Digital IC interview summary (interview experience sharing of large manufacturers)

summary offer situation ： The author is a Bachelor of double non ,985 master , The intended position is a number IC Design Engineer , The second choice is the verification engineer ,base All are Beijing , Therefore, students who intend to go to Beijing can refer to .

company ： Huawei Hisilicon 、 mediatek 、 Purple highlights 、 millet 、 Jianan technology 、 Trillion easy innovation 、 Can calculate 、 Yi Siwei 、 Gaotuo Schindler 、 Howell Technology （ Beijing ）、 Well quickly 、 Zheku 、 Zhongkexin 58 the ;

Huawei Hisilicon

Huawei's written test is the first set of written test questions I have done , It was done when I participated in internship recruitment in April , At that time, it was difficult , The written examination questions include conventional digital circuit questions and IC front end , as well as SystemVerilog Verification topic , The types of questions are single choice, indefinite choice and judgement . These topics can be found on websites and official account , Taken together , Hayes's IC Designing written test questions is relatively simple , As long as you prepare carefully, it's no problem .

Huawei has two rounds of technical interviews , The third round is in charge . The first round of technical interview will spot check a written examination question . Then there's the project , The interviewer will ask questions according to the content of the project . Finally, tear the code by hand , This link is somewhat elusive , Some people encounter common code problems on the Internet , Some people encounter questions played by the interviewer according to the content of the project , So students still need to improve their code level , Also prepare regular code topics .

Others got the title of time series analysis . The overall difficulty of the first round interview is medium , In fact, it mainly depends on whether the code is written well .

The second round of interview is still technical , The interviewer's level is higher , More experience . This round of interview is mainly about the project , But the interviewer knows my project in detail , Let me share the design documents of my project , So for my project , The interviewer has understood both the whole and the part . They also raised many questions , Including the processing of cross clock domain ,FIFO Deep consideration , Asynchronous signal processing ,FPGA Verify relevant problems and UVM verification （ The author just started the project UVM verification ） wait , The problem is a little more difficult , And sometimes I will ask some unexpected questions , It's not easy to answer . The overall two-sided difficulty is also medium , It's not difficult , I can feel that the interviewer is very experienced .

The third round is in charge , Still asked me about the project , Just ask less . Then ask about your school experience 、 prize 、 match 、 academic record 、 Major courses 、 Family situation, views on Huawei and other issues , During the whole process, the interviewer also explained to me some of his own life experiences and ways of dealing with people .

Huawei's written examination and three rounds of interviews are not difficult on the whole , The interview process is relatively standardized , The interview duration is medium . If you have confidence in your own project , You can do something PPT Or share documents with the interviewer .

mediatek

The written examination questions of MediaTek are more difficult than those of Hisilicon , The topic will cover digital circuits 、IC front end 、 verification 、 Scripting language 、C++ Problems in language and intelligence , So mastering a scripting language is still necessary . Although Fage's topic is difficult , But it doesn't mean that you need a high score to pass the written examination , Never empty a large volume , Try to write your own thoughts and ideas （ It should be manual marking ）.

Fage has two rounds of technical interviews , The third round is in charge . In the first round of interview, let's introduce the project , Look at the resume UVM verification , The interviewer has been asking questions about verification , Because the author just started learning to verify , So many questions are not answered correctly . Then the interviewer showdown , There are no design positions in Beijing , Ask me if I think about it DV Direction , The author answered yes , Because I learned that Fage's verification training process is complete , Can cultivate Xiaobai into a big cow , So I readily agreed . The latter part is what the interviewer introduced them to me DV Team and DFT The situation of the team .

Second round interview , After I introduce the project , The interviewer really continued to ask me verification questions , Because the author before the interview , I have learned more about the verification work written on my resume , So most of the questions have been answered , The whole interview process is relatively easy .

The third round of interview is for the supervisor , The interviewer speaks faster , The questions asked are similar to those asked by Huawei executives , I also asked the author about marriage and love and about the city where I live .

According to Fage's interview summary , The interview process is relatively easy , No hand torn code , The interviewer is very friendly , If you can't answer the question , The interviewer will give answers . For project content , The interviewer will affirm what he thinks is good .

Purple highlights

Zhan Rui's written test questions are relatively simple , You can check it online .

The author has two rounds of technical interviews , Let's talk together , In short , The interview process was a little sloppy , The duration of both rounds of interviews is very short , No code , The interviewer's questions are not in-depth , I don't know whether I'm not interested in me or I think everyone is the same , Just go through the process （ combination offer Look at the situation , It's the latter ）.

Ziguang group should be undergoing asset restructuring this year , I don't know about the internal situation , If there is an informed boss , It can be discussed in the comments area .

millet

Xiaomi's written test questions are moderately difficult , I remember there is a code problem , You can also find it on the Internet .

There are two rounds of technical interviews . The first round interviewer is younger , It feels like working for four or five years , The question is relatively simple , Comparing to conventional , No code .

The second round interviewer should be the supervisor , The interviewer introduced himself , Detailed questions about my project , The main problems are focused on AXI aspect , Medium difficulty , There is no difficult topic , Finally, I also affirmed my project work , I hope I can join them .

A week after the second round of interview , Suddenly I received a call from Xiaomi , After talking for a long time, I realized that it was the interviewer from the other side , The main content is to ask me about Xiaomi IC View of the 、 How to choose each company 、 I hope I can join Xiaomi and so on , I don't know if this is the third round of interview .

The whole process of Xiaomi's written examination and interview is relatively compact , No procrastination , Good interview experience , however offer The distribution of is sluggish , First, OC, This OC It was given after the second interviewer urged the personnel , If you don't take the initiative to contact later HR,HR Will not send a formal offer letter.

Jianan technology

Forget whether there is a written examination in this company .

The interview is SOC Position , There are two rounds of interviews . The first round is also about the project , Ask some questions about digital circuits , There is a code torn by hand （CPU There seems to be no post ）, Let me write an accumulator , Serial input single bit signal , Output the cumulative result after several beats , Both upstream and downstream are ready-valid handshake mechanisms , After the author finished writing , The interviewer saw the problem of the code , There will be bubbles in the downstream output , The interviewer asked to optimize the design on the spot , Under the tension of being seen as a problem , Finally, the design is optimized and perfected .

The interval between two sides is very long , As a result, I had forgotten that I had interviewed this company when I called to meet twice , Two face time is short . After a series of questions about the project, the interviewer began to introduce the Department .

Jia Nan's first round interview took a long time , About an hour and a half , The interviewer asked a lot of questions .

Trillion easy innovation

The author voted in advance , But I got the official approval , So I did a written examination .

The written examination questions are very routine , Code Title , Difficulty is not great .

Because the author has been urging the elder martial brother inside to arrange an interview as soon as possible , My two rounds of interviews were continuous .

No code was written in both rounds of interviews , Questions about the project are more routine , Asked more STA The problem of . But I heard that some students let me write code .

Can calculate

No written test , Two rounds of technical interviews .

The first round of interview is telephone interview , The interviewer actually knows the author's school project very well （ The school project is in the direction of network chip , It's a relatively unpopular direction ）, So the whole process is smooth , The interviewer pointed out the difficulties and direction of the project , The written examination deeply agrees and puts forward his own views .

The second round is for the supervisor , Still technical , The questions asked are more in-depth , Mainly focused on AXI aspect , Hand tear code synchronization FIFO. Because I just finished running before the interview , So from time to time, the brain is short circuited , Some questions are not answered well , The interviewer finally said it's okay , Remind you to keep exercising .

Yi Siwei

No written test , Direct interview , A technical interview , Round HR Noodles .

Yi Siwei's technical interview made me very unhappy . During the interview, the interviewer showed disdain from time to time , And at the end diss My master's school and major . Ask him about the Beijing Department , The interviewer replied ： I am from Shanghai , I don't know about Beijing .

Hair offer When , Sure enough, I didn't get a higher treatment , Because I feel that the interviewer doesn't like me anymore . A month later, he gave me a salary increase , Then I sent him a thank-you letter .

As of the time when the author coded , It seems that there is a wide range of this month offer Hang upside down last month offer The situation of , I don't know if there will be an upside down situation of spring moves and autumn moves in the end .

Gaotuo Schindler

The company is not big , It is said that it has strong technical strength in related fields .

Two rounds of technical interviews , The first round is telephone interview , The first company to stand up , Changed the time twice . The questions asked by the interviewer are more routine , Mainly around cross clock domain processing 、AXI and STA aspect , The interview time is short .

The second side is the vice president , On-site interview , The vice president is very old , Very thin . A total of four questions .

The first ： asynchronous FIFO Depth calculation , Is very normal ;

The second way ： Realize a general cos function , Probably

This can be achieved by looking up the table ;

The third way , use ROM Realize numerical sorting ;

The fourth way ： find 1-10000 All prime numbers in .

Because I compare vegetables , The last three questions took a long time . Finally, the vice president gave me a personality test , Then he thought I was a person who didn't take fighting for a career as my life goal , People who pursue a plain life .

Sure enough, I didn't receive offer. I can feel that this pair is always a technical bull , But it also requires a lot , Leaders who think they have ideas , The working space of the company is very limited , It feels like returning to high school class .

Howell Technology （ Beijing ）

There are two rounds of interviews , No written test .

Both rounds are telephone interviews , On the one hand, I asked simple questions about the project , Then I began to introduce the situation of their department . The second interviewer is a leader , Asked me a few project questions , Out of a calculation FIFO Deep topic .

Both rounds of interviews are simple , It seems to lack people .

Well quickly

Finally, let's talk about Kwai . I heard from my senior brother that Kwai also makes chips .

Kwai has three rounds of technical interviews HR interview .

The first round , Talk about the project and ask questions , The interviewer asked several difficult questions , But not push I , Let me think slowly. Don't worry , And will guide me , If I say in the right direction , Will continue to let me say . Some I can't think of , The interviewer also gave his own answer .

There are three questions .

The first is to establish according to the trigger / Keep time and clock skew Calculate the fastest working frequency of the circuit under such conditions ;

The second way ： Sequence detector , I mainly want to see my code style ;

The third way , Perform modular operation on serial input data , Divisor is a fixed number . I haven't seen this question before , It's hard , After thinking for a long time , I think that state machine can solve , Because the modulus result is a fixed number , So every time you take a picture , You can find out what the remainder of the current consolidated data is . The interviewer said that what you said was ok , Is the answer I want . ha-ha .

The interviewer of the second round of interview seems to be in Silicon Valley , Difficult questions about my project , Several questions were not answered , Finally, let me write the code , The interviewer played it on the spot , Let me write a part of the code of a module in my project . I wrote it inexplicably . Finally, the interviewer introduced me to the Department .

I feel cold after two sides , But a few days later, I received three notices , I'm very glad to . The three interviewers affirmed my performance in the previous two rounds of interviews at the beginning , And let me make detailed comments and suggestions on their interview arrangements and interviewers , I made a slightly boastful evaluation , Then he took the initiative to introduce the Department situation and future development , And expressed the hope that I could join .

HR Let me introduce the project , Of course, there is no detailed introduction , She asked questions about the part of the project that she was interested in , Asked what I have received so far offer situation , It means that they will send me soon offer distribute .

Kwai's three rounds of technical interviews , I feel very exciting , The interview is difficult , The questions are all very tricky , But the interviewer is very easygoing and not push, Also do guidance and answers . Can feel , All three interviewers are experienced , And very smart people , The team atmosphere should also be good , About the team , More on that later .

Zheku

Approve ahead of time , One side hung up , At that time, I felt inexplicable , Later I guessed that it should be my undergraduate degree .

Zhongkexin 58 the

Because my school project has cooperation with them , It happens that the interviewer is also a project participant , Know my name , So I asked a simple question about the current progress of the project and the problems encountered , The whole process is also very fast .

summary

In fact, in conclusion , Most of the written examinations and interviews of various companies are very similar , Basic knowledge everyone will ask , I will also take the written examination . During the interview , If the project is not in a hot direction （AI、 Images 、CPU、 Audio and video codec, etc ）, Such as the author of this relatively unpopular , Then the interviewer will grasp the common skills on the resume and ask questions , such as AMBA Bus 、UVM Verification related problems , Therefore, we should constantly supplement basic knowledge when preparing the autumn move , We should also constantly improve our own projects .

Improve your project , If you can finish the design documents 、RTL coding、lint、CDC Check 、UVM verification 、 Integrated implementation and other processes , Then your comprehensive strength is relatively excellent . Students applying for design positions , You can relax about the verification work , But we should pay attention to the comprehensive realization .

offer situation

Received offer： Hayes 、 Zhan Rui 、 millet 、 Jianan technology 、 Trillion easy innovation 、 Can calculate 、 Yi Siwei 、 Well quickly 、 Zhongkexin 、 Omnivision .

Including Jianan 、 Can calculate 、 Yi Siwei promised to solve the household registration , Hayes 、 Well quickly 、 Xiaomi said that if the separate policy remains unchanged next year , Account can be arranged .

Fage hasn't given the author a prize , Asked elder martial brother , Elder martial brother's answer is that I delivered it later , The lottery batch is behind , And hope to wait .

On the whole , The treatment of start-ups is higher than traditional IC The company's , But each has its own advantages and disadvantages . If we can determine the potential and strength of the start-up , Then it's also a good choice to go to a start-up .