Cerium Systems Dft Design Engineer Interview Questions and Answers

Q1. 1st round with hiring manager.Discussion with hiring manager. Reason for switch. Then technical questions on how to debug and find failure flops in a chain. Basic loc,los, loes lock-up latch questions. Why...read more
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Q2. 3 2 hour interviews were taken( Total 6 hours with 1 people in each round). Questions: how we can reduce test time. how serial chain patterns are solved. How T24 violations are debugged, how we can find wh...read more
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Q3. How compression ratio can be tweaked, what are the factors ( how coverage, Patten count gets impacted).
Ans. 
Compression ratio can be tweaked by adjusting the volume of the combustion chamber. This affects fuel efficiency and power output.
• Compression ratio is the ratio of the volume of the combustion chamber at its largest to its smallest.

• Increasing compression ratio can improve fuel efficiency and power output, but too high a ratio can cause engine knocking.

• Factors that impact compression ratio include the size and shape of ...read more
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Q4. How have I observed hold violations and setup violations in my design. What I did after that, etc
Ans. 
I have observed hold and setup violations in my design and took necessary actions.
• I used static timing analysis (STA) to identify hold and setup violations.

• I fixed hold violations by adding delay cells or increasing clock period.

• I fixed setup violations by reducing delay or decreasing clock period.

• I also checked for false paths and multi-cycle paths.

• I re-ran STA after fixing violations to ensure timing closure.

• I docume...read more
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Q5. Purpose of occ controllers. What scan enable signals( pipelined or nonpiplelined) will go to my occ controller, clock chain and why. Lock up latch purpose. If I have 5 negative edge triggered flops and 5 p...read more
Ans. 
Explanation of purpose of occ controllers, scan enable signals, lock up latch and arrangement of negative and positive edge triggered flops.
• The purpose of occ controllers is to manage the clock signals in a design and ensure proper timing.

• Scan enable signals are used for testing and debugging purposes.

• Pipelined signals are used for faster data transfer while non-pipelined signals are used for simpler designs.

• Lock up la...read more
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Q6. How can we reset a tap controller without trst signals. How do you find coverage gaps.
Ans. 
Resetting a tap controller without trst signals and finding coverage gaps.
• For resetting a tap controller without trst signals, we can use a power-on reset circuit or a watchdog timer.

• To find coverage gaps, we can use code coverage analysis tools like CodeSonar, Coverity, or LDRA.

• We can also use dynamic analysis tools like Valgrind or Purify to find runtime errors and coverage gaps.

• Manual testing and peer code reviews c...read more
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Easy questions were there in round 10 . . . . . . .

Q1. Easy questions. . . . . . . . .
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Q2. Everything from fundamentals.....
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Q1. Questions about Thermal basics. JD also about melting point temperatures
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Q1. Salary negotiations and joining date details
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Q1. What were your previous projects that you have worked on
Ans. 
I have worked on projects related to developing software for autonomous vehicles and implementing machine learning algorithms for predictive maintenance.
• Developed software for autonomous vehicles to improve navigation and obstacle avoidance

• Implemented machine learning algorithms for predictive maintenance in manufacturing plants

• Collaborated with cross-functional teams to integrate new technologies into existing systems
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Q2. What all your technical skills and stacks that you have previously used for your projects
Ans. 
I have experience with Java, Python, SQL, AWS, Docker, and Kubernetes in my previous projects.
• Java

• Python

• SQL

• AWS

• Docker

• Kubernetes
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Q1. What is docker and why do we use it for containerising applications
Ans. 
Docker is a platform for developing, shipping, and running applications in containers.
• Docker allows applications to be isolated in containers, making them portable and easy to deploy across different environments.

• Containers share the host OS kernel but run as isolated processes, providing lightweight and efficient virtualization.

• Docker simplifies the process of packaging applications and their dependencies, ensuring co...read more
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Q2. What is database normalisation and how your project benefited from it in the past
Ans. 
Database normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Database normalization involves breaking down data into smaller, more manageable tables and defining relationships between them.

• It helps in reducing data redundancy, improving data integrity, and making the database more efficient.

• For example, in a project I worked on, we normalized the database by spl...read more
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Q1. What has been your experience with challenging projects
Ans. 
I have extensive experience working on challenging projects in various industries.
• Led a team in developing a complex software solution for a major client

• Managed a project with tight deadlines and limited resources

• Implemented innovative solutions to overcome technical obstacles

• Collaborated with cross-functional teams to deliver successful outcomes
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Q2. How would you approach learning about new domain and technologies with a different background
Ans. 
I would approach learning about new domain and technologies with a different background by leveraging my existing skills, seeking out resources, and collaborating with experts in the field.
• Identify key concepts and terminology in the new domain

• Seek out online courses, tutorials, and books to gain foundational knowledge

• Collaborate with colleagues or mentors who have experience in the new domain

• Experiment with hands-on p...read more
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Questions related to digital and Analog electronics were asked

Simple Python Coding questions.

Q1. Logical questions on Memory allocation.
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Q1. 3-4 rounds of c and DSP questions.
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Q2. Fourier transform
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Q3. Digital filtering
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Q4. C coding and basics
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Q1. Managerial Introduction and alignment with the job role.
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Q1. Technical Hardware Questions
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Q1. Technical Software/Scripting Questions
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Q1. General HR discussions
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