How did I get into Tencent?

Hey Guys, this is Programmer Cxuan, welcome to watch my latest article. Today’s article is based on the personal experience of one of my loyal readers. This article describes his feelings and summaries from his freshman year to his entry into Tencent.

Vegetable Chicken Adventure

From the end of February to the end of April to get the offer, my spring recruitment is over!

Choosing to work directly instead of going to graduate school like most people do is really a very difficult decision, and the confusion and anxiety I experienced during the college entrance examination was no less than attending the postgraduate entrance examination.

At the beginning of university, like most people, I also wanted to be a good student, to shine like the assistant class, to get high GPA, to participate in various competitions, to obtain the qualification for postgraduate study, and to fill up my resume. Ignorant cognition even made me fall into the gpa theory thinking at that time, and concentrate on hard work.

Unfortunately, at the end of my freshman year, my low GPA made me realize and gradually accept that I might not be good at exams (in the final analysis, I had to make excuses). Even though I tried hard in my freshman year, MY GPA was still very low, which made me gradually doubt my ability.

Now, it seems that gpa is important, but there’s only so much they can prove (at least in the field of computer science), unless they’re really top notch, which is what many college courses know. Here I do not want to criticize university education, but HOPE that GPA will not become the only indicator to quantify students’ ability and cause arrogance and prejudice against others.

The summer holidays at the end of the freshman year, moved to the new campus, start a new life, and since that time, I occasionally find myself interested in all kinds of backpacks technology has complete, from the crawler to the web, from data analysis to the machine learning, basic have had contact for a period of time, that time almost became my technical stages of enlightenment.

In my sophomore year, with my passion for technical ability, I submitted the application for transferring to the College of Accounting and Management with confidence. In my first choice, I failed in the computer test, and in my second choice, I failed in the interview. After asking the reason, I was told that I failed a general education course in my freshman year with a low GPA. It is no exaggeration to say that it was a great blow to me at that time. The voice of questioning myself kept echoing in my head, “Are you better than other students in the computer department without a major?” “You’re not doing your job studying technology! ??” At that point, he was almost out of his depth and faced demotion if he tried to change majors the next semester.

But there were some good things that happened that semester. In my sophomore year, my interest in technology attracted the attention of the Python teacher, who invited me to join his research group. The teacher later became my tutor. In those days, there were almost endless papers to read and algorithms to read. Everything was very novel, and it seemed that I soon forgot the negative energy of failure in my major transfer.

My sophomore year is almost over. Field while feeling algorithm is really cool, I also once fantasized oneself can plunge into the field of artificial intelligence, and under the guidance of teacher learning for some time, also took part in a competition during an article with a prize and water designed example, actually in the heart really appreciate, can meet such a willing to pay for undergraduate students in university career do so teacher really is to me a great deal of pleasure. But on the other hand, while algorithms are really interesting and hot, the bar is really high and the competition is getting tougher.

How to view 2019 autumn recruitment algorithm post ashes?

How to view algorithmic gang a piece of red sea twilight gods?

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All 985 master returnees, top will thesis, top competition Balabala, really dissuaded. I was not interested in paper mathematics and finally gave up, or development is more suitable for me.

At present, I think what is needed on the market is an algorithm engineer with a solid computer foundation and certain engineering ability, rather than a guide package tuning man. No matter which technical post, it is necessary to have a solid programming language, data structure, network, operating system as the foundation. You should become a qualified software engineer and then try to become a qualified algorithm/machine learning engineer.

At the beginning of 20, I finally made up his mind to, decide the future in-depth study in the field of Java back-end, for now, it seems that this is not necessarily the best choice, but at least not bad, at the same time I also pulled out of the tutor team, although there is no continue to do it, but still hit the bottom of my heart thank you very much teacher, because in the competition during the tutor is crucial to our help can say, It was a great honor during my college years to have a mentor who was willing to devote so much energy to undergraduate students.

I started to bite from Java Core Technology Volume I, and went further step by step. Gradually I started to complete small projects, and the road ahead gradually became clear.

During this period, I also met several like-minded partners working on projects together. Although sometimes it was really hard, I believe that when I look back a few years later, it must have been a very happy and nostalgic time.

Entering the year of 2021, as the saying goes, spring recruitment is approaching. Since the end of February, I have been reviewing for more than half a month, and finally I am very lucky to get the offer of summer internship in Tencent. Maybe it is nothing compared with many big guys, but entering a big factory can be regarded as fulfilling my dream of university.

As a just-concluded 2021 for people, to talk about my first utopia and the reality, tencent and ali is one of my earliest selected target (in shenzhen) because the school is in hangzhou, the home, ali group of surface ahead of the three departments are passed, but the last push processes can only choose one department, one side is smooth evaluation is also very good, But in my left for nearly a month after the wonderful me hang up and then be a department, fishing, side through, second interview evaluation is good also, then waited for more than half a month, hang (factory is radically different than the interview experience and goose, process chaos, department of phenomenon is very serious), byte side hang (play the worst round of the interview), tencent round technical HR + round face, Hikon round technical pass. After getting the offer from goose factory, I also heaved a sigh and pushed out the subsequent interviews.

I set up my official account and personal blog a long time ago, but I only wrote technical articles occasionally. Maybe I was busy (actually lazy), but I didn’t put them into action all the time. I hope I can share my mind process and update my mood with my insignificant experience

Data structures and algorithms

A point can be sure of is that whatever the technical post, for school recruit, the requirements of the technology stack may not particularly high, but for the flexibility of thinking, the coding ability, is in very, personally think should start as early as possible in algorithm had better form the habit of brush daily questions every day, from the beginning of 2020, I started my algorithm learning in LeetCode, and I also brushed 500 questions back and forth. Although my level is far less than that of ACmer, my solid level is enough to cope with the algorithm test of Big factory.

Develop a good habit of brushing questions, in the long run to improve coding ability is very helpful!

Attached are some incomplete points of personal summary:

Sorting (quick sorting, heap sorting, merge, bubble, hill, select, etc.) basic ideas of time complexity stability is best written by hand
DFS, BFS, backtracking algorithm
Monotonous stack
Greedy algorithm
DP (e.g. knapsack problem, etc.)
LRU (bidirectional linked list +HashMap)
TopN problem (massive data to find the NTH largest data)
Large file statistics word frequency (dictionary tree)
An operation
Double pointer
The list
Binary tree
Memorization recursion
Binary search
Heaps (e.g. large/small root heaps)
Graphs (directed undirected graphs, Dijkstra, Floyd algorithms, etc.)
Check and set
Sliding Window
Red and black tree
AVL
BTree, B + Tree

Add some popular algorithm learning books and github address:

Sword offer (very classic, almost covers the common algorithmic interview questions)
Introduction to Algorithms (It may be difficult, but this book is also the bible of algorithms)
Labuladong’s algorithm cheat sheet: github.com/labuladong/…

Computer network

The importance of network planning is also self-evident. Some incomplete points of personal summary are as follows:

New features in HTTP 1.1, 2.0, and 3.0
HTTP Common status codes and their meanings
HTTPS (handshake, CA, problem solved, symmetric versus asymmetric encryption, etc.)
Common HTTP request modes
How to optimize HTTP/HTTPS
OSI layer 7 and TCP/IP layer 4 difference and its meaning
TCP three-way handshake (what and why)
TCP four waves (what and why)
TCP TIME_WAIT CLOSE_WAIT status
TCP short and long connection
TCP features and packet structure
How does TCP guarantee reliable transmission
TCP retransmission mechanism
TCP traffic control and congestion control
TCP sliding window
UDP features, application scenarios, and packet structure
DNS resolution and its process
Differences between IPv4 and IPv6
IP address classification
Indicates the subnet mask
DHCP protocol
ICMP (ping command)
MAC address meaning
The difference between switches and routers
ARP protocol
What happens when the browser enters the URL

The plan net has nothing to say, the foundation of the foundation, the regular in the interview, all the way Xie Xiren from the top down black book to chew up is finished ~