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http://antontw.blogspot.com/2008/02/yahoo_19.html

1. What is difference between GET/POST?
Ans:

GET method put a long url string to web server. It is simple to be used by click and click but the content is limited and the value is easily effected by the browser.

POST method can handle data with multiple types, and CGI reads data stream from stdin as long as it posts data. However, it is so convenient and direcy just like GET.

2. How do you keep state using Web forms?
Ans:



3. Given a line of text $string, how do you use "regular expression" to strip all html tags from it?
Ans:

#!/usr/bin/php
preg_replace("/<[^>]*>/","",$string);


4. Describe UNIX IPC's ?
Ans:


Ans:

#include "stdio.h"
#include "string.h"

void
ReverseWord(char *begin,char *end)
{
if ((begin==NULL) || (end==NULL)) return;
if (end < begin) return;
char *q = begin;
char *p = end;
char c;
while(q < p)
{
c = *q;
*q = *p;
*p = c;
q++;
p--;
}
}

int
main()
{
char str[] = "This is a test";
ReverseWord(str, str+(strlen(str)-1));
char *p,*q;
p = q = str;
while(*p!=0)
{
if (*p==' ')
{
ReverseWord(q,p - 1);
while((*p==' ')&&(*p!=0))
p ++;
if (*p!=0)
{
q = p;
p++;
}
} else {
p++;
}
}
ReverseWord(q,p - 1);
printf("%s\n",str);
return 0;
}



6. In C, please write a program to print out an integer number 12345 without using printf?
Ans:

  fprintf(stdout, "%d\n", 12345);


7. Given an array in

PHP :

$ list = array('apple'=>300, 'orange'=>150, 'banana'=>100, 'mango'=>330)

Perl :

%list = ( 'apple'=>300, 'orange'=>150, 'banana'=>100, 'mango'=>330 ) ;

C++:

typdef map< string, int, less> array_type ;

array_type m;

m.insert(array_type::value_type("apple", 300));

m.insert(array_type::value_type("orange", 150));

m.insert(array_type::value_type("banana", 100));

m.insert(array_type::value_type("mango", 330));

Please choose one language above and write a programe to sort the array by

the order of key and value respectively with your own sorting algorithm.

Please don't use the sorting functions provided by language.

Ans:
  // vim:set fdm=indent ts=2 ai et sts=2 sw=2 tw=0:
function myarray_remove($list,$key)
{
$orig = $list;
$len = count($list);
$i=0;
foreach ($list as $k => $v)
{
if ($k==$key) { $tk=$k; $ti=$i; }
$i++;
}
$temp = array_merge(array_slice($orig,0,$ti),array_slice($list,$ti+1,$len-$ti-1));
return $temp;
}

function value_get_biggest($list,$sortbyvalue=true)
{
foreach ($list as $k => $v)
{
if (!$sortbyvalue)
{
if (ord($k)>ord($tk))
{
$tv = $v;
$tk = $k;
}
} else {
if ($v>$tv)
{
$tv = $v;
$tk = $k;
}
}
}
return array($tk=>$tv);
}

function mergesort($list,$sortbyvalue)
{
$one = value_get_biggest($list,$sortbyvalue);
$list = myarray_remove($list,key($one));
if (count($list)>0)
{
$temp = mergesort($list,$sortbyvalue);
$temp = $temp + $one;
return $temp;
} else {
return array(key($one)=>$one[key($one)]);
}
}

$list=array('apple'=>300, 'orange'=>150, 'banana'=>100, 'mango'=>330);
$list = mergesort($list,false);
print_r($list);



8. What sort of things do you need to worry about from a security perspective when writing a web application?
Ans:


 (0) Think before we leap.

(1) Make it simple and stupid.

(2) Version Control
It is not easy to find out where bugs begin at the first time, but it is easy to know what we did by the version control.

(3) Review, Monitor and Update


--
※ 作者: rikaka 時間: 2012-03-27 14:21:00
※ 編輯: rikaka 時間: 2012-03-27 16:49:33