concurrency interview questions

Multithreading and concurrency issues are among the questions that interviewers prefer to ask in a Java technology interview. Here, the most important questions are listed from the interview point of view, but you should still have a solid grasp of the basics of Java multith

article to learn more about the callable,future example.6. What is Futuretask?Futuretask is a fundamental implementation of the future, and we can use it with executors to handle asynchronous tasks. Usually we do not need to use the Futuretask class, it becomes very useful when we intend to rewrite some methods of the future interface and keep the original base implementation. We can just inherit from it and rewrite the methods we need. Read the Java futuretask example to learn how to use it.7.

the red box is executed:E = Entry3Next = Entry3.next = null The last step, when we execute the following line, the moment of miracles is here. Newtable[i] = Entry2E = Entry3Entry2.next = Entry3Entry3.next = Entry2There is a ring in the list. The overall picture is as follows:at this point, the problem has not been directly generated. When call get looks for a nonexistent key,and the hash result of this key is exactly equal to 3, because the position 3 with the ring list, so the program will ent

solves this problem for us. After the online pool submits the callable task, a future object is returned, using which we can know the status of the callable task and get the result of the execution callable returned. The future provides a get () method so that we can wait for callable to end and get its execution results.What is Futuretask?Futuretask is a fundamental implementation of the future, and we can use it with executors to handle asynchronous tasks. Usually we do not need to use the Fu

multithreaded programs, multiple threads are executed concurrently to improve the efficiency of the program, and the CPU does not go idle because a thread needs to wait for resources. Multiple threads share heap memory, so creating multiple threads to perform some tasks is better than creating multiple processes. For example, Servlets is better than CGI because Servlets supports multithreading and CGI does not support it.How does the volatile keyword work in Java?When we use the volatile keywor

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Interview points:CClassical language interview questions CAnalysis of language interview questions 5I. Typical questions about C language pointers A) An integer)B) a pointer to an integer (a pointer to an integer)C) a pointer to a

Summary of Java back-end development interview questions of major companies, and java back-end interview questions ThreadLocal (thread variable copy) Synchronized implements Memory sharing. ThreadLocal maintains a local variable for each thread. It uses space for time, which is used for data isolation between threads

Test Questions // Write a function to flip the string. The flip method is as follows: "I am a student" is reversed to "student a am I" without any library function. It is said that this question was frequently used in a written test or interview. I just saw this question in my book, and I saw it again in the blog Garden ("Publish a typical interview

10 interview questions for programmers I like most and 10 interview questions for programmers Recently, I have read many articles about interview questions. I really don't understand it. The interviewer wants to hire the best prog

Interview Experiences Thread concurrency summary, interview experiences --- Restore content start --- Thread Synchronization can be implemented in two ways: user mode and kernel object. The former is lightweight and has better performance, but can only be used for thread synchronization between the same process. The latter is heavyweight, with a greater performa

Summarize the Java Background Development interview questions and the java Background interview questions. Jing er has been summing up some interview questions recently, because he must take everything seriously. The same is true

BAT and major Internet companies 2014 front-end written interview questions: Html/cssHTML article:1. Which of the Web pages do you test? What are the cores of these browsers? Ie:trident kernel Firefox:gecko kernel Safari:webkit kernel Opera: formerly the Presto kernel, opera has now switched to Google Chrome's blink kernel Chrome:blink (co-developed with Opera Software based on Webk