performance engineering interview questions

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

limited.Heap area: Also known as dynamic memory allocation, usually refers to the program when it runs directly new memory, that is, an instance of the object. The Java garbage collector will be responsible for recycling this part if it is not in use.2. How to manage memory in Java　　　　　　　　　　3. Memory leaks in JavaA memory leak refers to a useless object (an object that is no longer being used) that keeps memory or useless objects from being released in a timely manner, resulting in a waste of m

[Interview Questions] Android interview questions, questions android questions Android interview questions The

10 interview questions for programmers I like most and 10 interview questions for programmers Recently, I have read many articles about interview questions. I really don't understand it. The interviewer wants to hire the best prog

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 Java API to process WebS

100 Interview Questions for Software Developers Hiring smart software developers is not easy.If you're not careful you might end up hiring a bunch of moronicMandrills, like I did last year. And you don't want that. Trust me.Stand-up meetings are very hard to do in a tree. The key is to askChallenging questionsThat enable you to distinguish the smart software developers fromMoronic mandrills. And to help yo

general answer. ️ Innodb_buffer_pool_size this parameter is used to buffer data and indexes, and can linearly improve performance. The maximum value can be set to 7% of the memory size. The slow query log is opened and the parameter log-queries-not-using-indexes is added to facilitate the optimization of all SQL statements not indexed in the system. Explain performs query analysis using explain to check whether indexes are used and the number of rows

Summary of Java back-end development interview questions of major companies, and java back-end interview questions ThreadLocal (thread variable copy) Synchronized implements Memory sharing. ThreadLocal maintains a local variable for each thread. It uses space for time, which is used for data isolation between threads

As a Java engineering lion, you've certainly experienced a lot of interviews, but every time you're almost always asked what is the MVC design pattern, how do you understand MVC's similar series of questions about MVC?"Frequency of occurrence""Key Test Centers" The meaning of MVC The structure of MVC "Exam Analysis"In Java Web Development, there are two common development patterns, which t

　As a Java engineering lion, you've certainly experienced a lot of interviews, but every time you're almost always asked what is the MVC design pattern, how do you understand MVC's similar series of questions about MVC?"Frequency of occurrence""Key Test Centers" The meaning of MVC The structure of MVC "Exam Analysis"In Java Web Development, there are two common development patterns, which

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

Unity3d interview questions (all), unity3d interview questions (all) I have summarized some Unity3d high-frequency interview questions, hoping to help you. Limited to individual levels, only some reference answers are attached. ==

Java interview questions, Java interview questionsInterview is something that everyone has to go through. Most people have more than one interview. Here we will summarize the latest interview questions for 2016, so that you can ge

10 most common HTML5 interview questions with answers, html5 interview questions with answers This article shares the 10 most common HTML5 interview questions. Question 1: What is the new HTML5 document type and character set? A

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, but not multithreading, the Unity coroutine che

BAT and major Internet companies 2014 front-end written interview questions: Html/cssHTML article:1. Which of the Web pages do you test? What are the cores of these browsers? Ie:trident kernel Firefox:gecko kernel Safari:webkit kernel Opera: formerly the Presto kernel, opera has now switched to Google Chrome's blink kernel Chrome:blink (co-developed with Opera Software based on Webk

Java --- Java interview questions (1), java --- java interview questions 1. What is a Java Virtual Machine? Why is Java called a platform-independent programming language "? Java virtual machine is a virtual machine process that can execute Java bytecode. Java source files are compiled into bytecode files e

Interview Questions: Differences and connections between distributed and cluster, Interview Questions Cluster I. Differences:In a word, distributed systems work in parallel, and clusters work in tandem.1. Distributed refers to the distribution of different services in different places. A cluster refers to the combinat

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 java, and Integer is the encapsulation class provided by java

. 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