leetcode system design questions

I want to share some questions about Java Course Design in my school. You can use it as a trainer! 1. Subject: Arithmetic Operation TestFunctional requirements: This program uses the character interface to add and subtract mathematical questions within 10 to 100. It can calculate the answer based on the question, compare it with the input answer, determine wheth

I really don't know what to choose. I didn't understand a few questions in the list provided by my teacher. Considering that I chose a wrong choice during my undergraduate course, so this year I have to make it clear .. So please give me some ideas. Thank you first... The list provided by the instructor after my screening is as follows: 1. Address Book Web Service This is a simple online address book. At the beginning, I could not believe that s

Ask the great God for questions about database design I am a rookie, recently in the development of a repair system based on PHP+MYSQL, developed to half found the structure of the database has a serious error. The main problem appears on the association of the user table and the Web_order table, the primary key UID of the user table is associated with th

This is the topic that a netizen asked questions when I first got to work this morning. I personally felt that it was quite common. So I copied my QQ message and compiled it into an article. This is not a big topic, but I think the design principles embodied by professional programmers in Coding are of great reference. You can refer to them. Netizen 9:39:17Class Memory: public NativeObject {Public:Memory ()

Package com. Threadlearn.test; Import java.util.*; Import Java.util.concurrent.locks.ReadWriteLock; Import Java.util.concurrent.locks.ReentrantReadWriteLock; Interview questions, design a caching system; Use pseudocode to implement public class Cachedemo { //Storage object Container private map

Ten questions about Linux file system--About the file system, you know? Article Source: File system ten QuestionsAbout the file system, I believe that everyone is not unfamiliar. As a siege lion we deal with it almost every day, but the depth of the section, and how much of

advertising spaces (which affect the extracted code ). If a third-party system is provided to the website for free, the "add remaining traffic/Network Alliance Plan" option may be set to facilitate third-party companies to collect and use media traffic. Currently, the advertising system on the market is divided into two directions: for advertisers and for website owners, that is, for advertising and for pu

improving the read and write performance of the disk.Ii. Directories and documents1. IntroWell, the disk basics are over, so let's go into the topic and start our Linux file system discussion. Is the file system not a directory or a file? These two people are familiar to us. But are you sure it's not your familiar stranger? I'll go first. Create an empty directory and empty files to see the results such as

Ten questions about file systemReference: http://djt.qq.com/article/view/620 about Linux file system related issues: 1, mechanical disk random read and write speed is very slow, what is the operating system used to improve the random read and write performance? 2. Does touch a new empty file occupy disk space? How much does it take to occupy? 3. Do you want to cr

2012 System Architect Exam in the afternoon, there is a 25-point design pattern, the morning is still 5 multiple-choice questions, can be said to be from the 2009 test design mode of the largest number of the year. Sunny friendship Suggestion: suggest you do these questions

Link: http://www.etc.edu.cn/articledigest16/wang-xian.htmThe Design and Implementation A web-based testing system Yang Juan * Cheng Jiangang * Han xibin * Cao Yan * Wang Xueyou ** * Tsinghua University Education Software Research Center E-mail: yangj00@mails.tsinghua.edu.cn ** Tsinghua University Institute of Modern Education Technology Tel: 010-62782405 Topic Selection This article introduces the

What does the command nslookup do? Nslookup is a command-line tool that monitors whether DNS servers in a network can correctly implement domain name resolution. How do you show the process with the highest CPU usage? Top-c Sort by CPU What if I check the open ports on Linux and screen out unused ports? Natstat-ltup view open up those ports, not the firewall shield off What is Linux? How does it differ from UNIX? Linux is a free-to-use and free-to-propagate Unix-like operating

. Synchronize the data between the main library and the library, and then repeat the action again13. Use a single command to turn off all services except SSHD, Crond, network, Rsyslog services (no power-on automatic)Method One:[[Email protected]~]# for name in ' Chkconfig–list|grep 3:on|awk ' {print '} ' |grep-ev "sshd|crond|rsyslog|network" ';d och Kconfig $name Off;done[Email protected]~]# chkconfig–list|grep 3:onCrond 0:off 1:off 2:on 3:on 4:on 5:on 6:offNetwork 0:off 1:off 2:on 3:on 4:on 5:o

Design (29) Oles Online Examination System The online examination system oles is divided into two software for students and teachers. The following is the cover of the software used by the examinee. The cover of the software used by the server-side teacher is similar: Software (client software) used by instructors (or invigilators (Server Software) Control. T

In recent work, we need to design a complete system, including B/S web services and databases, and the C/S structure of the application layer private communication protocol.ProgramModule, involving interaction with external databases and external modules. Because I am really a little bit of a design, and I am not familiar with database and web, after I have

, the main reason for choosing this architecture is simple. And can meet the requirements. Summary This article mainly analyzes agileeas. net Architecture and analysis of the overall architecture design of the pharmacy system, we did not pay attention to some details, the future of more detailed content, will be in the development process . Of course, due to my limited level, some shortco

system already exists, the design of this simple writing can be really simple. There are two similar practices in "loosely coupled programming. One is that the master tells his thoughts to the apprentice (generally using a whiteboard or blank paper), and the apprentice asks the teacher to answer questions, almost until now. On the contrary, the apprentice told t

httpd, we run the make command after the end, go into the 07_httpd folder to view, found that there is no generation httpd this file, detailed see three:Figure three Questions oneWorkaround: Run the make command again to get the prompt "can ' t open output file. /bin/httpd ", you know, in our current 07_HTTPD folder in the parent directory WS does not exist in the Bin folder, so the command is not allowed to enter the WS/BIN/HTTPD path, thus, We chos

This design document was written in March to attend the company's R D summit. I was confident, but I was not shortlisted. Now I think it is useless, so I will post it and look forward to communicating with park friends. The document is a little long and is not all posted on the blog. If you are interested, you can download the PDF file in the attachment. Attachment: " -- System

/** - * Override SetOptions method to complete string splitting to */ + Public void setoptions(String options) { - This. options =options; the This.Optionarr = Stringutil.str2arr (Options, RN); * } $ //other getter and setter methods are omitted.Panax Notoginseng}The basic implementation of the Str2arr () method in the Stringutil tool class is as follows: 1 // 2 public static string[] str2arr (String str, String Tag { 3 if (Validateutil.isvalid