system design interview questions and answers

) Select the correct collection type as needed. For example, if you specify a size, we will choose an array instead of a ArrayList. If we want to traverse a map in order of insertion, we need to use TreeMap. If we don't want to repeat, we should use set.(2) Some collection classes allow you to specify the initial capacity, so if we can estimate the number of stored elements, we could use it to avoid re-hashing or resizing.(3) programming based on interfaces, rather than implementation-based prog

TreeMap. If we don't want to repeat, we should use set.(2) Some collection classes allow you to specify the initial capacity, so if we can estimate the number of stored elements, we could use it to avoid re-hashing or resizing.(3) programming based on interfaces, rather than implementation-based programming, allows us to easily change the implementation later.(4) Always use type-safe generics to avoid classcastexception at run time.(5) Using the immutable classes provided by the JDK as key to t

[Finishing]c#. NET common interview questions with Answer (ZT) A friend who is looking for a job may use it. I am not too understand resistance, last week a friend came to me to find a job he tidied up, so I only responsible for posts, the answer to the question to you. --------1. What does object-oriented thinking mainly include? 1 Inherit polymorphic Package//--------2. What is a user Control 2 user contr

Php programmer interview questions and answers Class my_class { Function my_funct ($ my_param) { User_error ("please define me", E_ERROR ); } Function B () { Return 10; } } ?> A. Multiple inheritance B. Interface C. abstract method D. private method E. function overload)7. suppo

The following is an interview question set from Google to see if you can answer it. Many of these questions are open-ended and there are many correct answers, so use your creativity and imagination. 1. How many golf balls can be mounted on a school shuttle? 2. You are reduced to only a coin with a very high thickness (not squashed, but scaled down proportiona

Tags: sql face question SQL exerciseStructure of the tableStudent (s#,sname,sage,ssex) Student tableCourse (c#,cname,t#) timetableSC (s#,c#,score) score tableTeacher (t#,tname) Teacher table 1. Creating the corresponding table CREATE table student (' s# ' int, sname varchar (+), Sage int, s Sex varchar) The following omit 2. Inserting data insert into student Select 1, ' Zhang San ', 18, ' Male ' union ALL select 2, ' John Doe ', 18, ' Male ' Unio n all .... 3. Check the number of all stud

-threaded access to shared resources, due to improper access, usually a thread locked a resource A, but also want to lock resource B, and in another thread, the lock resource B, but also to lock resource A to complete its own operations, two threads want the other's resources, Instead of releasing their own resources, two of threads are waiting for a situation that cannot be performed.Java Network Programming approximate process:UDP programmingSend side:1, create the Socket object constructor Da

115 Java Interview Questions and answers-ultimate list (I), 115 java Object-Oriented Programming (OOP) Java is a computer programming language that supports concurrency, class-based, and object-oriented. The advantages of object-oriented software development are listed below: • Code development is modularized to facilitate maintenance and modification.• Code r

multithreaded programs, multiple threads are executed concurrently to improve the efficiency of the program, and the CPU does not go idle because a thread needs to wait for resources. Multiple threads share heap memory, so creating multiple threads to perform some tasks is better than creating multiple processes. For example, Servlets is better than CGI because Servlets supports multithreading and CGI does not support it.How does the volatile keyword work in Java?When we use the volatile keywor

SQL database Interview Questions and answers (22:52:54) ReprintedBytes Summary of course number of three c courses by Ye Ping Category: Program World Student (S #, Sname, Sage, Ssex) Student table S #: Student ID; Sname: Student name; Sage: Student age; Ssex: Student genderCourse (C #, Cname, T #) curriculum C #, Course No.; Cname: Course name; T #: Instructor No

Today, I read a blog on innovative workshop interview questionsQuestion: ABCDE five-member fishing, sleep, a woke up, threw away one fish, divided the rest into five points, took one, and left; B woke up and threw away one, divide the remaining parts into five portions and take one portion. Then CDE obtains the fish according to the above method. How many fish have they caught? It is interesting that many of the students participate in the solution. I

The answer here is not comprehensive. These questions can be explained from multiple perspectives. Maybe you don't have to give a full answer during the interview, you only need to answer your questions to familiarize the interview examiner with Oracle concepts. 1. Explain the differences between cold backup and hot ba

Java Multithreaded interview questions 1. What is the difference between processes and threads? A process is a stand-alone (self contained) operating environment that can be viewed as a program or an application. A thread is a task that is performed in a process. The Java Runtime environment is a single process that contains different classes and programs. Threads can be called lightweight processes. Thre

20 Linux Command Interview Questions and answersQ: 1. How can I view the running level of the current Linux server? A: the who-r and runlevel commands can be used to view the running level of the current Linux server.Running level:0-downtime (do not set initdefault to 0) 1-Single User Mode 2-multiple users, but there is no NFS3-full multi-user mode 4-5-X116-Restart not used (do not set initdefault to 6) Q:

From: http://www.leezao.cn/article.asp? Id = 465 This article focuses on several common C # And. Net classic interview questions, such as "differences between classes and structures in. Net", and "How many methods of passing values between ASP. NET pages ?", The answer is concise and concise, hoping to help readers who want to learn C # And. net. 　1. What is the difference between classes and structures i

This is my. NET interview question and answer, I hope to be helpful to. NET job seekers, especially to fresh graduates. Use. NET to do b/s structure of the system, you are using several layers of structure to develop, the relationship between each layer and why this layering? From bottom to top: Data access layer, business logic layer (or become domain layer), presentation layerData Access layer: sometimes

This interview questions2344095 (caring)SortAshzs (can contain Chinese characters ))Thank you! 1. There are 14 200 GB disks on the ark, and the database size includes log files. How to set the disk (which indicates how the 14 disks are used )?2. there are two Server Clusters, node1 and node2. Now we need to install win200 system patches. After the patches are completed, we need to restart the

I recently saw a blog post posted by Lao Zhao, "questions I asked during the interview with. Net/C # programmers". I tried to answer this question and I forgot to add it: What is. Net? What is CLI? What is CLR? What is Il? What is JIT and how does it work? What is GC? How does GC work? What is. net Dot Net is a complete set of platforms proposed by Microsoft in 2000, including the underlying operating

Typical questions and answers from Oracle 1. Explanations of differences between cold backup and hot backup and their respective advantages answer: Hot Backup is applicable to databases in archive mode when the database is still working. Cold backup refers to the backup after the database is closed, applicable to all databases. The advantage of hot backup is that the database can still be used during Backup

pointersHow do I understand static variables?One variable is shared by all instances.How many requests can be sent to the server?Get postIf you need to pass variable values in a B/S structure, but you cannot use session, cookie, and application, how can you handle them?Input type = ""URLDatabaseIf. NET is used as a B/S structure system, how many layers of structure do you use to develop the relationship between each layer and why do you need to layer