How do programmers get into big factories? You must know these points!

How can I get into a big factory?

Pay attention to recruitment time

There are several important time points for Internet school recruitment: summer internship, autumn recruitment and spring recruitment.

Summer internships are generally held from March to June of the year before graduation. The main recruitment targets are junior or second-year graduate students, and the scale is smaller than on-campus recruitment.

Students who are thinking about finding a job should not miss this opportunity and try to participate in internships. Internship experience can enrich your resume, and some internships can provide qualifications for full-time employment, which is equivalent to getting a guaranteed offer in advance.

However, it is not recommended to give up the autumn recruitment opportunity because of internship.

Autumn recruitment is generally from July to October, and the recruitment target is fresh graduates. It is the largest recruitment among the three recruitments. The company will recruit a large number of people.

In addition, the autumn recruitment is divided into advance batch and formal batch. Even the two batches do not interfere with each other. Delivering the early batch is equivalent to one more opportunity, so you must seize it.

Be sure to submit your resume as early as possible for autumn recruitment. Later, there may be a shortage of positions and merit-based admissions.

Finally, there is the spring recruitment, which is usually from March to May and is small in scale. It is a supplementary recruitment for companies that have not recruited enough people in the autumn recruitment. It is also the last opportunity for school recruitment for fresh graduates.

However, the competition may become more intense due to the participation of students taking postgraduate entrance examinations.

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Determine development direction

Major Internet companies have a clear division of labor and pay more attention to the depth of technology. They require job seekers to have an in-depth understanding of knowledge in one direction. Determining the development direction as early as possible is a top priority.

It's best to make a choice in terms of language. Although all languages are interoperable, mastering a mainstream language will generally lead to more interview opportunities.

Make a resume

The first thing you should pay attention to is not to write everything on your resume, but focus on the experience and awards related to your target position.

Writing too many miscellaneous things will not only not add points, but will also make people feel like you are trying to make up your resume.

The second point is that the content on the resume should be clear and concise, and the description of the project should clearly list the technical points used.

Let the interviewer know at a glance that if your resume has enough technical information, the interviewer will keep talking to you about the things on your resume, and the rate of correct answers will be much improved.

Last but not least, everyone must pay attention to formatting issues. If the formatting is not good, you may not even be able to pass the resume screening process, let alone the interview.

If your own typesetting ability is not good enough, you can use some software to do it.

prepare in advance

First of all, basic theoretical knowledge must be solid. For example, TCP, UDP and HTTP in computer networks, inter-process communication of operating systems, and binary trees of data structures all require a certain understanding.

It is also very important to answer questions if you want to get into a big company. The stronger your problem-solving ability, the higher your chance of being selected. "You have to answer at least four to five hundred questions before you can impress the interviewer."

According to the experience of an experienced person, you must pay attention to the following points when answering questions before the interview:

Identify the authenticity of real interview questions from big companies.
Don't blindly answer questions in a scattered manner, pay attention to the comprehensive and systematic knowledge and technical points.
Master interview skills, avoid interview pitfalls, and identify popular technologies and high-frequency knowledge points.
Question brushing and video explanations complement each other. It is best to improve the breadth of knowledge and technology under the Q&A and explanation of professional lecturers.

Don't give up halfway, the key to learning is persistence.

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Submit resume

It is very important to find the right path. Give priority to internal referrals. Your friends, classmates, and colleagues can recommend you if they join a big factory.

For internal recommendations, you can directly skip HR and show your resume to the department head to get an interview opportunity.

The second step is to find a headhunter. If you don’t have any connections yet, it doesn’t matter. You can find a headhunter. Send your resume to Liepin.com and a headhunter will find you.

Although most headhunters cooperate with many large companies, they cannot skip levels. Resumes still need to be reviewed from HR to department heads.

The next step is to submit your resume. Fresh graduates can pay more attention to the Niuke internal recommendation information summary table. Links to the official campus recruitment websites of major companies will be reflected in it and kept updated.

interview

Compare your compatibility with this position based on the job requirements. Which skills you have mastered and which ones you lack? Take the time to make up for it before the interview.

Understand the interview company in advance. HR may ask questions about the company, such as what is the company's main business? What are the responsibilities of the position you are interviewing for?

…

During the interview process, actively show your strengths. The interview is to discover your highlights. You should seize the limited interview time to show more of what you are good at.

Don't pretend to know something about a field that you have no experience with, as this will leave a bad impression on the interviewer.

Keep in touch with HR at any time to know the specific rounds of interviews and how long it will take to get the results.

If interviews are always unsuccessful, try to record each interview situation, including questions asked by the interviewer, and summarize experiences and lessons learned.

at last

Accept this guide and wish everyone success in becoming a programmer at a major manufacturer in 2024! Here is a " 2023 Android Intermediate and Advanced Interview Questions Collection
" that I compiled in two months . It contains the latest version of eight-part essays and the latest interview questions from major manufacturers, which are all new knowledge points this year.

[Friends in need can scan the QR code below to get it for free! ! ! 】

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Interview question display

Java aspect

Java basics

What is the difference between abstract class and interface?
Let’s talk about final, static, and synchronized respectively.
Please briefly describe String, StringBuffer and
What are the differences and usage scenarios between "equals", "==", and "hashCode"?
What is the difference between deep copy and shallow copy in Java?
Talk about the difference between Error and Exception?
What is the reflection mechanism? What are the application scenarios of the reflection mechanism?
Talk about how to override the equals() method? Why rewrite hashCode()?
Talk about your understanding of type erasure in Java generics, and talk about its limitations?
Why should String be designed to be immutable?
Tell me about your understanding of Java annotations?

Java collections

Talk about the differences between List, Set, and Map?
Talk about the difference between ArrayList and LinkedList?
Please tell me the difference between HashMap and HashTable
Let’s talk about the expansion mechanism of ArrayList?
How is HashMap implemented?
Please briefly describe the working principle and usage of LinkedHashMap?
Talk about your understanding of ConcurrentHashMap?

Java multithreading

What are the ways to use multithreading in Java?
Tell me about the states of threads?
How to achieve synchronization in multiple threads?
Let’s talk about thread deadlock. How to effectively avoid thread deadlock?
Talk about the reasons for thread blocking?
Please talk about the difference between run() and start() in Thread?
What is the difference between synchronized and volatile keywords?
How to ensure thread safety?
Talk about the usage and principle of ThreadLocal?
What is the difference between notify and notifyAll in java thread?
What is a thread pool? How to create a thread pool?
Let’s talk about the common locks in Java threads?
Let’s talk about the difference between thread sleep() and wait()?

Java virtual machine

Let’s talk about JAVA garbage collection mechanism?
Answer: What are strong, soft, weak, and virtual references and the differences between them?
Briefly describe the loading mechanism and loading process of classes in JVM?
What are the principles and differences between JVM, Dalvik and ART?
Please talk about Java's memory recycling mechanism?
What is JMM? What problems does it have? How to solve it?

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Android aspect

Four major components

What are the common communication methods between Activity and Fragment?
Application scenarios of LaunchMode?
How much do you know about Context?
What is IntentFilter? What are the usage scenarios?
Let’s talk about the difference, life cycle and usage scenarios between startService and bindService?
How does Service keep alive?
Briefly introduce how ContentProvider realizes data sharing?
Talk about the life cycle of Activity when switching between horizontal and vertical screens?
Is there a limit to the size of data transmitted by an Intent? How to solve?

Android asynchronous tasks and message mechanism

What are the usage scenarios and usage of HandlerThread?
What are the application scenarios and usage postures of IntentService?
What are the advantages and disadvantages of AsyncTask?
Talk about your understanding of Activity.runOnUiThread?
Can child threads update UI? Why?
Let’s talk about the Handler mechanism and principles?
Why does creating a Handler in a child thread throw an exception?
There is an infinite loop in Handler. Why is it not blocking the main thread? What is the principle?

data structure

What is bubble sort? How to optimize?
Please use Java to implement a simple singly linked list?
How to reverse a singly linked list?
Talk about your understanding of time complexity and space complexity?
Let’s talk about how to judge whether a linked list is a ring?
What is a red-black tree? Why use red-black trees?
What is quick sort? How to optimize?
Talk about circular queue?
How to determine singly linked list intersection

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Android Framework

Binder

What are the advantages of Binder?
How does Binder achieve one copy?
Do you understand the memory mapping principle of MMAP?
How does the Binder mechanism work across processes?
Let’s talk about the communication mechanism of the four major components
Why Intent cannot deliver big data

Handler

What is HandlerThread? Why does it exist?
Briefly describe the overall principle of the Handler mechanism?
Where does Looper exist? How can we ensure that threads are unique?
How to understand the role of ThreadLocal?
What are the similarities and differences between the main thread Main Looper and the general Looper?
How does Handler or Looper switch threads?
Why does Looper's loop() infinite loop not get stuck?
How can Looper's waiting be accurately awakened?
How to get Message? Why is it designed like this?

AMS

What is ActivityManagerService? When was it initialized? what's the effect?
What is ActivityThread? What is ApplicationThread? Their differences
What is Instrumentation? What is the relationship with ActivityThread?
How communication between ActivityManagerService and zygote process is implemented.
ActivityRecord、TaskRecord、ActivityStack，Activi
ActivityManager、ActivityManagerService、Activit
Handwriting implements simplified version of AMS

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Algorithm aspect

How to use the binary search algorithm
How to efficiently solve water connection problems
Binary search efficient decision subsequence
How to remove duplicate elements from sorted array
How to find the longest reply substring
How to perform modular exponentiation efficiently
How to use greedy thinking to play jumping games in a wide area
How to efficiently judge the backlink list
How to randomly extract elements from a wireless sequence
How to determine the legality of brackets
How to find missing and duplicate elements
Please talk about HashMap, the principle of SparseArrary, the advantages of SparseArrary compared to HashMap, and how ConcurrentHashMap achieves thread safety?
Please talk about the principle of HashMap, the access process, why red-black trees are used, the comparison between red-black trees and complete binary trees, HashTab, concurrentHashMap, and what are in the concurrent package?
Please talk about the underlying principle of hashmap put(). When a conflict occurs, how to add it (traverse along the linked list and compare the key values one by one to see if they are consistent. If they are consistent, overwrite and replace them. After the inconsistent traversal is completed, insert the position)?

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Kotlin aspect

Please briefly describe what is Kotlin? What features does it have?
What are some common ways to implement singletons in Kotlin?
In Kotlin, what are inline functions? what's the effect?
Please talk about Coroutines in Kotlin, how is it different from threads? What are the advantages?
Talk about the similarities and differences between Any in Kotlin and Object in Java?
Are there implicit conversions of data types in Kotlin? Why?
What are the ways to traverse collections in Kotlin?
What is the principle of Kotlin's built-in standard function let?
What is the principle of run high-order function in Kotlin language?

Audio and video

How to optimize the instant start of live broadcast?
What are the methods of digital image filtering?
What features can be extracted from images?
FFMPEG: How to synthesize video from pictures
What are the common audio and video formats?
Please describe the MPEG video basic stream structure?
Let’s talk about the data structure of ffffmpeg?
How to reduce latency? How to ensure fluency? How to solve lag? Solving network jitter?
What are the soft solutions and hard solutions that we usually talk about?

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Flutter aspect

Features of Dart language?
How does Dart multitask in parallel?
Is dart pass by value or pass by reference?
What are the features of Flutter?
What is the relationship between Widget, element and RenderObject?
What are the conditions for using mixins?
Stream two subscription models?
What are the core concepts of Widget, State, and Context in Flutter? What problem is it to solve?
Let’s talk about the differences and principles between Hot Reload, Hot Restart and hot update.
How does Flutter communicate with Android iOS?
Let’s talk about what state management is and why it is needed?

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