A small partner recently participated in an interview with a front-line Internet company , I was asked some concurrent questions , See if you can answer it :
(1)synchronized Of CPU How the primitive level is realized ?
(2) No lock , Biased lock , Lightweight Locking , What's the difference between heavyweight locks , How is the upgrade process ?
(3) Inter thread communication , Interprocess communication with machine , Interprocess communication across machines , What's the way ?
(4) The following three businesses , How to use thread pool :
*
High concurrency , Business with short task execution time
*
Low concurrency , Business with long task execution time
*
High concurrency , Business with long execution time
(5) Seckill system , How to support 100W level TPS( Taobao is the highest 54 ten thousand TPS)?
If there is only CRUD Experience of
Do not understand multithreading and high concurrency , Face such interview questions , I don't know about the rate .
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Who is the horse soldier teacher ?
Horse soldier teacher
99 Graduated from Tsinghua University in , From programmers to CTO, Although already 45 year , But the sword is not old , Has been committed to promoting Java, big data ,AI Take root in China , Its high concurrent live courses are popular , Thousands of times .
Let the ashes level sweeping God monk horse soldier teacher take you to systematize multi-threaded knowledge , Help you understand that multithreading CPU Realization of hierarchy , And how these implementations map layer by layer to those hundreds of millions of users ,
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Course price :
original price 299, Fans only need 0.02 element .
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Learning materials
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First day of training camp :
1,synchronized Bytecode primitive for keyword ;
2,volatile Bytecode primitive for keyword ;
3,synchronized And volatile Hardware level implementation of ;
4, No lock , Biased lock , Lightweight Locking , Upgrade process of heavyweight lock ;
5, Basic concept of memory barrier ;
6,JVM How to require memory barrier ;
7, How hardware level memory barriers help java Achieve high concurrency ;
8, Interview No 3 topic ( Inter thread communication ) Of 8 Seed solution ;
9, task ;
Training camp day two :
1, The study and thought of thread pool ;
2, The advantages and disadvantages of using thread pool ;
3, Why Alibaba development manual recommends customizing thread pool ;
4, Best practices for customizing thread pools ;
5, Common thread pool types and application scenarios :
1)CachedPool
2)FixedThreadPool
3)ScheduledPool
4)WorkStealingPool
5)ForkJoinPool
6, Better than thread X Thread of , Piezometric results show the power of fiber path ;
7, summary ;
Training camp time :
5 month 13 day -5 month 14 day ,20:00
Training camp Live Online , Just 2 Cents , You can also get preview materials free of charge .
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(2) Participate in small games , have to 《JVM Practical optimization 》 book ;
(3) Participate in live courses , Free draw ;
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Sweep up “ QR code ”,0.02 RMB purchase ,4 Hours , worth !
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