android interview preparation

Android interview technical points: xmpp knowledge preparation Socket server termination, Android xmpp The previous section has basically completed communication between the server and the client, but does not implement persistent connection communication. This section fixes the bug. 1. for client code writing, we need

Front-end interview preparation Notes 1, interview preparation notes I. Common web security and protection principles 1. SQL Injection principles The SQL command is inserted into the web form to submit or enter the query string of the domain name or page request, and finally the server is deceived to execute malicious

As I have done a relatively long time technical interviewer, according to my interview experience, many students received after the interview, what preparation will not do, then will come. The consequence of this is: do not know, no bosom friend, every war will be dangerous. Even if you get lucky, your salary will be very low. In fact, the company willing to tak

Interview preparation series 03 ---- Summary of Binary Tree questions in the interview, 03 ---- Binary Tree Interview preparation series 03 ---- Summary of Binary Tree questions in the interview This article is the first article i

Interview preparation series 03 ---- Summary of Binary Tree questions in the interview Interview preparation series 03 ---- Summary of Binary Tree questions in the interview This article is the first article in the

Learn android HTTP preparation knowledge together (16), android preparation In the Android system, the following three communication interfaces are provided: 1. standard Java interface: java.net. 2. Apache interface: org. apache. http. 3.

technical, it is difficult to manage the team, and not very good to do technology cost assessment. Of course, can be changed to do other things, after all, life is so long, if they do not like to do development, do not compete with bugs. 2. Long-term preparation-dry goods if you're in a position where you've decided not to do the technology, skip the rest of the section, and if you continue with the technology, this will be the dry goods for self-im

generation object will replicate multiple times in the Survivor area, which can increase the lifetime of the object's younger generations, increasing the probability that it will be recycled in the younger generation. The parameter is valid only for serial GC.-xx:pretenuresizethreshold object more than how large is directly in the old generation to allocate 0 units of bytes The Cenozoic adopt parallel scavenge GC When invalid another case is a large array object that is allocated directly in th

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

increment of the variable itself declaration, the parent class has the parent class9. ID Type10, on the foundation of the array Nsarray basic video did not see! But 10 pieces of diary want us to have its content!Check it out for yourself!Proficiency in the C Language section and OC sectionPart of the proportion of the programming is to be considered!Is the interview process expected to be answered orally?Do you want to do the

. Otherwise, you will not be able to escape your own project this level, and generally speaking time is not too short.In this part of the story, the general pattern is to tell you what you've done, and then the interviewer will sudden you to explain a part of it, such as explaining why you did it at the time, or asking if you think there's a better way. Most of these interspersed questions are related to the technology you use for your project. And what you need to do is to fully and fully summa

through the HashMap bottom to achieve, but is HashMap value is all assigned to a constant object object, internal additions and deletions and other methods are directly called HashMap method, so do not repeat, and so on, such as HashMap in-depth analysis. private transient hashmap map; private static final object PRESENT = new object ( ); public boolean add (e e) { return map.put (E, PRESENT) ==null ; public boolean remove (Object o) { return map.remove (o) ==present;

Luck2. Talk about Dependency InjectionAll right, I admit I don't understand, the interviewer said jump right in.Please read: http://www.cnblogs.com/xingyukun/archive/2007/10/20/931331.html3. Unit Testingis not feeling very familiar, just don't know how to describe, the pain is extremelyPerhaps these two articles can help us:Http://www.cnblogs.com/hwh_/archive/2011/02/16/1956006.htmlHttp://www.cnblogs.com/Chinasf/archive/2008/03/07/1094334.htmlThree today, there is not a lot of personal opinion,

controls the visibility and life cycle of variables and functions. In JavaScript, the scope of a variable has both global scope and local scope.7. Cross-domainSimply understand is because of JavaScript homologous policy limitations, a.com domain name JS can not operate B.Com or c.a.com the object under the domain name.8. Prototype chain9. Modular10. Custom Events11. Memory leaks12. Event mechanism13. Asynchronous Mount Callbacks14. Template Engine15.Nodejsnode. JS is a set of JavaScript toolkit

= mysql_query("SELECT * FROM user WHERE country = ‘China‘"); if0) { ... } // 有效率的： $r = mysql_query("SELECT 1 FROM user WHERE country = ‘China‘ LIMIT 1"); if0) { ... } 4. Jianjian Index for search wordsRefer to Java interview Preparation 15: Database--Index 5. Use a fairly typed example in the Join table and index itIf your application has many join queries, you should confirm that the fields of j

concurrency Tens large database in Hangzhou famous e-commerce website-read/write separationOptimizing the experience of high concurrency Tens large database in a famous e-commerce website in Hangzhou-SQL statement optimization optimization of a famous e-commerce website in Hangzhou high concurrency Tens large database experience-disk I/O performanceAfter reading the above article, the basic moves you have, as you say there is no recruit win, or recruit deadly, see your fortuneThe difference bet

is a subset of the visual treeWPF handles dependency property inheritance and resource problems through the logical tree, and the visual tree handles event routing, rendering, resource positioning, and moreThe logical tree can be thought of as seen in XAML, and the visual tree contains the structure inside the XAML element5. Property Change Notification ipropertychanged and observablecollection　　　　A. inotifypropertychanged a notification that a property value change is issued to the client.B. O

ReadOnly is the second, dynamic constant. Then the difference can be explained by the characteristics of static constants and dynamic constants.1) const-modified constants must be initialized at the time of Declaration; readonly-Modified constants can be deferred to constructor initialization2) const-modified constants are parsed during compilation, that is, constant values are replaced with initialized values; readonly-Modified constants are deferred until run timeIn addition, const constants

Three years of Java experience, interview preparation (1), java experience Preface Many things are actually from Baidu on the Internet. The following link is your reference article. Thank you for the link author. Java keywords The Java keyword does not count as much as I personally think. Here we select a few uncommon keywords. 1. transientIf a class must implement the Serilizable interface for serializatio

In Java, exceptions are classified as checked exceptions, and run-time exceptions. Both are in the exception class hierarchy. This type of easy-to-choose quiz did you master the exception class and know which exception classes must be capturedThe following figure shows the inheritance relationship of the Java exception class.Figure 1The pink is the checked exception (checked exceptions), which must be captured by the Try{}catch statement block or declared in the method signature through the thro