jvm interview questions

Introduction to common interview pen questions, interview pen questions 1. # include # Include Using namespace std; Void main () { Int c = 5; If (c ++ = 5) { Printf ("% d \ n", c --); Printf ("% d", c ); } Else { Printf ("% d", c ++ ); } System ("pause "); } A

C ++ interview questions, interview questions Run the following code: 1 A * pa = new A [10]; 2 delete pa; The constructor and destructor of Class A are executed () times respectively.A.1, 1 B .10, 10 C.1, 10 D.10, 1 Test: # Define _ CRT_SECURE_NO_WARNINGS # include Test results: Because it is delete p rat

Hadoop interview questions (1) and hadoop interview questions I. Q : 1. Briefly describe how to install and configure an apache open-source version of hadoop. You only need to describe it. You do not need to list the complete steps and the steps are better. 1) install JDK and configure environment variables (/etc/profi

Baidu interview questions to find an array that meets the conditions, Baidu interview questions ArrayGiven the sum of the Functions d (n) = n + n, n is a positive integer, for example, d (78) = 78 + 7 + 8 = 93. In this way, this function can be regarded as a generator, for example, 93 can be regarded as generated by 78

Android interview questions (3) and android interview questions 1. Describe the lifecycle of an Activity. Activity lifecycle methods include:OnCreate (), onStart (), onReStart (), onResume (), onPause (), onStop (), onDestory ();Visible life cycle: from onStart () to onStop () called by the System ()Foreground

mode. Binder Communication mode:A, telephone base station: Binder Driveb, the communication record: ServiceManagerHere is an example of a comparative image to illustrate the above communication and telephone base station in the binder communication model of the role: a classmate to call the B classmate, first a reunion to find B classmate's phone number, and ServiceManager driver's role is equivalent to the address book, There are some similar phone numbers on both sides of the communicatio

What is ANR?Application Not RespondingThe main cause of ANR:The responsiveness of the application is monitored by the activitymanager and WindowManager system services, which can cause the ANR to be monitored when the main thread in the activity clicks more than 5 seconds to respond or if the wood responds in the broadcast UI thread for more than 10 seconds. Here's a list of the details: The main thread is blocked by I/O operations (the network IO is not allowed in the main thread after

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 most basic data type.26, the difference betwe

English Original: Java Exception and Error interview Questions Answers In the Java Core Knowledge interview, you always encounter questions about handling exception and error. Exception processing is a very important aspect of Java application development and the key to writing robust and stable Java programs, which n

(Various companies interview original questions) online has done a set of CC ++ integrated test questions, also to test your level (2), cc integrated test questions I have read the last 10 questions and sent them to me. The following is a question, and I have some understan

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

. NET Common interview questions,. net questions Interview question 1 What are CTS, CLS, and CLR The Common Language Runtime Library (CLR) is an implementation of CLI, including the. NET runtime engine and a class library conforming to CLI.The general type System (CTS) includes the CLI specification submitted by Micros

establishes a dependency between the beans.Simply put, beans are objects that are initialized, assembled, and managed by the spring IOC container.The process of getting the Bean object, first loading the configuration file with resource and starting the IOC container, and then getting the bean object through the Getbean method, you can call his method.Scope of Spring Bean:There is only one shared bean instance in the Singleton:spring IOC container, which is generally the Singleton scope.Prototy

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/luckyxiaoqiang/article/details/7393134 easy to handle

Http://zhedahht.blog.163.com/blog/static/25411174200731844235261/ Question: a step has a total of N levels. If you can skip one level at a time, you can also skip two levels. Calculate the total number of hops in total and analyze the time complexity of the algorithm. Analysis: This question has frequently appeared recently. Companies that focus on algorithms, such as microstrategy, have chosen this question as an interview question or a pen question

Java learning path-simple basic interview questions, java path-Questions 1. What are the features of object orientation? A: The object-oriented features mainly include the following: 1) Abstraction: Abstraction refers to the process of summarizing the common features of a class of objects to construct classes, including data abstraction and Behavior Abstraction.

execution.Surround notification is one of the most common types of notifications. Most interception-based AOP frameworks, such as Nanning and JBOSS4, provide only surround notifications.The concept of pointcut (pointcut) and connection point matching is the key to AOP, which makes AOP different from other old technologies that simply provide interception functionality.The pointcut enables the location notification (advice) to be independent of the OO hierarchy. For example, a around notificatio

Java interview questions, java questionsCommon Java interview questions: What if the main method is declared as private? Answer: It can be compiled normally, but the system prompts "the main method is not public" during running ".Q: What is the difference between passing references and passing values in Java? Answer: T

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

requires rigorous testing. -xx:newratio Ratio of young generations (including Eden and two survivor districts) to older generations (excluding persistent generations) -xx:newratio=4 says the ratio of young generations to older generations is 1:4, and the younger generation accounts for 1/5 of the entire stack.Xms=xmx and the xmn is set, this parameter does not need to be set. -xx:survivorratio The ratio of the Eden area to the survivor area Set to