core java interview questions and answers

English Original: Java Exception and Error interview Questions Answers In the Java Core Knowledge interview, you always encounter questions

Some days ago, I wrote an article in the blog Park, how to introduce my project experience in the interview, Harvest more than 2000 clicks, which undoubtedly inspired me to continue to share the enthusiasm, today I come to share another interview can even help everyone to reverse the skills, this article is from the Java Web Lightweight Development

foundation, grasp the principle of good technology, and then to practice, so as to understand a technology, learning can not have!In addition, the interview process, to maintain self-confidence, will not be bold to say no, no good disgrace, not to say you really will not, perhaps forget, perhaps did not notice, remember the interview topic, back to their own supplementary information and related informatio

foundation, grasp the principle of good technology, and then to practice, so as to understand a technology, learning can not have!In addition, the interview process, to maintain self-confidence, will not be bold to say no, no good disgrace, not to say you really will not, perhaps forget, perhaps did not notice, remember the interview topic, back to their own supplementary information and related informatio

Question one: What do you want the work environment to be like?Standard answer: I am not demanding on the environment, I will try to adapt to the environment.Note: This is a question of whether you are testing your job search mentality, whether you are centered on yourself or on the job.Question two: What shortcomings do you think you have?Standard answer: Say some of the small shortcomings of this position, or say that their "shortcomings" is no work experience.Note: This problem is very sinist

threadlocal, Blocking Queue, counting semaphore and concurrenthashmap are more prevalent. 15 Java Multi-threaded face questions and answers 1 Now there are T1, T2, T3 three threads, how do you ensure that T2 after T1 execution, T3 after the implementation of T2 execution? This threading problem is usually asked in the first round or during the phone

the interview-based, not the actual application-based Java threading problem.A few additional questions to add:1) What is the difference between a green thread and a local thread in Java?2) What is the difference between threads and processes?3) What is context switching in multi-threading?4) What is the difference be

thread encounters IO blocking, I do not think there is a way to abort the thread. If the thread is blocking because of a call to wait, sleep, or join methods, you can break the threads and wake it up by throwing interruptedexception. I've written earlier how to deal with blocking methods in Java has a lot of information about handling thread blocking.13) What is the difference between Cyclibarriar and Countdownlatch in

blocked thread in Java?This is a tricky problem with threading and blocking, and it has a lot of solutions. If the thread is blocked by IO, I think there is no way to stop the thread. If the thread waits for blocking by calling (), sleep (), or join (), you can break the thread and throw it to wake up the interruptedexception. How to handle blocking methods in Java, as I wrote earlier, there is a lot of in

More Java interview written paper series:Java interview written test stationHow does the 1.Java hashmap work?HashMap is a key value for the data structure, each key will have a corresponding value, the key is to identify such a value.HashMap based on the hashing principle, we store and retrieve objects through the put

original address.Redirect is the server based on logic, send a status code, tell the browser to request the address again, in general, the browser will use all the parameters just requested again, so the session,request parameters can be obtained.3 The difference between a dynamic include and a static include in a JSPA collection of questions and answers about Java