preface
It is much more difficult to interview this year than in previous years, the Internet enterprise to the requirement of Java position more and more, more and more is also high, mainly primary jobs is becoming saturated, but senior positions are relatively lack, this kind of talent, therefore as a Java developer, we should think about is how to senior talent development, rather than the transfer from other languages, Learn to be the person at the top of the pyramid, instead of avoiding being the person at the bottom.
This paper mainly records my experience in the interview of Bytedance and my personal preparation before the interview. Of course, I was able to get the offer of Bytedance thanks to the “Alibaba Clearance Interview Manual”, which has 349 pages, which I read for 28 days and gained a lot.
The main body of this article is divided into two parts. The first part mainly describes the contents of this Alibaba interview clearance manual, while the second part records my entire interview experience, including interview questions and interview experience.
This Alibaba interview clearance manual is divided into two chapters. The first part is “Interview experience and skills”, and the second part is “Interview technology Conquering”. I will elaborate on the two parts one by one below.
The following content is mainly to write the main outline of this “Alibaba Interview Clearance Manual”, which includes Xmind mind map + actual combat document + interview gift package. If you need to download the completed version, please help to forward it, and add assistant VX: Yunduoa2019 after paying attention to it, or scan the qr code below and follow the guidance of the assistant to obtain it by yourself
Interview experience and skills
1. The interviewer’s mantra
This chapter mainly collects some suggestions and proverbs from the interviewers of the major Internet companies, including Alibaba, Bytedance, Tencent, Meituan and other companies. This part is a little bit conceptual, but it is really beneficial to the interviewees after reading it.
The main points are as follows:
- Dao dao no art, art can be found; Art without tao, stop in art
- Perfection is not perfection
- Keep your feet on the ground and develop a variety of skills
- Keep your mind open
- The workplace is the arena of the capable
- Learn to be an Armchair strategist
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2. Interview experience exchange
This article is mainly included in a front-line Internet company in-service engineer interview experience sharing, “lessons from the past, the teacher of the future” in this chapter fully reflected. This chapter is a unique analysis of the current programmer interview, written test related preparation, time planning, reading books, interview skills, offer selection and other aspects of the content, for the upcoming interview or preparing for the interview of friends have a very good guide.
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3. Corporate interview guidelines
This part, IT is now for Internet companies, network equipment vendors, telecom operators, Banks, etc.), start-ups and other IT companies interview conducted one-on-one powerful analysis, including the different process, the interview content between them, focus and attention, and so on, should have detailed resolution, can be very intuitive understanding to the enterprise requirements.
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Please forward it and add assistant VX: Yunduoa2019 after following it or scan the qr code below and follow the guidance of the assistant to obtain it by yourself
Two, (part two) interview technology
1.Java basics
- What are the advantages of the Java language?
- What are the similarities and differences between Java and C/C++?
- Public static void main (String[]args)
- How to print “Hello World” before main()?
- In what order are Java programs initialized?
- What are the scopes in Java?
- Can more than one class be defined in a Java file?
- What is a constructor?
- Why do some Java interfaces have no methods at all?
- What does the Clone method in Java do?
- What is the reflex mechanism?
- What does package do?
- How to realize the function similar to C language function pointer?
- Object oriented technology?
- What is the difference between object orientation and process orientation?
- What are the characteristics of object orientation?
- What are the advantages of object-oriented development?
- What is inheritance?
- What’s the difference between composition and inheritance?
- What is the implementation mechanism of polymorphism?
- What’s the difference between overloading and overwriting?
- What are the similarities and differences between abstract classes and interfaces?
- What are the inner classes?
- How do I get the name of the parent class?
- What is the difference between this and super?
- What are the rules for naming variables?
- What is the difference between break.continue and return?
- What is the difference between Final, Finally and Finalize?
- What does Assert do?
- What does the static keyword do?
- What are the considerations when using the Switch?
- What does volatile do?
- What does Instanceof do?
- What does STRICTFP do?
- Primitive types and operations?
- What basic data types does Java provide?
- What is an immutable class?
- What are the differences between value passing and reference passing?
- .
- What’s the difference between a Collection and a Collection?
- What is a thread? How is it different from a process? Why multithreading?
- What’s the difference between synchronous and asynchronous?
- How to implement Java multithreading?
- What is the difference between the run() method and the start() method?
- What are the implementation methods of multithreaded synchronization?
- What is the difference between the sleep() method and wait() method?
- What are the ways to terminate a thread?
- What are the similarities and differences between synchronized and Lock?
- What is a daemon thread?
- What does the join () method do?
- How do I access the database through JDBC?
- What approach does JDBC use to handle transactions?
- What does class.forname do?
- What is the difference between a Statement, a PreparedStatement, and a CallableStatement?
- What’s the difference between the getString () method and getObject () method?
- What should I pay attention to when using JDBC?
- What is JDO?
- What is the difference between JDBC and Hibernate?
- .
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2.Java Web
- The Servlet and JSP?
- What is the page request workflow?
- What is the difference between GET and POST methods in HTTP?
- What is a Servlet?
- How to choose between doPost() method and doGet() method?
- What is the life cycle of a Servlet?
- What are the advantages of JSP?
- What are the similarities and differences between JSP and Servlet?
- How to use JSP and Servlet to implement MVC model?
- What is the difference between forward and redirect in servlets?
- What are the built-in objects for JSP?
- What are the main methods of a Request object? What actions does a JSP have?
- What is the difference between include directives and include actions in JSP?
- What are the session tracking technologies?
- How do you specify string encoding in Web development?
- What is Ajax?
- What’s the difference between cookies and sessions?
- What is J2EE?
- What are the common terms used in J2EE?
- What are the different categories of EJBs?
- What are the similarities and differences between EJBs and Javabeans?
- What are the life cycles of EJBs?
- What are the roles of EJBs?
- What is the EJB development process like?
- .
- How does database connection pooling work?
- What are the tuning methods for J2EE development?
- What is the Struts framework?
- What is the workflow for the Struts framework to respond to customer requests?
- How many types of data validation are there in the Struts framework?
- What is the Form validation process for a Form Bean?
- What attributes and child elements are contained in the
element in the Struts configuration file?
- What does the ActionForm Bean do?
- What are the ActionForm execution steps?
- What is the difference between a forward and a global-forward?
- How does Struts internationalize?
- What are the differences between Struts 1 and Struts 2?
- What is loC?
- What is AOP?
- What is the Spring Framework?
- What is Hibernate?
- What is Hibernate’s second-level cache?
- What is the difference between session update () and saveOrUpdate ().load () and get ()?
- What are Hibernate’s primary key generation strategies?
- How do YOU implement paging?
- What is SSH?
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3. Database principle
- What are the functions of SQL?
- What is the difference between an inner join and an outer join?
- What is a transaction?
- What is a stored procedure?
- What are the differences and relations between them and functions?
- What are the differences between paradigms?
- What is a trigger?
- What is a cursor?
- What happens if the database logs are full?
- What’s the difference between a union and a union all?
- What is a view?
- .
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4. Design patterns
- What is the singleton pattern?
- What is the factory model?
- What is the adapter pattern?
- What is the observer model?
- .
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5. Data structure and algorithm
- How to add and delete a single linked list?
- How do I remove duplicate data from a linked list?
- How do I find the KTH to last element in a single list?
- How to reverse linked lists?
- How to output a single linked list from end to end?
- How do I find the middle node of a single linked list?
- How do I detect if a linked list has rings?
- How to delete a node without knowing the header pointer?
- How do I determine if two linked lists intersect?
- What are the differences between stacks and queues?
- How to implement the stack?
- How to find the smallest element in the stack with O(1) time complexity?
- How to implement queues?
- How do you simulate queue operations with two stacks?
- How do I do selection sort?
- How do I do insertion sort? How do I do bubble sort?
- How do you merge sort?
- How do I do quicksort?
- How do YOU do Hill sort?
- How do I do heap sort?
- What are the advantages and disadvantages of various sorting algorithms?
- .
- How to find the first occurrence of a specified number in an array?
- How do I merge two subordered segments of an array?
- How do I compute the intersection of two ordered arrays of integers?
- How do I determine if values in an array are contiguous?
- How to calculate the number of pairs in an array?
- How to solve the minimum triplet distance 8.6 string?
- How to reverse a string?
- How do I determine if two strings are composed of the same characters?
- How to delete duplicate characters in a string?
- How to count the number of words in a line of characters?
- How do I print the array alignment as required?
- How do I output all combinations of strings?
- Basic concepts of binary trees
- How to implement binary sort tree?
- How to sequence traverse a binary tree?
- Given preordered traversal and middle-ordered traversal, how do we solve post-ordered traversal?
- How to find the maximum distance of nodes in a binary tree?
- How do I eliminate nested parentheses?
- How can we find the maximum and minimum of two numbers without using a comparison operation?
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6. Mass data processing
- Problem analysis
- Basic method
- Classic case Analysis
- Top K problem
- Repeat the question
- Scheduling problems
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3. Bytedance Interview Question Restoration (Technical questions)
The bytes to beat I won’t go to the reduction of the whole process of, only share interview problems come out, give priority to with technical interview questions, I can omit Hr surface basically the same, you can refer to the bytes to beat this year will ask what kind of problems, some hot fresh interview questions, hope to be able to give you some help.
- Where does the Session live? How to return session_id to a client?
- What are the complex data structures of Redis?
- What is the difference between Http and Https?
- What’s the difference between thread and process?
- IO multiplexing
- Is redis server multi-process or single-process, multi-thread or single-thread?
- How is top loadAverage calculated?
- How does hashMap resolve conflicts?
- Database transactions, what is a phantom? How are transactions implemented?
- Linux command, how to view the server load?
- How do I check the port usage?
- How to check whether a port on the remote server is occupied?
- The client cannot connect to the server. What is the reason?
- What are the parts of the operating system?
- How is memory allocated?
- What happens when a process switch occurs?
- The fork function
- Project: How to expand and shrink distributed capacity?
- Let’s talk about the difference between B trees and B+ trees
- Three handshakes, four waves
- Why time-wait?
- Java Multithreaded Synchronization
- Project: How to avoid oversold?
- Redis master/slave synchronization
- Why is operating system memory paged?
- B+ Leaves are full, how to add new branches?
- How to sort 5G data and 1G memory?
- Operating system locking principle
- The volatile keyword
- The singleton
- Spring AOP
- Principle of annotation
- OOM situation
- Jvm memory model
- Algorithm part :(1) an array of length n, elements between 1 and n, find a repeated element, the lower the space complexity the better; (2) longest non-repeating substring; (3) Find the next number larger than the current number, such as 1243, the result is 1324; (4) Given an ascending array, a target value, find the largest number smaller than target (similar to an ascending insertion sort step); (5) Linked list loop; (6) time to remove the smallest element of the stack; (7) Find the value with the smallest absolute value in ascending array
Iv. Interview experience
Bytedance’s interviews were more relaxed than those of other big companies, perhaps because the interviewers were young. In fact, bytedance always came across as young and energetic. So, do your homework and the interviewer will probably not be too hard on you.
Bytedance interview, there are a few points to prepare in advance:
Review the fundamentals and principles and look at some technical notes. In the interview, I will definitely ask this part, but most of them just ignored the basic part, which affected the interview result. Therefore, BEFORE the interview, I made full efforts in this part, consolidated the basic and principle, and read some technical masters’ blogs and handwritten notes.
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(2) algorithm. Now many Internet companies like to ask algorithm-related questions in the interview, and BYtedance likes to ask algorithm-related questions, which I believe everyone has heard. From the interview questions I mentioned above, it can be seen that basically the proportion of algorithm-based questions is relatively large. As for many people who ask how to prepare the algorithm, it is actually very easy. The fastest and most effective way is to brush the questions. I have prepared three sets of “algorithm treasure book” for you:
conclusion
People are very different from each other, and we all have our own goals. As a wanderer in first-tier cities, I occasionally envy those who retire happily and steadily in their hometown, but I deeply know that what I want is to make progress year by year.
Finally, I would like to say that no matter what age you are, what city you are in, what background or education background you have, the person you are comparing with will always be you, so next year you see if there is a gap between you and this year, those who do not want to be salty fish, can only try their best to jump. Wish, next year you will be better!
Alibaba interview clearance manual online: please forward it, and add assistant Vx: Yunduoa2019 after paying attention to it, or scan the qr code below and follow the guidance of the assistant to obtain it