 Questions)

  • Q1. Basic networking
  • Q2. Why cisco, what is cisco?
  • Ans. 

    Cisco is a multinational technology conglomerate known for networking hardware, software, and services.

    • Cisco is a leading provider of networking equipment and solutions.

    • They offer a wide range of products including routers, switches, and security devices.

    • Cisco also provides software solutions for network management and security.

    • The company offers services such as consulting, technical support, and training.

    • Cisco is kno...

  • Answered by AI

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(1 Question)

  • Q1. Toughest time and how you handled
  • Ans. 

    Dealing with a project deadline delay due to unexpected technical challenges

    • Identified root cause of the technical challenges

    • Collaborated with team members to brainstorm solutions

    • Adjusted project timeline and communicated with stakeholders

    • Worked extra hours to meet the revised deadline

  • Answered by AI
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed before Mar 2023. There was 1 interview round.

Round 1 - Coding Test 

Python and java related question

Interview Preparation Tips

Interview preparation tips for other job seekers - Overall good expierence

Nvidia Interview FAQs

How many rounds are there in Nvidia DFT Engineer interview?
Nvidia interview process usually has 2 rounds. The most common rounds in the Nvidia interview process are Resume Shortlist and Technical.
How to prepare for Nvidia DFT Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Nvidia. The most common topics and skills that interviewers at Nvidia expect are DFT, Semiconductor, Coding, Simulation and Analytical.
What are the top questions asked in Nvidia DFT Engineer interview?

Some of the top questions asked at the Nvidia DFT Engineer interview -

  1. Why can there be any coverage loss for 100% scan desi...read more
  2. Can hold time/setup violation occur at stuckat captu...read more
  3. Difference between T3 and T5 violati...read more

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Nvidia DFT Engineer Salary
based on 7 salaries
₹15 L/yr - ₹35 L/yr
170% more than the average DFT Engineer Salary in India
View more details
DFT Engineer - Hardware

Bangalore / Bengaluru

0-4 Yrs

Not Disclosed

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