java multithreading interview questions

rewrite the aof file, the performance impact of this persistence is minimal, but the aof file will continue to grow, aof file over the General Assembly to affect the recovery speed of master restart. Master should not do any persistent work, including memory snapshots and aof log files, in particular, do not enable memory snapshots to persist, if the data is more critical, a slave open aof backup data, the policy is synchronized once per second. Master calls bgrewriteaof rewrite aof file, a

many occurrences in the array are greater than half @Test public void Test () {int[] num = {1,2,2,2,2,2,2,4,2,4,6,4,2,6,8,2,7,7}; SYSTEM.OUT.PRINTLN (Morethanhaft (num)); } public int morethanhaft (int[] num) {int result =-1; int times = 0, for (int i=0;iTopic Eight:Determines whether an array is the stacking order of another stack @Test public void Test () {int[] num = {1,2,3,4,5};//int[] num1={1,2,3,5,4}; int[] num2={2,1,5,3 , 4}; stackTopic Nine:Draw 5 cards from poker, 0

Today, I found the java interview programming questions in the Forum and thought about it. I found that I forgot my original programming basics. Question: How many equals 2x8 in the most efficient way? Along with the targeted thinking, I thought of 2x8. Later I thought that this efficiency was definitely not the best. think of the concept of a computer system,

You can only manipulate a type to invert without a generic typeThe code is as follows: Packagecom.swift.fanxing;Importorg.junit.Test; Public classRenyireverse {@Test Public voidTest () {intarr[]=New int[] {1,10,6,9,2}; Reverse (arr); } Public voidReverseint[] arr) { for(inti=0;i) { inttemp=Arr[i]; Arr[i]=arr[arr.length-1-i]; Arr[arr.length-1-i]=temp; } for(intX:arr) {System.out.println (x); } }}Generic functionality can

Java Algorithm interview questions: Write a Singleton, javasingleton Package com. swift; public class Singleton {public static void main (String [] args) {/** write a Singleton */ORC_Hungry.getOrc (). fun (); ORC_Lazy.getOrc (). fun () ;}} class ORC_Hungry {// hungry Chinese private static ORC_Hungry orc = new ORC_Hungry (); private ORC_Hungry () {} public stati

longer executed.(2) But in the case of a hash collision, the first two conditions are established, and then the last equals must be used to determine the equality of the objects.A 3.hash collision scene?(1) Generally appears in large data situations(2) The generation method of Hashcode is weak (such as the artificial production hashcode above)Summary: This chapter mainly through the introduction of hash collision once again in-depth understanding of hashmap work principle.This chapter is here,

1. The difference between String and StringBufferThe Java platform provides two classes: string and StringBuffer, which can store and manipulate strings, That is, character data that contains more than one character. This string class provides values that cannot be changed strings and the strings provided by this StringBuffer class are modified when you know that character data is going to change, you can use StringBuffer typically, You can use Stri

Difference between Forward and Redirect in common JAVA interview questions, forwardredirect The user sends an HTTP request to the server, which may be returned to the user after being processed by multiple information resources. Each information resource uses the request forwarding mechanism to forward requests to each other, however, the user does not feel reque

Unity comprehensive interview questions (including answers) and unity interview questions 1. What is a collaborative program? Enable another logic processing when the main thread runs to assist in the execution of the current program. The coroutine is like multithreading, bu

This section contains questions about XML in Java, JDBC interview questions, regular expression interview questions, Java errors and exceptions, and serialized faces .125) What is the d

IT Industry Classic interview questions, 121 sets of face questions Resource size: 580.80KBResource type:Publisher: EyelifeRelease Date: 2 days agoTag: Famous Enterprises, computerResource score: 10Download Number: 8574.33/347 Person rating 1 2 3 4 5 Comments Collection report sharing--> Comment Share Collection report upload Using the

Latest Android interview questions and Android interview questions Recently, I want to change my job for some reasons. I want to sort out some questions that I think are worth recording during the interview and give them a referen

Summary of vue interview questions and vue interview questions What is the underlying principle of vue? Communication between vue components? How many methods are used to determine the Data Type in JS? The most common judgment method is typeof. Method for judging known object types: instanceof Constructor: constructor

Spring Interview Questions and Answers, Spring interview questions Spring Overview 1. What is spring? Spring is an open source development framework for java Enterprise applications. Spring is mainly used to develop Java applicati

Android interview questions (2) and android interview questions 1. What is the difference between int and Integer? Java provides two different types: The reference type and the original type (or the built-in type ). Int Is the original data type of

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

Android interview questions, android interview1. How to Improve the sliding efficiency of ListView2. Let's talk about the architecture of the project package (networking, parsing, activity, database ).3. how to load a large number of images (including small images and big charts), how to reduce the number of connections to the server at a time, and how to cache images,4. Relationship between onInterceptTouc

Summary of 40 Java multithreading issues and 40 Java Multithreading Preface Java multi-thread classification has written 21 multi-thread articles, and 21 articles have a lot of content. I personally think that the more you learn, the more complicated the content, the more yo

Summary of 40 Java multithreading issues and 40 Java Multithreading Preface I personally think that the more you learn, the more complicated and complex the knowledge, the more you need to make a profound summary so that you can remember deeply and turn your knowledge into your own. This article mainly summarizes the p

writer have completed the synchronization. This series enumerates the key segments, events, mutexes and semaphores of thread synchronization through the classic thread synchronization problem, and makes a summary of these four methods. Then, through two famous thread synchronization instances-producer consumer problem and reader writer problem, the understanding and application of multithreading synchronization mutex are enhanced. I hope that reader