A small partner recently participated in a line of Internet companies interview, asked about some of the concurrency-related problems, to see whether we can answer them:
CPU primitive level (1) synchronized is how to achieve?
(2) no lock, tend to lock, lock lightweight, heavyweight lock What's the difference, how to upgrade?
(3) threads between communication with the machine process between communications, cross-machine process between communications, have what method?
(4) the following three services, how to use the thread pool:
High concurrency, short task execution time business
Concurrency is not high, long task execution time business
High concurrency, long-time business execution of business
(5) spike system, how to shore up the 100W level TPS (Taobao up to 540,000 TPS)?
If you usually experience only CRUD
Do not understand the multi-threaded and highly concurrent, face to face such questions, the probability of a large loss.
If so, it is recommended to come up with four hours of time to participate in a Mashi Bing teacher of "multi-threaded and highly concurrent ' training camp
Just 2 cents
Who Mashi Bing teacher?
Mashi Bing teacher
99 years Tsinghua University graduate, from programmer to dry CTO, has been committed to promoting Java, big data, AI rooting China, its high concurrency popular live courses, there are millions of plays to learn.
Let hardcore sweeping Shenseng Mashi Bing teacher will take you multithreading systematic knowledge to help you understand multithreading CPU level to achieve, and how to achieve these layers of maps to those of millions of users, ten million QPS, one million TPS system .
Course price :
List 299, the number of fans only 0.02 yuan .
2 cents , buy can not lose, can not buy fooled.
Learning materials
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The first day of training camp :
1, synchronized keyword bytecode primitive;
2, volatile keyword bytecode primitive;
3, synchronized with the volatile hardware level implementation;
4, no lock, tend to lock, lock lightweight, heavyweight lock upgrade process;
5, the basic concept of the memory barrier;
6, JVM specification how memory barrier requirements;
7, how to hardware-level memory barrier java help achieve high concurrency;
8 interview question 3 (inter-thread communication) of eight kinds of solution;
9, operations;
Training camp the next day :
1, learning and thinking thread pool;
2, using a thread pool of good and bad;
3. Why Ali manual recommends the development of a custom thread pool;
4, a custom thread pool of best practices;
5, the common thread pool types and application scenarios:
1）CachedPool
2）FixedThreadPool
3）ScheduledPool
4）WorkStealingPool
5）ForkJoinPool
6, more than X cows threads in a thread, pressure measurement results show the power of shred;
7. Conclusions;
Camp time :
April 04, 2006 - April 05, 20:00
Training camp full live online , just 2 cents, you can also receive prep for free .
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In addition, the participation of small partners will receive "multi-threaded and highly concurrent" books, free shipping :
Participate in live classes, as well as the opportunity to receive awards, prizes are:
Once again, sweep the code:
(1) receive free prep materials;
(2) participate in games, too, " multi-threaded and highly concurrent " books;
(3) participate in live courses, free never want;
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Sweep over the " two-dimensional code ", 0.02 yuan to buy lessons, 4 hours worth!
