java interview questions for 7 years experience

Java and C common technical interview questions 2015 (Continuous updates ...), 2015 updating 1. Differences between overwrite and overload Overload is an Overload. It uses the same name as an existing member to declare attributes or methods, but the parameter list is different from that of the original member. Override is mainly used for method rewriting between

Java Collection related interview questions and answers Interview questions1.JavaWhat is a collection frame? What are some of the advantages of a collection framework? There are collections in each programming language, and the original Java version contains several collect

, Database performance optimization commonly used basic knowledge, millions data optimization (Baidu Search can be).5. Left join and right join usage.6, understand redis,memcache,mongodb, etc., preferably have the experience of project use.7, how to prevent SQL injection.8, a micro-blog review function of the database design, departmental table and staff table design, the Rights Management system database d

client. The expression is defined between the two tags, 9. What does the implied object mean? What are the hidden objects?JSP implied objects are some Java objects in the page, and the JSP container allows these Java objects to be used by developers. Developers can use them directly without a clear statement. JSP implicit objects are also called predefined variables. The following lists the implied objects

take out 1 position: Product: 4 The consumer takes out from 0 position: Product: 2 producer put in 0 position: Product: 5 consumer removed from 0 Position: Product: 5 producer put in 0 position: Product: 6 consumer is removed from 0 position: Product: 6 producer put in 0 Location: Product: 7 producer puts 1 position: products £ º The producers are placed in the location of the product: 8 Position: Product Consumer removed from 1 position: Product: 9

After JDK5, Java provides a more convenient security mechanism that uses lock locks for thread-locked operations and release operations without using synchronized . More clear. Example:Lock lock=new Reentrantlock ();Lock.lockCode that needs to be lockedLock.unlockWhy is lock more secure? Because synchronized may cause deadlock phenomenon, specifically about the deadlock phenomenon can refer to the operating system, there is no more to say.Summarize th

1, to the JVM operation principle and the common configuration must have certain understanding. 2, familiar with the object-oriented design principles, master the common design patterns and application scenarios. 3, familiar with Oracle,mysql and other common database systems, with SQL statement performance tuning. 4, familiar with Unix/linux common operations, can be deployed independently of the configuration Nginx,tomcat and other common Web servers 5, familiar with the common

Java Exception Common interview question one, Java exception understandingExceptions are mainly handling errors that cannot be caught at compile time. The problem can continue to execute smoothly, without causing the program to terminate, to ensure the robustness of the program.Processing: When an abnormal state is generated, if the current context does not have

Java Multithreaded interview questions 1. What is the difference between processes and threads? A process is a stand-alone (self contained) operating environment that can be viewed as a program or an application. A thread is a task that is performed in a process. The Java Runtime environment is a single process that

First, let's talk about the differences between final, finally, and finalize.　　Second, can anonymous inner class (anonymous internal class) be extends (inherited) other classes, or implements (implemented) interface (Interface )?　　Third, the difference between static nested class and inner class is that the more you say, the better (the more general the interview questions are ).　　Fourth, the difference bet

Android development interview: 4. Common basic Java questions, androidjava Follow finddreams blog: http://blog.csdn.net/finddreams/article/details/44403041Because Android is programmed using the Java language, it is necessary for us to fully master the Java foundation for A

and attribute value), and information about the server (by passing a ServletContext object)1, with 1-5 working experience, in the face of the current popular technology do not know where to start, the need to break through the technical bottlenecks can add group.2, in the company for a long time, live very comfortable, but job-hopping when the interview hit the Wall. Need to study in a short time, job-hopp