Silicon Labs Assistant Design Engineer Interview Questions and Answers

Round: Test
Experience: Questions were from Digital Electronics,Microprocessors and some from CMOS.
50% Digital Electronics.
1 X Output waveform drawing from circuit of FFs & gates
1 X Realize inverter from given two blocks
1 X CMOS implementation of gates
1 X Realize digital circuit for given waveform
1 X MIPS & Pipelining
1 X Processors power Dissipation calculation
1 X Small Signal analysis of CMOS
1 X Compare two given buffers circuits(CMOS)
1 X Transfer function calculation(Control Theory)
1 X Counter using JK FF
1 X Sequence Detector

Tips: Study digital electronics very well.

Duration: 1 hr 45 min minute
Total Questions: 12

Round: Technical Interview
Experience: Indroduction
Projects & Internship
Discussions in DEPTH on:
Pipelining
STA
MIPS
Memory(flash memory,DRAM,SRAM)
CACHE Memory
DMA
Digital circuit realization for given waveform
XOR Gate using 2:1 MUX
Tips: Prepare Digital electronics and Microprocessors very well.Sta is very important.Panel will go deep into the topics to check ur technical knowledge.
TIPS: Be confident and your opinion should be strong.Stand by what you say.Do not get confused.And when panel asks to solve any digital circuits, speak loud what is in your mind and what approach you are using.Be honest.

Round: HR Interview
Experience: Family Background
Why Freescale


Skills: Static Timing Analysis (STA), Memory, CMOS Circuits, Microprocessor, Digital Circuits
College Name: BIT Mesra
Motivation: I had interest in core electronics

Round: Technical Interview
Experience: I was unable to solve the problem properly but after that he gave me a normal k map to solve.

Round: Technical Interview
Experience: Asked about inverter and delay dependency on temperature and other parameters

Round: Technical Interview
Experience: I managed to answer most of the answer that i did wrong since i had discussed it with my friends after coming from college.

Round: HR Interview
Experience: provided answers that relates company requirements

Round: HR Interview
Experience: Listened carefully about their job description and work environment

College Name: IIT Madras

Round: Test
Experience: A written test with Core - Essay Type Questions.
Tips: Revise previous core VLSI courses (Digital Circuits, Digital IC Design, Analog Circuits, and Solid State Devices).
Duration: 60 minutes

Round: Interview
Experience: 3 rounds of interviews (15-20 minutes each)Basic digital concepts, ability to analyze a given circuit
Tips: Be thorough with your basic electronics conceptsPerformance in the technical interview counts a lotAnalog devices didn't need any particular course or project, they mainly look for strong basics in digital/analog circuit theory, and ability to analyzeRevise all of your core courses, starting from the basics

Round: Interview
Experience: For the HR round, questions about your background, family, interests etc. are asked

General Tips: Learn to keep cool, even under stress, and have confidence on your knowledge
College Name: IIT Madras

Round: Test
Duration: 60 minutes

Round: HR Interview
Experience: No prep required for HR round, asked few personal questions (about your background, family, interests etc.)

General Tips: Revise all of your core courses, starting from the basics. Junta usually stumble when asked questions from basic fundaes.
I felt a lot of stress before my first interview, which affected my performance badly. Learn to keep cool, and have confidence on your knowledge.
Skill Tips: You should have ability to analyse a given circuit
Skills: Digital electronics basics,
College Name: IIT MADRAS

Round: Test
Experience: The selection procedure is a test followed by tech interview and an HR interview.
The test had two parts:
 Aptitude (common across all profiles)
 A tech. test (separate for each profile)

Round: Interview
Experience: The tech interview was the important one and the HR interview was just about knowing the student and vice-versa. The tech interview was more concentrated on the basics and more importance was given to the approach of solving the problem rather than solving the problem itself.
No CGPA cutoff.

Round: Interview
Experience: Not very important.

General Tips: The work is well structured and executed. There is a lot of opportunity for more technical learning. Interns are also included into the teams and this helps the intern on knowing about the things going around them and gets an overall view of how things work.
As a whole, the work is very good, and exceeds all the expectations of the students.
College Name: IIT Madras

Round: Test
Experience: Test was subjective and questions were asked from basic analog, digital design, VHDL and VLSI circuits.

Round: Technical Interview
Experience: Had 3 technical interviews each around 25 minutes. They asked me about my summer internship and
questions from microcontroller architecture and its interfacing. Then they asked me the questions
from those problems which I didn't attempt in the written test.
Tips: For electrical students, it might be a bit challenging. I took an elective on Microcontroller in 7th sem which
helped me a lot during the interview. You might want to brush up your concepts of 8085, digital, OPAMPs
and analog

Round: HR Interview
Experience: My family background and my future goals were asked. They asked me about
my internship project and wanted to know what I learnt during the internship. Then I asked a few questions
from them about the company work culture and growth opportunities

College Name: IIT Roorkee

Round: Test
Total Questions: 15

Round: Technical Interview
Experience: Panel discussed questions attempted incorrectly or not attempted. Topics asked separately: RAM, MOSFET, Memory, Interrupts, FIFO etc.Few puzzles were also asked.

General Tips: Topics that should be covered: Digital Electronics, Microprocessors, Basic Electronics, K Map and FSM questions.
Skills:
College Name: BIT MESRA

Round: Resume Shortlist
Experience: Resume is not given any due importance in selection for further rounds . But honesty is very important as it counts once you are selected for HR round .
Tips: Try to be one hundred percent honest . And put your projects and course work in the beginning. They don't care your POR s and extra curricular activities.

Round: Test
Experience: Hardware - Questions are mainly from ELECTRICAL CIRCUITS (RLC ckts) , Analog ckts. Amplifiers , Opamps , digital system design . Aptitude section is very easy . Hardware section is tough .I felt Signal processing was easier , indeed I got selected for that profile .
Tips: Prepare thoroughly these courses :- EMC , DIGITAL SYSTEMS, NETWORKS AND SYSTEMS,ANALOG & DIGITAL SIGNAL PROCESSING , ANALOG CKTS COURSES .THAT SHOULD BE ENOUGH .
Duration: 90 - Signal Processing minutes
Total Questions: 120 - Hardware and aptitude

Round: Group Discussion
Experience: No
Tips: No

Duration: 2
College Name: IIT Madras