A five-year Android developer baidu, Ali, Jumei, Inke interview heart

Let’s start with what motivated me to change jobs.

When the company downsized, the boss said: “You stay and do well, no matter how the company shares, options, certainly not you.” I trust my boss very much and it is a pleasure to work with him.

However, after the layoff, the company experienced great turbulence, and the main business line was transferred from client A business line to another B business line. I am mainly responsible for the architecture of client A, which is really free. The business volume of business line B is still very busy, so THERE is no time to cooperate with me to do some architectural matters. So I read it every day to get some energy.

After a few days, I regretted that I had not taken N+1. I felt cheated by the boss. Because the following operation of the company made me very unhappy. First, I could not take a taxi more than 30 yuan at night, and then the welfare was greatly reduced, and I suddenly had no mood for work. A week or two later the company announced a new round of financing, which only raised more than $20 million (it was expected to raise more), and then went back to hiring.

I’m at a loss for words. From the company’s point of view, there is no problem. It can save money and also accommodate new blood. But I as an old employee, chill, go to the staff have got N+1, we these old employees what also did not get, but welfare greatly reduced, wounding ah! Now, even if I wanted to leave, I couldn’t get anything, and a strange irritation came over me (just because I was too young to see the big trends, or because the old birds were smart enough to take the money and leave and find a new job).

But it does pay to be rational and give yourself plenty of time to choose a better company. Just like me at the moment, in the company leisurely on the class, riding donkeys to find horses, meet the right, can immediately go. In fact, if I had taken N+1 and left, I would have been in urgent need of a proper job and started to work quickly. As for the new company, I’m not sure.

Has moved to want to go heart, means that it is impossible to stay here very quietly.

In the past, I basically went to the interview directly. I always thought that I had worked for Android for several years and had no problems in the interview. Therefore, I always hit a wall with my pride and confidence, especially when I met many basic questions. Then there are the questions that you remember correctly before, but when the interviewer asks you, you get a big blank look.

Before I went out for the interview, I had almost finished Reading Big Data Structures (think of my previous life, waking up at 7am to read a few pages and then going to work). Although I don’t remember them very much, I can answer them easily when I meet these related questions. Because of the previous lesson, but this time I also is very serious to prepare for a long time (to say the plan to for a long time, my in the mind is very understand Internet companies there may be a lot of risk, particularly no profitable company, technology is the only thing it must firmly grasp, can be in an impregnable position), so I’m going to put the Java foundation consolidation, But I don’t have the right books or materials.

Fortunately, there are many powerful developers in the civil society. They do not aim at making profits, but only to fulfill certain needs, develop an app, and then release it to the application market and give it to those who need it. So I found a “Java interview training” App, the download was still ok, so I installed it on my mobile phone, and started to brush the question mode. It should have been brushed for about 10 days (it was all at work, and I watched it a little bit after work, although the time was scattered, but I remembered it most deeply). In the following interview, it is very rare to meet some strange Java foundation.

Here we have to mention one thing, that is, from the moment of the rise of APP, there are a lot of middlemen. There are many computers or unknown devices in a small workshop room, and the data lines in the room are slowly connecting many devices like spiders’ webs, doing some mysterious things. I don’t have to tell you that they do some pretty nasty things, and I won’t go into detail about what they do, but just to give you an example: The boss of this group of people sees that a certain game in a certain market is very popular, or the app is particularly popular, so he will modify these apps through decompilation and other technologies, and then repackage them and put them online to some obscure APP channels or small app time. There are also some forums, once users download, advertisements will pop up in the APP. Do all kinds of recharge operations in the game, and even automatically deduct your phone bill when you accidentally hit a button. This was done a few years ago, and there were many mistakes in the news. It’s just a lack of supervision.

But then all the companies realized the security problem and they had the technology of app reinforcement, and they couldn’t modify the app. Even if they modified it, it wouldn’t work, so they must pay attention to the security problem.

Using the X hook, I started picking up assignments from less well-known C companies and soon received a lot of interview offers.

After the first company interview, I immediately went to the second company 58, which is near the Datun Road East subway station. When we arrived, it was just 12 o ‘clock. After phone contact, they said that the bus drivers had gone to lunch and had to wait until 2 o ‘clock. (58 had to take the bus from the subway station to the interview, so the journey was acceptable.) Then I ate a meal, in the vicinity of the Internet bar masturbation, see the time point is about the same, I went to that piece of the car, almost walked for 5 minutes to do.

North America International Business Center, Beiyuan Road. There are many companies in this area.

In the first round, I was interviewed by a guy who asked me about some basic Android fundamentals and then the drawing principles of Android. I said: onMeasure, onLayout, onDraw. And then he says what does each one do? What does the onMeasuer mainly do? How to place A custom scroll View A inside another scroll View B? Set the height of the onMeasure in View B to the maximum. This will resolve the conflict. Finally, he briefly explained some parameters of onMeasure, which deepened my understanding of it.

The first pass passed in this way, and in the second pass, a handsome man with a conspicuous wedding ring told me something about the project process. Since I had been in contact with the boss of K Company for a lot, THE general questions were difficult to me, so I easily passed.

Wait until the third level, ask me about work experience, then ask me about career development plans, hobbies and interests, and what advantages you think you have over others. I was curious why the interviewers ended up asking similar questions, and later learned from a well-connected headhunter that they were just checking in on the future and checking out the person’s personality. Here’s what I would say about the advantage: when I talk about the company, I can touch some business things first, and then slowly go down the architectural path, and then I can be responsible for the main core modules. In fact, the same as the above answer, this is basically said routine. They can do it. Why can’t we? Hey hey, don’t learn me, oneself according to actual situation.

I thought it was over, but they said that CTO was not here and there might be a second interview. Let HR talk to me first. HR slowly told me something about the treatment, got to know my situation and asked me how much I wanted. I basically did what the last company said.

Later, when I came back for the second interview, the beautiful HR gave me some advice. She said that the CTO was from Ali, and she liked people who could talk, so she just said what came to her mind and didn’t be nervous. At that point, I was very relaxed and just said what I wanted to say, and he asked me about my career plans and my experience, and it was over in about 10 minutes. I just want to say that HR is really considerate, it’s Nice, and this round is mostly going well. Later, the HR directly said that I was rated AS T5, but I could continue to work hard in the future, and I gladly accepted. Anyway, get the offer again, then slowly compare.

There are a lot of interviews, it may be a long talk, the following is the summary, no longer explain the specific details, just say that we should pay attention to the place in the interview, as well as their requirements for candidates.

Went to yao home leeco, can only say that looks pretty beautiful, but after going in, the fuck really abuse people.

Unfortunately, it was 10 o ‘clock when I went there, which was the rush hour for the company, and the elevator was not in line at all. (In the previous X tour, everyone was in line, but there was no one here, maybe the place was too small to open). The elevator couldn’t get up, so I had to climb the stairs with some people until I got to the ninth floor, feeling out of breath.

Go up after a beautiful HR (long legs elder sister) take me to find the interviewer, and then said there was no meeting room, the original meeting room into a workstation, so let me stay in a small corner (cleaning aunt’s exclusive location), after a while the interviewer late, is also something very fundamental, is the most important of them mentioned push, how to implement, The survival situation has said a little bit.

The second interviewer also came late, waiting for a long time, idle and bored chatting with the cleaning aunt, along with a look at their office environment, can only say really crowded. After the second interviewer came, he looked at my experience. Since the technical aspects of the first round were all over, he talked briefly about their development prospects and their plans to make overseas products. Listen to me being excited and happy, and then let me wait.

Most of them went to dinner, leaving me to wait. Then a HR sister came and talked about salary and experience with me. She seemed to have great opinions on my changing job in one or two years, so I gave her some basic knowledge of Internet industry. Unexpectedly, just before I was done, the eldest sister of the little sister came over and saw a beautiful sister HR (long-legged sister) sitting opposite me. (My little sister indicated that this was her eldest sister). Instantly not happy, all immediately finished talking, the results come again, really speechless. Can only just the brilliant moment to install B once again, and then talk about salary what, give is not a lot, I want XX, she said so much, can only give me the lowest salary range of a grade. Ok, go ahead, and then insist that I fill out a background check form first, if there is no problem, then send me the offer, I saw the beautiful woman holding that big paper, instantly speechless.

I was not how happy, and then long legs sister after all sophisticated very asked: “say you are not ok?” . I said yes, there would be an interview at 1:00 somewhere else, and she said, “You go home, I’ll email you this form, you finish it and send it to me.” Then Long-legs walked me out, and I had to walk all the way down the f * * king stairs (9 floors) to get off the elevator.

Sina is located in ideal international building, remember a few years ago when sina interview, silly did not prepare to go, the result of the first close to hang.

This time in the afternoon, with a drizzle outside. After I went to ask me to do the interview questions, I have not done the interview questions for many years. But remember the previous experience, or to write honestly, according to my estimate the interview buddy should ask the above things. Fortunately, I did all the preparation this time, brushed more than N interview questions, and supplemented the basic theoretical knowledge of data structure. Write like flowing water, swish swish of not a few minutes.

The first guy who interviewed looked at the test paper and didn’t have any opinions, then asked if there was any problem with the last correction programming question. Although I pointed out several mistakes, I felt that he was not particularly satisfied. So I took a closer look and found a static variable referencing the Activity’s context, then pointed out that he had asked for some low-level stuff and performance optimizations, and it was a breeze.

By the time you get to the second one, this guy is a tech geek, asking about a lot of Java stuff: polymorphism, abstract classes, multithreading, memory management, etc. I feel the answer is not very good, polymorphic that is a bit of a problem, the other should be ok.

Then I entered the third interview. The interviewer in the third interview should be the head of the department. He asked about his work experience, interests and hobbies, his future development direction and what level he wanted to do. Very unfortunately finally is when waiting for the 4th all around, the United States eyebrow that gives me the title at the beginning tells me time is very late, let me go back first, wait for a message later.

At least this time more advanced than the first time, not the first round of brush down. Finally, the reason is that the salary is too high, especially in this kind of company.

Baidu takeout now does not belong to Baidu, but separate points out.

One of my colleagues went to Baidu Take-out, and I felt his ability was similar to mine, so I asked him to recommend him.

After going there, up a very long step (feeling very solemn appearance), have to swipe card to enter. After a long wait, the interviewer led me downstairs to my communal desk, one of those open Spaces in the middle where you can see other people moving from floor to floor. One of the older interviewers, at first feeling relaxed, said, “Tell me about Android basics.”

The first question is: “Let’s talk about the four components of Android.” I’m totally confused. Fuck you, talk to me about the four components. Interesting? I didn’t expect to end up talking to me about these, one after another. Speaking of broadcasts, there was a long debate about whether an app could receive broadcasts after it was killed.

Then he asked me to draw the architecture diagram I had designed before, and I did it at random. However, the interviewer who looked so nice surprised me, and he told me with a contemptuous smile, “You are too elementary.” I had tens of thousands of grass mud horses in my heart at that time, you are 30+, don’t know to encourage new people ah, I said that I just made a framework for a short time, and despise me, if you have the ability to make a framework for me to see ah, do not respect our younger generation of labor achievements. Maybe it’s my fault that I just did what he said and didn’t take it seriously. When I interviewed with other companies, it wasn’t great, but at least it addressed some areas, and the other interviewers were very modest. This baidu takeout interview, really not my favorite leader, if I really let him to take me, it is really finished, many times we are because some people killed our initial beautiful bud, and then lost the sense of innovation.

Fortunately, when I was in K Company, the boss always encouraged me to innovate and do what I wanted to do. Therefore, I was very tired but happy to work all the way down.

So whenever someone asked me why I chose K Company, I would proudly say, “My boss is very good, I am very comfortable and happy there.” The last piece of advice my boss gave me as I left was, “You should always reflect on whether you have been brainwashed by others at this moment.”

Baidu is located near shangdi 10th Street in Haidian District. There are many buildings. I went to a department dealing with foreign tools. After I went there, I was shocked by the environment and atmosphere of Baidu. In a large technology park, there are NetEase, Baidu and Tencent, and another building is under construction opposite, which is probably the site of another Internet company.

After entering the building, I did not have time to eat, while eating the cake in my hand, while browsing baidu’s outer office area. After entering baidu’s building, two entrances are equipped with card swiping machines.

After a long wait in the free area, I was led into the building by a man. Before entering, I went to the front desk where the interviewer typed in his email account and then asked me to fill in other registration information. What impressed me most was that there was a note pasted above the monitor saying: Please register here when you leave, otherwise you will be blacklisted by Baidu. At that time shocked along while, did not expect unexpectedly this strict.

After entering the building with the interviewer, the only impression I remember is that it is very neat and tall. After the stairs, the foot is stepping on thick carpet, walk a little faster, feel very flabby, the foot is like stepping on cotton.

Why to have carpet, rather than floor tile ———— to summer a lot of beautiful long-legged beauty wearing high-heeled shoes to step on floor tile is a how to experience? Unter den unter den…

I waited in the waiting area for the first interviewer, and then we had a quick chat about Android technology, two things worth mentioning:

• One of them is: talk about the event distribution mechanism of the View. Then I said a lot from WindowManager->window->Decorview-> child view. Finally, I said that when all views do not handle events, events will eventually be passed to the Activity’s onTouchEvent. The interviewer immediately says, “Huh? Are you subverting my idea?” Then I realized that there might be a problem, but I remembered that the Android Art Exploration did mention an Activity, but it wasn’t onTouchEvent. The interviewer’s confidence made me tremble. But with my conviction, the interviewer said, “No, I can’t accuse you of no!” Immediately on the MBP at hand to take a look, soliloquized and exclaimed: “Really ah!” I was speechless.

• Another point: Ask me if I can pop up a dialog box on the Service. I remember a year ago, I was embarrassed by this problem in another company, so I made a special supplement for it. I said yes, but the interviewer gave me a different look and told me no, Dialog must be attached to Window to display. Then I explain something that frustrates the interviewer for a moment: I said it could pop, and I had tried it before, but it was conditional. Condition is:

  • System permissions must be registered in the Manifest
  • A flag must be added when the dialog is displayed. My reason is that the system dialog can pop up when the battery is low, and we can also adopt this way to achieve this.

The interviewer was speechless and then told me that Dialog must be attached to a Window and Toast is actually a Window. As I listened to these words, I remembered an article I had read before that was exactly what it said. Probably the interviewer will need to supplement some knowledge. Then the interviewer told me that I couldn’t write a queue with an Arraylist, an array. There are three main methods: put(), get(),peek(). And then think about the nature of the queue, one end comes in, one end goes out. At that time, I met a blind spot and did not finish the writing. Finally, I told the interviewer my ideas, which were generally right. But I’m not so sure about the location. But that doesn’t stop me from going to the second round.

In the second interview, the interviewer brought a lot of paper, and I was stressed out and knew it wasn’t good. As expected, the interviewer went into all kinds of principles step by step, from animation implementation principles to handler implementation principles. When I felt that THE answer was good, then he continued to follow my questions. I can only say that I tried my best. I did not pay attention to some things during the development, but BECAUSE I did not pay attention to them, I could not continue to answer his questions.

When the interviewer took me out of the building, I was in a bad mood. It’s a pity that I didn’t enter Baidu. I should prepare a lot of things later. I say, I will come again, hahaha! Finally also return the body of a sign to the front desk, the province was pulled into the blacklist (good scary appearance).

In the future, if you have time to look more at the original things, you’d better organize a blog and write down some of your views and feelings, so that you can remember the deepest, even after a few years, you will not forget, just look at what others summed up, really not how to remember.

Blogs can use Hexo, and so can my blog, which can organize some of its own things and insights.

Jumei youpin is located near dongshitiao subway station. Past a bamboo pavilion, after entering the building inside need to use id card at the front desk to give me a note after the registration, with my id card information, and then near the entrance card brush qr code into (oh, really worry about personal information leak under normal circumstances, of course, no one will pay attention to who you are, don’t do bad things, will be found out, ha, ha, ha).

My colleague who recommended me to Jumei Picked me up and took me to the front desk to fill in the basic information. I just wrote the basic information, and she said, that’s all you need to write. I said, in fact, this information is enough, writing so much is useless, and will reveal your personal information. After the success of the interview, if there is a need to write more detailed, but generally go to the interview had better not write id information. You don’t need to include the last two years of your working experience. You can include them all in your resume.

Remember just work that time, silly write all, really delay a lot of time. After a while, she handed me over to the beautiful HR gentle sister, and then went to work. Sister Wen told me that in general, there are two rounds that are basically over. First, let the chief architect directly face me and let me wait.

After a while the gentle elder sister embarrassedly told me that the architecture eldest brother let a technical face I, ask me whether I have an opinion, I certainly did not have an opinion, this is a very standard interview process (if you have an opinion, the suggestion or don’t say too much, basically all such, to calm down).

The first technology gave me a very mature feeling, began to ask me some basic technical questions, plus Java memory management knowledge. After give me out of an algorithm, says the best have an array to store the number 6, if there is one ordinary users, storage four VIP customers, the other two are ordinary users (set aside a certain amount of space to the general user), consider a comprehensive point (typically in combination with the actual scene, let you write an algorithm that requires is the ability of abstraction, ideas and details to deal with problems, And basic coding skills).

And then I’m going to think about all the different cases, the first one is non-null, and then I’m going to have a couple of big if and else conditions, at least four conditions, basically covering all the cases, and then I’m going to write in each of these conditions what I’m going to do to store the data. Since my four major conditions have taken up almost the distance, I will describe them in Chinese when I write the details. After a while he came back, took a look and said: “You still have Chinese ah!” I smiled awkwardly and said: “I wrote the conditions first, and finally found no space, can only use words instead, you see I am writing the whole algorithm on another paper.” He pointed to the half-written code on the paper. He smiled and pointed out where the algorithm could be improved. It was basically ok.

Then wait for the second round of interview, which looks more mature, but speaks with a very close feeling. Asked about the basic situation, and then took out their APP to show me the implementation effect of the home page, and explained how to achieve it. In this case, it’s basically about your ability to abstract, your ability to analyze. I’m going to say use the header of the ListView, footView, and then use the Type of the ListView. After talking briefly about performance optimizations, the interviewer suggested that there might be a performance bottleneck. In fact, he told me that there would be problems in this area. Of course I understand what he meant, so he said that recyclerview + fresco can effectively improve the problem. (In fact, mentioning these, it means that you have seen a lot of new technology, and it is best to practice these things by yourself if you have time, after all, practice makes perfect.)

He didn’t dig into it. He basically felt good about it and started talking about their current situation and the problems they were going to have. He treated me like an insider in every word he said, and I felt comfortable. Finally told me that if I wanted to, he would report it, which meant he could move on to the next round. At that time, when he asked me about my salary, BECAUSE I had said many times before, some were successful, some felt bad, so I did not say this time, just smiled, and the other person said: “Then according to the annual salary, how much do you want?” Without thinking about it, I said, “I’m looking for a 15-20 per cent increase in my current salary.” After a few strokes on his phone, he told me he could achieve my desired effect. The whole process was enjoyable.

Because I have met some and have offered, but I still want to see more, so I feel exhausted. But at the end of the day, Gentle Sister called me and said I had passed the interview.

Here’s a quick list of things that may not be exhaustive, but are particularly applicable, and may not necessarily follow the following process. It may be interspersed or both, depending on the size of the company and the mood of the interviewer (hahaha, you’re on your own). I suggest you still want to master all the following things, nothing to write code, practice, in the project can be used in the place must be used, there may be a lot of pits, must think of their own ways to fill pits, later recall this experience, certainly can dare to discuss with others confidently. If what you say is reasonable, then the other party will first lose a layer, and then admire you in the heart.

1. Generally, the first round is a basic interview, which requires a solid foundation
   • Most commonly used Android basics
   • Java Basics
   • Understand the principles of common things, such as handler and thread
   • Technical points in the project
2. You need to know something deeper in the second round
   • Principle of the Android event distribution mechanism
   • Android drawing mechanism principle
   • Knowledge of Windows Manager
   • Interprocess transfer mode
   • Java memory management mechanism
   • Some common list,map principles, and differences between subclasses
3. There’s no problem making it to the third round, but what about the following
   • This round is usually the boss or the head of the department, and the questions they ask are generally based on depth and breadth
   • When asked about salary, to say a suitable, small companies at will, large companies must be careful, when the heart is not bottom, you can tell each other, let each other give a reasonable salary. Are generally in the original salary based on the growth, listen to headhunter said that the general increase in 15%-30%, super NB can be 30% and above, if you feel good, very severe, the proposal is the highest 20%, the average person is about 15% of the most reliable. Companies generally have a set of mechanisms, depending on the company.
   • Our interview principle is to get a reasonable salary and get the offer
   • Personal development, this question is difficult to answer, if it does not fit with the direction of the company, it is very likely to be excluded from the company. It is recommended to ask tentatively what the company lacks and if you can provide it. Of course to have self pursuit of the person, that can rest assured bold mention. My direction is architect, ha ha ha, pretty extreme, don’t be like me oh. I feel like the choices work both ways, so I know what I need.
   • What UI are you best at or something else? This question is even harder to answer. If you say you’re good at UI, does that mean you’re not good at anything else? Although I don’t know the interviewer’s intention, I can sense that this question is not easy to answer. I will reply that I can handle any business needs. The answer may not be very good, in short, with the company’s position on the line, so total will not make a mistake.

If you have any questions or questions about the interview, you can add my wechat account mianshishuo and scan the qr code below to make fun of your feelings during the interview. I will share the latest Android interview questions and experience from time to time. You can also send your interview experience and questions to me for discussion. Thank you very much.