sql interview questions book

I went to a company for an interview in the morning and gave me a question. After 20 minutes, I answered a few questions, but I didn't have enough self-motivation. I don't have many questions. I remember the following: 1 . Two string variables String A, B; program to connect two strings with ASCII StorageFor example: String A = " ABCD " ,

Some time ago, I saw Xiaomi, Baidu, Microsoft and other companies on the Internet have the following interview questions: An array contains 2n + 2 integers, n of which appear twice, and only 2 appear once. You need to write an algorithm (optimal) to find these two unique numbers. My thinking process for solving this problem is as follows: There are two unique numbers in the original question. What if there

Http://zhedahht.blog.163.com/blog/static/254111742007376431815/ Question: If all the characters of string 1 appear in the second string in the order of the strings, then string 1 is called a substring of string 2. Note that the character of a substring (string 1) must appear in string 2 consecutively. Compile a function, enter two strings, calculate their longest public substrings, and print the longest public substrings. For example, if two strings bdcaba and abcbdab are input, and both bcba an

PHP interview questions 1. What methods do you use to solve the traffic issue for websites with large traffic volumes? First, check whether the server hardware is sufficient to support the current traffic. Second, optimize database access. Third, prohibit external leeching. Fourth, control the download of large files. Fifth, use different hosts to distribute major traffic. Sixth, use the traffic analysis an

The company wants to recruit Software testers and has eight interview questions (actually adding a combination for search). This is not necessarily reasonable, but it can screen out some questions that I don't understand. 1. In the past, what have you been engaged in? Which part of the job is best?2. What types of software testing are you familiar? Try to comp

Microsoft Asia Technical Center interview questions 1. Differences between processes and threads.2. Differences between heap and stack.3. How is the memory managed in windows?4. Introduce the security of. NET and. net.5. How does the client access the. NET component to implement web service?6. How does a virtual table in C/C ++ compiler complete it?7. Talk about the com thread model. Then, we will discuss t

This program code has the "IP address forgery" vulnerability. how can this problem be solved? PHP interview questions, including php Basics, mysql, network, and front-end knowledge Php Basics 1. what are the output results of the following php code?$ I = 10; $ N = $ I ++; Echo $ n, $ I ++, ++ $ I 2. what is the difference between include and require?3. the following code is used to determine whether the

Regular Interview Questions and answers by a ribaba Java engineer, Baba java 1. Implementation of Spring AOP and IOC Http://blog.csdn.net/tarena_lixy/article/details/7096114 Http://blog.csdn.net/kiss_vicente/article/details/6901295 Http://blog.csdn.net/it_man/article/details/4402245 2. Distributed message queue and distributed cache Message Queue: RabbitMQ, Kafka Cache System: Redis Http://blog.csdn.net/xia

as 2:32 below, indicates how long the system has been running since the last start.[[email protected] DOWNLOAD] #uptime02:05:22 up 2:32, 2 users, Load average:0.00, 0.00, 0.0014. How to add route in Linux systemHost routingRoute add-host 192.168.197.100 Dev eth0Gateway RoutingRoute add default GW 192.168.197.1Network routingRoute ad-net 192.168.1.0 netmask 255.255.255.0 deveth1Route ad-net 192.168.1.0 netmask 255.255.255.0 gw192.168.197.115. The contents of the known Test.txt file are as follow

This article originates from: http://www.dbasupport.com The answer here is not very comprehensive, these questions can be explained through a number of angles, perhaps you do not have to give a full answer in the interview process, only through your answers to the interviewer to understand your understanding of the Oracle concept. 1. Explain the different points of cold and hot backup and their advantages

Microsoft Asia Technical Center interview questions 1. Differences between processes and threads. A thread is an execution unit in a process and a schedulable entity in the process. Differences from processes: (1) scheduling: A thread is the basic unit of scheduling and allocation, and a process is the basic unit of resource ownership. (2) concurrency: not only can concurrent execution be performed between

1. The difference between the Union and UNION allis to display the results of multiple slelect statements as a whole.The difference is that union automatically compresses duplicate results in multiple result sets (the system automatically removes the duplicate tuples), and union ALL displays all results (preserving duplicate Ganso), whether or not duplicates.Union is inefficient because it is being scanned for duplicate values. If the merge does not intentionally delete duplicate rows, then use

Sian O M engineer interview questions 1. What are the functions of the following Linux commands? Init 0 Chkconfig -- level 3 sendmail on Tar-czvf test.tar.gz ./ Chown-R www: www/usr/local/apache/htdocs/ Ln-s/data2/log/var/log/sina_log/ [-D/data1/logs] mv/data1/logs/data1/logs. old Rsync 192.168.0.200: software.tar.gz. Umount/data0 Rpm-ivh sina. rpm Rpm-qf/bin/ls 2. What software does a Linux Server need t

A company's PHP interview questions 1. what is the output content? 'Echo count ("hello"); '2. what can I explain? 'Private public protected' 3. What is the difference between 'strtotime ("-1 day") strtotime ("yesterday? '4. 'What is output by isset (false? = And =? '5. what is the role of cdn? 6. what is the last 100 lines of a file output in bash? The last 100 lines of PHP native output files? 7. there is

Highlights of PHP interview questions compiled by NLP. PHP Basics 1. find the value of $ a and copy the code as follows: $ ahello; $ bunset ($ B); $ bworld; echo $ a; 2. find the value of $ B and copy the code as follows: $ a1; $ x $ B $ a + PHP Basics 1. evaluate the value of $ The code is as follows: $ A = "hello ";$ B = $;Unset ($ B );$ B = "world ";Echo $; 2. evaluate the value of $ B The code i

Spring, hibernate, struts interview questions, hibernatestruts 1. Is Action thread-safe? If there is no way to ensure the thread security of Action? If yes, explain the reasonNoDeclare local variables, or expand RequestProcessor to create an Action each time, or use scope = "prototype" in spring to manage 2. MVC: analyze how struts implements MVC.M: JavaBean or composed of EJB components or pojoC: Action to

. using the application eventIn an ASP . NET application, you can include a special optional file-theGlobal.asax file, also called an asp . It contains code that responds to application-level events raised by the ASP. NET or HTTP module. Iii. Summary ofapplicationInASP. 2.0in whichApplicationhas become not very important. BecauseApplicationthe self-management function is very weak, it has no similarSessiontime-out mechanism. In other words,Applicationonly manually deleted or modified to free

the Java 5 annotation.Spring's MVC Framework64. What is the Spring MVC framework?Spring provides a full-featured MVC framework for building Web applications. The spring framework can be easily fused with other MVC frameworks (such as struts), which uses the inversion of control (IOC) to separate the controller logic from the business object. It also allows the request parameters to be bound declaratively on the business object.65.DispatcherServletThe Spring MVC Framework is designed around Disp

I. multiple choice questions:1. In ms SQL Server, the stored procedure used to display database information is ()A sp _ dbhelpB sp _ dbC sp _ helpD sp _ helpdb 2. In SQL, the command to delete a table is ()A DELETEB DROPC CLEARD REMORE 3. In relational databases, the primary key is (__)A. It is A unique entity in the identification table.B. Create a unique index

For the PHP interview questions compiled by NLP, from basic to advanced, if you want to apply for a php job, refer. The basic PHP knowledge section is also referenced by recruitment institutions. 1. evaluate the value of $ The code is as follows: $ A = "hello "; $ B = $; Unset ($ B ); $ B = "world "; Echo $; 2. evaluate the value of $ B The code is as follows: $ A = 1; $ X = $; $ B = $ a ++; Echo $