delphi programmer Tencent QQ php programmer interview questions compiled

As mentioned before:
1. The following questions, except for programming tasks, need to be written on the scratch paper provided to you. Paper is a precious earth resource, please use it sparingly. When there is a corresponding environment, programming tasks will require writing on the computer. If there are no conditions, you can only write on straw paper.
2. Time:
Basic tasks + Advanced tasks + Design tasks = 90 minutes
Programming tasks = 60 minutes
Basic tasks:
1. Please list the UNIX signals you can think of and explain the uses of the signals.
2. Please list all the string search algorithms you can think of and briefly explain them with comments.
３. There is an IP address (192.168.0.1), please write its 32-bit unsigned integer form.
４. Write down all the HTTP return status values ​​you can think of, and explain their uses (for example: returning 404 means the page cannot be found)
Basic task - selection (will get extra points):
1. Draw a few of you The most familiar SERVER-side model comes out (the format is not important, just try to make the picture clear and explain the idea)
Advanced tasks:
1. What is the garbage collection mechanism of PHP?
　Instructions:
　1) If you are familiar with PHP source code, then please start with the source code and answer some questions, you will get extra points
　2) If you are not familiar with PHP source code, then do your best and write more, This includes information obtained using your own programming intuition.
　３) If you are correct, you will get points. If you are wrong, you will not be deducted. If you do not write, you will get no points.
２. Please write the HTTP header and meet the following requirements:
　1) This is a post request
　2) Target: http://www.example.com:8080/test
　3) POST variable:
　　username: test
　 pwd: test2
　 intro: Hello world!
　 4) Contains the following COOKIE information:
　 cur_query: you&me
　 Description:
　 1) If you can’t remember the command word in a certain HTTP protocol, then, unfortunately, this is the use of "Chinese characters" instead.
　2) If you can remember more HTTP protocol command words, then there is always no harm in writing a few more sentences, right?
　３) The most important thing is that you only need to draw the correct "outline" (remember the head printed by tools such as httpwatch? That is the meaning of "outline"), there will also be points, but if you don't even have the "outline" It's a pity if they are all written wrong.
Design tasks:
1. Recently, there are always people harassing our voting module. We need you to design something with voting restrictions. The requirements are as follows:
　1) Require each QQ number (assuming that this QQ number can be represented in UNIT32) 10 Only 5 votes can be cast in this minute.
　2) Our users are very enthusiastic, with an average of about 20 million people voting through this program every day.
　Instructions:
　1) No need to write code, just pictures and text.
　2) For the key logic, please use pictures and codes to express it. This is also a test of your writing ability.
　３) List all the boundary conditions you can think of. This is a test of your comprehensiveness and agility in logical thinking.
　4) For storage, do your best. If you need a storage layer designed by yourself, then describe the implementation of this storage layer clearly in words and pictures. If the design is reasonable, you will get gorgeous bonus points.
Programming tasks:
1. We ran into big trouble. A new missionary annoyed God. God was very angry and asked us to memorize the Bible (bbe.txt) until he said a word, and we had to quickly Answer which line and word position this word is in. I heard that you are an excellent programmer, so please help us complete this impossible task.
　The requirements are as follows:
　1)/myworks/example/bbe.txt, a 98 version English Bible
　2) The input part requirements are as follows: php ./example.php [Word]
　３) The output part is as follows: [Word] 1 ,2 2,4 5,6　means: this word is in 1 row and 2 columns (the second word), 2 rows and 4 columns...
　Instructions:
　1) This text is 4MB huge...
　2) The word Meaning: A string consisting of English letters (upper and lower case) and numbers (0-9)
３) The machine OS provided to you is ubuntu 9.10, the memory is only 1G, and, unfortunately, 700M of it is used for other purposes
　４) Internet access is not allowed for the computer-based exam, but I installed the man document and a reader for reading CHM and PDF. In the CHM folder on the desktop of the computer, there is the corresponding PHP reference manual
　５) The algorithm complexity requirement cannot be Greater than O(N^2) (that is, the square of N)
　6) What? PHP is inefficient and uncomfortable to use. Well, you can do it in other languages. But note: the machine provided to you only has python 2.4/perl 5.8/gcc[g++] 4.1
The above introduces the delphi programmer Tencent QQ PHP programmer interview questions, including the content of delphi programmers. I hope it will be helpful to friends who are interested in PHP tutorials.