java interview practice problems

Summarize the Java Background Development interview questions and the java Background interview questions. Jing er has been summing up some interview questions recently, because he must take everything seriously. The same is true for the

operation, etc., need to be reviewed in depth) Java Collection Class Framework (understanding the relationships and differences between frames, HASHMAP, ArrayList, HashSet, and so on, where the HASHMAP storage mechanism is almost always asked) Java Exception handling mechanisms (classification of exceptions, common exceptions, Try catch finally used) JVM running mechanism (understanding how the JVM works)

do more with the project process) Design pattern (familiar with common design patterns of the application scene, will draw class diagram, it is not possible to recite a few also useful) Multithreading (ask each time, including thread and process, thread state, thread concurrent operation, etc., need to be reviewed in depth) Java Collection Class Framework (understanding the relationships and differences between frames, HASHMAP, ArrayList, HashSet, an

differences, HashMap and hashtable differences (learn the coding patterns in the underlying JDK for these classes).18, GC is what, why should have GC, simple introduction GC.19, float f=3.4 is correct.20. Introduce the collection framework in Java.21. Implementation of the comparison method in collection framework22. The difference between string and StringBuffer23, final, finally, finalize the difference24. Object-oriented features25, string is the

Five major causes of failure in the Java programmer interview: failure in the java programmer interview The following are the five most likely causes for failure in the interview for Java Programmers. Of course, these five reasons

Java interview third bullet, java interview 1Both Computers are in the same network environment,AComputer Access failureBShared files on the computer. What are the possible causes of this phenomenon?Is it caused? What should I do? First, determine whether the file is in the same working group, check whether there is a

Win in interview Java multithreading (11), interview java Multithreading121. What is a thread? A thread is the smallest unit that the operating system can schedule operations. It is included in the process and is the actual operating unit of the process. Programmers can program with multiple processors. You can use mul

. Exception said that the program can also overcome and restore the problem, which is divided into system anomalies and common anomalies, system anomalies are the defects of the software itself caused by problems, that is, the software developers to consider the problem caused by poor, software users can not overcome and restore this problem, But in this case the software system can continue to run or let the software die, for example, null pointer ex

= null;Child p1 = null;/****************************************** ************* Create constructor and create a circular linked list***************************************** *************/Public createline (int len ){This. len = len;For (int I = 1; I If (I = 1 ){Child p2 = new child (I );Head = p2;P1 = p2;} Else {Child p2 = new child (I );P1.next = p2;P1 = p2;}}P1.next = head; // put this sentence outside the for loop.// P1 = head; // question point --> no use of this sentence}/***************

Java basic interview (1) and java basic interview 1. When I use the final keyword to modify a variable, can the reference not be changed, or can the referenced variable not be changed? When you use the final keyword to modify a variable, it is suggested that the variable cannot be changed, and the content in the object

are asynchronous (at that time, as if C # has no task), so I learned a little, and then do the experiment what, The multi-thread this piece of theory with practice and consolidated again. Sure enough, the interview of the time Hou talked about the above, the interviewer is very interested in this piece, the more asked the deeper, I also know all words, for their own increase points. 5. Do not cheat som

Linked list is often in the interview, this article refers to some other articles, together with the small series of their own summary, the basic algorithm has been tested and optimized.Algorithm Daquan (1) There are also some list problems in the single linked list, which will be sorted out in the future.* REFS:* http://blog.csdn.net/fightforyourdream/article/details/16353519* http://blog.csdn.net/luckyxia

The list is a kind of problem which often appears in the interview, this article uses the Java to realize the common Link list related topic in the interview. This article mainly refers to the integration rewrite the "easy to handle the interview in the list of the topic" and "Algorithm encyclopedia (1) Single list" tw