Interview questions for audio and video positions in Dachang -- today's headline

 

      As a IT practitioners , Whether you have a job hopping plan or not . Attend some targeted recruitment interviews from time to time , It's also good for individuals ,

      On the one hand, we can know what hot positions there are in big factories , These hot positions can often show the heat of the development of relevant industries in the society , Direction of capital investment ,

It represents more opportunities .  On the other hand , In the process of interacting with the interviewer, I can also understand some information about the technical architecture of large factories , Related technology stack ,

To see only one spot , It's good for broadening your horizons .

      Most direct , Take the written test / The interview is equivalent to giving yourself a chance to catch up with the exam , It is a test of one's own technical ability , Even if your ability can't meet the requirements of the interview position ,

You can also go home and repeat the order , Check for defects and make up for omissions , Find the direction of study and effort . This is important , Because many people screw in everyday , It is easy to slack off in the work of repeatedly building wheels ,

Even the psychology of blind self-confidence .

        Later, I will recall some of the technical interviews I have participated in , Share it with you in the official account. , If the follow-up time permits, the interview questions will also be analyzed ,

      First , Let's take a look at the interview questions in the headlines , Headline basically every round of interview will examine the algorithm questions , According to the headline boss , Headline employees should first be smart people .

Here according to audio and video , programing language , Make a simple classification of the algorithm

Today's headline 1,2,3 round ： Audio and video real-time transmission expert

1. webrtc Related knowledge ,

2. jitterbuff, fec, nack, 

3. Audio mix , Noise reduction , Echo cancellation and other algorithms

4. ice,stun,p2p Equal principle

5. SDP agreement ,  webrtc Medium offer/answer technological process

6. rtmp Protocol client and server interaction process

7. Streaming media player framework

8. Bandwidth adaptation , Adaptive bit rate

9. Weak network processing , Packet loss , shake , Disorder , Delay

10. h264 The process of encoding a frame of data

11. H265/H264 What's the difference? , h265 advantage

12. C++ Intelligent pointer share_ptr, weak_ptr, unique_ptr principle

13. C++ Virtual functions , The principle of polymorphism ,

14. Quick sorting by hand ,

15. List reversal , Binary tree traversal

16. Matrix shortest path , Dynamic programming

17. 3x+5y+z = 100,   Find all integer solutions

18. How to find the largest in billions of data 1000 individual

19. Linux After starting a new process on the command line , Press down Ctrl+C What happened

20. Network seven layer model , Which floor is the switch on ？

 

Follow up Ali , tencent , Well quickly , Baidu , Ape counseling , Learning and thinking , Audio and video interview meetings of New Oriental and other large factories will be released one after another ！

Sweep yards attention 【 Audio and video development training camp 】,  The interview questions in the blog post will be analyzed and shared later .

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