scala interview questions and answers

, the next () method of the iterator throws a Concurrentmodificationexception exception.Concurrent containers support concurrent traversal and concurrent updates.The main classes are Concurrenthashmap, copyonwritearraylist and Copyonwritearrayset, read this article to understand How to avoid concurrentmodificationexception.8. What is the Executors class?Executors provides some tool methods for the Executor,executorservice,scheduledexecutorservice,threadfactory and callable classes.Executors can

Linux is vast, so that people can always submit different content each time. Our work of The-Tecmint-Team is to provide some unique content for our readers, which is not only useful for their career, but also increases their knowledge. Here, we will try this label: interview Linux is vast, so that people can always submit different content each time. Our "The-Tecmint-Team" job is to provide some unique content for our readers, which is not only useful

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. What is the implementation of concurrent containers?Java collection classes are fast failures, which means that when a collection is changed and a thread iterates through the collection using Iterators, the next () method of the iterator throws a Concurrentmodificationexception exception.Concurrent containers support concurrent traversal

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.Read this 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 execut

PHP interview questions, with my answers and Analysis (1) Interview Question 1 1. use PHP to print the time format of the previous day in the format of 22:21:21 2. differences between echo (), print (), and print_r () 3. templates that can be used to split HTML and PHP 4. how to implement PHP and JSP interaction? 5. wh

using parallelism in Core Data is that each NSManagedObjectContext must be accessed only from the process in which it was created . What is the difference between POST and GET for HTTP?The request for a get type is idempotent according to the HTTP protocol, while the POST request has side effects, that is, get is used to get some resources, and post is used to change some resources, which may create new resources or update existing resources.A POST request is more secure than a GET reques

Http://tb.blog.csdn.net/TrackBack.aspx? Postid = 585636 Interview Questions and answers for top 500 companies Interview Questions and answers for Fortune 500 companies 　　　　 ◆ 1. There is a rectangular cake that has been cut off (t

The interview questions and answers of Fortune 500 companies prompt the Interview Questions and Answers of Fortune 500 companies Source: Computer World Network Responsible editor: lujiezheng 　　　　 [04-5-27] by Blair Watson (US) 　　

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The day before, I posted an article titled "answers to the questions of Lao Zhao interview (I)". I couldn't help but think about some things. The article I wrote the day before yesterday did not expect that there were so many comments. There were always a few comments that looked quite uncomfortable. I think of a previous instructor who said, "Even if this clas