java interview practice problems

Java Architects interview questions, how to become architectsOften interview some candidates, sorted out my interview using the topic, LU continued to organize a lot of problems, so each time to draw a part to ask. The answer will be gradually released in later articles. B

Thank you for attending our interview:　　The following is a summary of some pre-interview preparation and technical reference questions, hoping to help you.First, you need to prepare a job-related self-introduction, including the following:1. Several years of Java development experience, probably summarized under what type of project, how long the experience (such

done Tell me about your development process. How do you communicate with the team? How do you conduct code reviews Tell me about your understanding of technology and business. Tell me about the Exception you often encounter in the project. Tell me about the hardest bug you've encountered in the project, how to solve it. Tell me about your deepest impression in the project and how to solve it. What do you think is the problem with your project? Have you ever e

Java programmer interview questions (86-115) 86. In Struts 2, how does Action obtain the data that the user inputs from the page, and how does it transmit its own data to the view? A: There are three ways for Action to retrieve data from the page: 1) accept parameters through the Action attribute 2) obtain parameters through the domain model 3) ModelDriven ) Action saves data to the Value Stack. View

call to run () why not?The Java program itself is limited by the existence of single inheritance, if now a class has inherited the Thread class, then this class isNot be able to inherit other classes, so in order to solve such problems, in the implementation of multithreading also provides a Runnableinterface, using interfaces to avoid the limitations of single inheritance.Multithreading using the Runnable

programs.Use assert In addition, assert Note that the-source 1.4 parameter must be added during compilation; otherwise, an error is returned.] Add the-ea parameter during running; otherwise, the assert row is ignored. Eighth, what is GC? Why does GC exist? GC is the meaning of garbage Collection (Gabage Collection). Memory Processing is a place where programmers are prone to problems. Forgetting or wrong memory Collection can lead to instability or e

reference types. 8 different from Parsing: The logic of "and" or "or" often needs to be used in practical programming. where and have a certain difference possible road problems, such as if (S!=nulls.length () ==6), if the value is null, then the value of the first expression is false, The return value is definitely false, and the value of the second expression is not evaluated, which is a short-circuit. However, using , such as if (S!=nulls.leng

Today to share the Java focus on the second part of the wrong point, but also the interview needs of all students to prepare, welcome to communicate correct.1. String creation and storage mechanism: When a string is created, it is first found in the constant pool whether the same string is already defined, based on the return value of equals of type string and, if defined, directly to the reference.You do n

back. c) Consistency: Things are in a consistent state before and after they are executed D) Persistence: the operation of a thing with multiple data is permanent E) Isolation: When a thing is working on the data, another thing can not manipulate the data, that is, multiple concurrent things are isolated from each other. 28. Struts Work Flow A) The client sends a request to the servlet container b) The request passes through some column filtering by Filterdispatcher call, Filterdispatch through

Describes the 7 zones in the JVM, and then describes the scenarios in which each zone can cause a memory overflowProgram Counter: As the current thread doesbyte code line number indicator。 is a threadPrivateMemory, and the only piece does not report outofmemoryerror exceptions.Java Virtual machine stack: Used to describe a Java method.Memory Model: When each method is executed, it will create aStack FrameFor storinglocal variable table, operand stack,