Interview Experience – Qualcomm (On Campus)

This is an interview experience of Qualcomm, an American multinational semiconductor and telecommunications equipment company. This is an on campus placement experience and has been share by Mr. Anuj Kumar (BITS Pilani).


Hey guys… I appeared for Qualcomm Interview from Bits-Pilani, Pilani campus. It was 2 day process which included:

  • Day 1) Written test(all MCQs)
  • Day 2) Tech round1, Tech round 2, Hr interview



Written Test

Written test included 3 sections: Aptitude (was easy, you just need to manage time: around 30 Q to be done in 30 min), Basic Programming with C (brush up all c basics, syntax, functions etc), Technical questions (Electronics: majorly electronic devices, analog, digital, network theory, uP).


Suggested Books from VLSIFacts:

Aptitude: Quantitative Aptitude For Competitive Examinations

Basic Programming with C: Let Us C

Electronics

Analog: Integrated electronics: Analog and Digital Circuit Systems

Digital: Digital Fundamentals

Network Theory: Fundamentals of Electric Circuits

Microprocessors: Microprocessor Architecture, Programming, and Applications with the 8085

Verilog: Verilog HDL


Technical Round 1

Technical round 1 went around 40-45 min.

  1. Tell me about the recent project you did and what did you do?
  2. Suppose you are a teacher and i am your student, teach me op-amps as i did a project on that.
  3. Asked me various digital design question: FF, mealy/moore, verilog, mux, etc.

Technical Round 2

Technical round 2 went around 30 min.

  1. Asked various questions from Verilog coding, the area i was interested in and was applying for.
  2. What is multi-cycle path?
  3. What is false path?
  4. Projects from resume and how did i analyze the results

HR Round

This was the final round and went around 15 min.

  1. What was your most challenging project, how did you accomplish it?
  2. What did your mentor say about you?
  3. Why Qualcomm?
  4. Any project you did in a group, what was your role in that and how far you achieved that project?
  5. Are you ready to relocate?
  6. Any Questions for me??

That was it…Finally I was in… 😀 🙂


You might like to go through Qualcomm Interview Question Banks


ADVICE

  • Focus on your Resume, be clear with what you have written and be thorough with the projects you have mentioned in it.
  • Should have two things always whenever appearing for any interview: Self Confidence and a SMILE…

Thanks… ENJOYYY 😀

Telephonic Interview Experience – STMicroelectronics

Hey Everyone. This is my telephonic interview experience at STMicroelectronics for the position of an intern. I received a called from STM in the morning. I greeted the interviewer with a good morning and the interview started with asking about me. Then he asked me about what I had done in my four years of B.Tech apart from the regular curriculum.

I told him about me being the robotics coordinator of my college, about the competitions I had participated in and then about my trainings and intership. He asked me about my training at Mentor Graphics.

I told him about the training, and that I had learnt about Verilog and System Verilog there. I also told him that the main focus of the program was verification of designs but it included designing as well. He seemed to be happy and a little more excited after this.

He then asked me about my academic projects. I told him about my projects and that one of my projects included work done on a Cadence tool: Virtuoso. He asked me about the simulator used in Virtuoso. I got a little nervous as I didn’t know that. The answer was Spectre Circuit simulator. He comforted me a bit and then asked me about what all I had learnt from my project and how do I think it would help me.

He then asked to define pi. I told him that the ratio of circumference of any circle to its diameter would define pi. He seemed to be very happy about this answer and he told me that this was the correct answer. He then asked me to define mass in a similar way. He asked me whether “1” is composite or prime.

He then made me draw an inverter with the pmos and nmos swapped and asked me what difference it would make to the output. I told him the answer and how there would not be pure zero and pure one transmission in this case. He then asked me what would be the region of maximum current in an inverter. I answered correctly. He seemed to be very happy after this. Then he asked me some other questions on CMOS.

He then told me about the profile they were recruiting for and if I would be able to take up the challenge. I replied in positive. By then I was pretty sure I would get through the interview. Then I greeted him thank you and the interview was over. The results came out in a few days and the result was positive.

I would recommend students opting for this to be strong with the basics of VLSI and CMOS. Be confident and perform well. The results would always be in your favor. Thank you and All the Best. 🙂

Dewansh Aditya Gupta

Interview Experience – Texas Instruments (Off Campus)

This is my interview experience with Texas Instruments India. I was searching for job in circuit design field and what could be a better opportunity than TI.

I applied to TI on their career site (as most of us do), but apparently received NO response. Then I started connecting to people who are working in TI and started talking to them.

Finally I got connected to a HR person. She shortlisted my resume and got me connected to their hiring partner Careernet for online test. They scheduled an online test on that day itself.

Online Written Test

There were 7 questions in the test and 10 minutes was given. I was able to solve 6 of them (5 of them correct, I guess). The questions were related to op-amp, RC network and basic CMOS. I remember one question was on frequency response of op-amp and one was on capacitor voltage distribution. I waited for the result and after 2 days I got to know that I was able to get through it.

Offline Written Test

After the Online test, HR from TI mailed me to give offline written test at TI Delhi office and she also asked me for choice of profile so that the written test agenda could be set. As a circuit designer, I confidently chose Analog design for written test and hence was further informed that the written paper will have section comprising of analog design and mathematical aptitude. I went ahead for the written test after brushing up my basics.

The written test was of 90 minutes and composed of two sections, aptitude and analog, 20 questions each. I can tell you, this was the most fundamental written test I have ever faced. Aptitude section was relatively easy but Analog section was testing the real fundamentals.

There were questions on RC, RL and RLC circuits, resistor divider circuit, capacitor divider circuit, clipper and clamper, Thevenin’s equivalent, op-amp, pole-zero analysis, BJT circuit (CE configuration). Questions were not straight forward, so it’s really important to have your basics clear.

Telephonic Interview:

Following the written test, HR scheduled the telephonic interaction, and they were pretty flexible with the date and timings. On the day of interaction, I was surprised by the fact that there was a panel on the other side to interview me. They started with the introduction and then started to ask about my projects, which I comfortably answered. At that point of time I had concluded my thesis, so their next set of questions were on my thesis which is on sense amplifiers for flash memories. They were more focused on how much improvement I was able to make in terms of different sense amplifier topologies. All and all interview lasted for around 1.5Hrs and it went well. They asked me to wait for the response from their side.

On-Campus Interview:

After 2 days, I got a mail from HR saying that they want to interview me On-campus. HR scheduled my visit to the TI campus, I negotiated and took a week to prepare for it. I went thoroughly on all my projects and thesis. I revised my basics and studied Razavi for Analog CMOS fundamentals. I vaguely remember the topics of my written test and I focused more on those topics. Then came the day of the interview, I was feeling like this could be one of the most important day of my life. As I entered into the campus, a person took me to the place and the place was The Kilby Labs, India. I was getting interviewed for Kilby labs, this made me nervous and excited at the same time. Anyways, interview started. It was a panel of 6 people, all of them from Kilby labs. Discussion started with my introduction and then my thesis. Then the discussion turned from sense amps to the flash memory cells for which the sense amps were designed. Then they started to give me transient circuits with different combination of R, L and C with various voltage and current stimulus and asked me to draw current and voltage waveforms across the components. I was able to do it but with little help from interviewers. Then they drew one circuit, which I later realized was a charge pump circuit and asked me to analyze the voltage at different node in every cycle. I really struggled with this question but finally somehow I was able to do it. With this question my interview ended. I checked the time and it was 2hrs 20mins. Then we took a break for tea followed by 30mins interaction with the group manager of Kilby labs and 30mins interaction with HR, both of them positive. And then my day ended with an uncertainty in my mind about being in TI ever again.

Finally HR mailed me after 15 days or so that they could not take my candidature forward because it does not match the requirements of Kilby labs 😥 . I replied saying it was a wonderful and full of learning experience. Finally, I tapped my back saying well tried and moved ahead with my job search.

P.S. This whole process took almost a month, so a suggestion from my side will be to be patient and confident in your job search. All the very best !!!

Contributed by: Jitendra Yadav

Interview Experience – Ericsson India (On Campus)

This is my interview experience with Ericsson India. Ericsson came to our college (JIIT Noida) on 29th March 2016. It was two days process. On the first day they conducted the Presentation and Aptitude Test. Second day GD, Technical Interview along with HR interview was scheduled.

The selection procedure consisted of following parts:

  • Aptitude Test
  • GD
  • Technical Interview
  • HR Interview

Round-1: Aptitude Test

It was an online test which consisted of 45 questions and the time limit was only 45 minutes. So time management is very important. It included LR, Verbal and Quant. A few important topics are mentioned below:

LR- Number Series, Coding and Decoding, Linear Arrangement, Circular Arrangement, Letter Series, Graph Questions.

Verbal- Synonyms, Antonyms, Ordering of sentences, Spotting errors, Comprehension.

Quant- Area, Volume, Mixture, Profit and Loss, Partnerships, Percentage, Time and Work.

Preparation from R.S Agarwal, Arun Sharma, and solving some online tests would be enough.

Round-2: GD

Only 50% of the students got through aptitude test. In GD round we were divided in groups comprised of 7-8 students. Not many people were eliminated in this round. They were only checking for communication ability and confidence.

My topic was Women’s Safety. There were different topics for different groups. Some of them were E-marketing, Positive and Negative impacts of Social Media.

Round-3: Technical Interview

GD was followed by the technical interview. I entered the room and greeted the interviewer. He asked me to wait for a few minutes while he updated the last student’s review. In the meantime he asked me from where I was. Then he went through my CV.  The first question he asked was about the four pillars of OOPS. I answered encapsulation, inheritance, abstraction and then I was blank. I told him that I am recalling the fourth name so he gave me some time. And then yes, I had and I told “polymorphism” with a little enthusiasm. He then asked me the platform on which Java runs. It was not that difficult because Java is platform independent. And after that he asked me whether stack pointer increases or decreases while pushing data in a Stack in C. It increases I answered. Then he asked me if I had knowledge of LINUX or UNIX. I answered in positive. He then asked me about the OSI layers and protocols. Then he asked me a question on microcontroller-8051. And then he asked about architecture of GSM. He then asked me about Bluetooth as it was patented by Ericsson. I knew that because I had listened to the presentation which was held before aptitude test. (yeah.. an advice – always listen carefully to the pre-placement presentation). And then a question on semiconductor – why base is thin and lightly doped. I was not very confident with my answer but it seemed right. And then he drew a circuit on a paper and asked me to solve for the current through zener diode. It was simple, I calculated correctly. It was 0 ampere because zener was working as open circuit in that. I was pretty confident by then about my interview going good. He lastly asked me if I had any questions for him. I asked and got the answer. Then he asked me to wait for the results.

Round-4: HR Interview

Yay!! This was the last round. I was feeling good. As soon as I entered in the room the HR asked my name and asked the field which I disliked the most. I didn’t get the question properly so she made herself more clear “a field you would never like to work”. I told her that I am open to all. She asked how and then I answered her with few examples. Now the next question was one weakness. I would like to advice you all to be specific and clear about it, because it can sometime lead you into problem. Then questions like why should we hire you and about job location restriction or any time constraints came up. I told her I have not any constraints related to the location and hours. She then asked me to wait for the result.

It was worth the wait. Result – Positive! I would like to tell you all to be prepared and have confidence. All the best 🙂

Interview Experience – Si2Chip – Memory Design

I want to share my interview experience in Si2Chip, a design and layout based service company in Bangalore. I applied though the career section of the company and got the call for the Memory Design requirement. There were two telephonic technical rounds consisting of quality technical discussion. Most of the discussion revolved around Memory design and CMOS basics.

Round – 1

The interviewer initially started by asking me about my previous job and all the works that I have so far done. After a little discussion on that he went straight to one of my memory based project listed in my resume and started questioning my work and approach towards that project. As my project was based on Write Assists in SRAM, he began questioning me about the method and the approach that I have used in my project, then he asked me about the Write Margin in SRAM, I explained the Write Margin with respect to the Voltage Domain but he wanted me to explain the same in the Time Domain which I tried with the best I could make out. Then he asked me about the Read Margin in SRAM which I convincingly told him the SNM (Static Noise Margin). Then he asked me about the most critical timing parameter in Read Operation which I told him that it is the discharging of BL. Then the discussion went to the Low Power Approach that was in my project and he countered questioned me on my implemented approaches. After that he questioned me about the implemented Assists circuit impacting the Read operation and Retention Noise Margin which I explained satisfactorily to him. Then, after some little discussion here and there on Sense Amplifier and decoder he shifted to some basic things starting with the Setup and Hold definition and putting some cross questions to test it like what happens if you have a hold violation at the second flop of the shift register and how will you remove it. Then he stared asking questions on CMOS basics part where the discussion went on like how would you improve the Slew of the transistor output, the answer to that is by up sizing the width then he asked me about the variation of threshold voltage with temperature and asked the reason for every answer that I gave. The best part was that the interview was like a technical discussion and I was given time to think and ponder on my questions and answers.

Round – 2

The second round started with the discussion on Inverter basics like what will happen if we connect the input of the Inverter to its own output and initialize it to logic zero. Then again there was a discussion on dependency of threshold voltage on temperature and doping. Then he asked me about the different margins for the Memory that I know. I told him what I knew, then he asked me about my project on SRAM and asked me to tell the Pros and Cons of the different techniques I have used to implement the Assists Circuit. Meanwhile in the discussion the word Process variations came and then he asked me about the types of process variation that can occur and why. I told him all that I can but he was not satisfied until I told him about the variation due to fluctuations in the Doping Density. Then he asked me general things regarding SPICE simulations like what do you need in order to simulate a circuit etc. Then he asked me about the things I have done to Verify a certain designs, I told him that I wrote directed Test Benches and Test Cases to cover the critical cases for the design.

Finally the discussion ended with a general talk on salary amount and my expectation. The Third round was a face to face interview consisting technical and H.R discussion alike.

overall it was a very good discussion and enriching experience. For those trying out in Memory Design or in Back End Design, I would say get very through with the basics and don’t go through the question banks available on internet directly. Prior to that ‘READ the following BOOKS’ thoroughly

(1) CMOS Digital Integrated Circuits: Analysis and Design

(2) Digital Integrated Circuits: A Design Perspective

These are the ones to start with.

Also make sure that for a Telephonic Interview you have balance and network in your phone, because this mistake happens most of the time and Interview gets messed up. Any queries and discussion please comment below.

Priyadarshi Saxena