networking interview questions and answers

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.

10 practical interview questions and answers on the Squid Proxy Server in Linux Not only do system administrators and network administrators often hear the word "Proxy Server", but we also often hear it. Proxy servers have become the norm of enterprises and are often exposed to them. It also appears in the cafeteria of small schools or large multinational compani

English interview questions and answers [] For job hopping, the interview is usually asked why I should leave my current job. How can we make a perfect answer? After reading the following conversation, you will be enlightened! Q -- Interviewer A -- Interviewee Q: Why do you want to leave your current j

corresponding action, while the user's data to fill the corresponding actionform, and then the Actionform is distributed to action for processing.3.Action automatically calls the Excute method, in which the action takes the user-filled data from the Actionform and invokes the model (JavaBean) for processing, and then displays the results of the processing in a different view (JSP page)struts-config.xml:struts 's configuration file .It says that each user's request is handled and forwarded throu

) Select the correct collection type as needed. For example, if you specify a size, we will choose an array instead of a ArrayList. If we want to traverse a map in order of insertion, we need to use TreeMap. If we don't want to repeat, we should use set.(2) Some collection classes allow you to specify the initial capacity, so if we can estimate the number of stored elements, we could use it to avoid re-hashing or resizing.(3) programming based on interfaces, rather than implementation-based prog

TreeMap. If we don't want to repeat, we should use set.(2) Some collection classes allow you to specify the initial capacity, so if we can estimate the number of stored elements, we could use it to avoid re-hashing or resizing.(3) programming based on interfaces, rather than implementation-based programming, allows us to easily change the implementation later.(4) Always use type-safe generics to avoid classcastexception at run time.(5) Using the immutable classes provided by the JDK as key to t

). In the process of populating the handler, depending on your configuration, Spring will do some extra work for you: Httpmessageconveter: Converts the request message (such as Json, XML, and so on) to an object, converting the object to the specified response information. Data Transformation: Data conversion for a request message. such as string conversion to Integer, double, and so on. Data is initialized: Data is formatted for the request message. such as converting a string into a formatt

20 Linux Command Interview Questions and answers Q: 1. How can I view the running level of the current Linux server? A: The 'Who-R' and 'runlevel' commands can be used to view the running level of the current Linux server. Q: 2. How do I view the default gateway of Linux? A: run the "route-n" and "netstat-nr" commands to view the default gateway. In addition to

-threaded access to shared resources, due to improper access, usually a thread locked a resource A, but also want to lock resource B, and in another thread, the lock resource B, but also to lock resource A to complete its own operations, two threads want the other's resources, Instead of releasing their own resources, two of threads are waiting for a situation that cannot be performed.Java Network Programming approximate process:UDP programmingSend side:1, create the Socket object constructor Da

115 Java Interview Questions and answers-ultimate list (I), 115 java Object-Oriented Programming (OOP) Java is a computer programming language that supports concurrency, class-based, and object-oriented. The advantages of object-oriented software development are listed below: • Code development is modularized to facilitate maintenance and modification.• Code r

Regular Interview Questions and answers by a ribaba Java engineer, Baba java 1. Implementation of Spring AOP and IOC Http://blog.csdn.net/tarena_lixy/article/details/7096114 Http://blog.csdn.net/kiss_vicente/article/details/6901295 Http://blog.csdn.net/it_man/article/details/4402245 2. Distributed message queue and distributed cache Message Queue: RabbitMQ, Kafka

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

SQL database Interview Questions and answers (22:52:54) ReprintedBytes Summary of course number of three c courses by Ye Ping Category: Program World Student (S #, Sname, Sage, Ssex) Student table S #: Student ID; Sname: Student name; Sage: Student age; Ssex: Student genderCourse (C #, Cname, T #) curriculum C #, Course No.; Cname: Course name; T #: Instructor No

the Java 5 annotation.Spring's MVC Framework64. What is the Spring MVC framework?Spring provides a full-featured MVC framework for building Web applications. The spring framework can be easily fused with other MVC frameworks (such as struts), which uses the inversion of control (IOC) to separate the controller logic from the business object. It also allows the request parameters to be bound declaratively on the business object.65.DispatcherServletThe Spring MVC Framework is designed around Disp

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

after the real object is called.Proxy mode,The proxy class and the proxy class implement the same interfaceAn instance of a proxy class in a proxy classBehavioral patterns: Focus on communication between objectsSuch as: Responsibility chain mode, iterator mode, command modeResponsibility chain ModelSimilar interceptors, etc.Command mode:Separates callers from Callee's behaviorInterpreter mode:Each syntax is an interpreter classIterator mode:Change the collection class's view traversal and add a

This article originates from: http://www.dbasupport.com The answer here is not very comprehensive, these questions can be explained through a number of angles, perhaps you do not have to give a full answer in the interview process, only through your answers to the interviewer to understand your understanding of the Oracle concept. 1. Explain the different points

33 common php questions and answers, 33 php questions and answers. 33 common php questions and answers, 33 php questions and answers 1. in P

, the following about the IOC description error in the spring feature is ()A,ioc means that the relationship between programs is manipulated directly by the program code.B, the so-called "control reversal" refers to the transfer of control from the application code to the external container, that is, the control rightC,IOC the responsibility of controlling the creation into the framework, separating from the application codeD, when using the spring IOC container, only the objects required by the

In PHP, set four answers and four answers to a strict 30-minute overdue Session Question. In PHP, I set four answers to a strict 30-minute expired Session interview question. session4 answers a question on my weibo today: I often ask a question during the