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    30 Mar 2008
Interview questions for an experienced web developer  
kumar rakesh
create and manage free online surveys with unlimited responses
Online surveys are now basic requirement of everyone who want to review there products or to make studies about anything. But finding a solution who can provide esurveys efficiently is really a big pain. creating an online survey with inefficient tool as irritating and getting survey conducted with limitations on responses is even worse.
cont..
    30 Mar 2008
Interview questions for an experienced web developer  
kumar rakesh
practice interviews and prepare for interviews
in todays changing world every one want to increase there salaries very quickly.
Changes your employer is an very efficient solution for this. But changing employer and company is not so easy.

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    12 Dec 2007
Interview questions for an experienced web developer  
kumar rakesh
His other forums
Interview questions for an experienced web developer
Please read these questions carefully and don't neglect any one. Try to find good answers for all.

I'm putting here questions only at this time.
I'll try to post answers for all of them.

so here comes the questions.....

  1. Stored procedures and triggers
  2. Constraints
  3. Difference between echo and print
  4. difference between echo and print_r
  5. Methods for retrieving data from database
  6. can we define function in function
  7. Syntax of creating class in php
  8. What goes on in php compiler when we creates object of any class
  9. No. of functions you have created in your past experiences
  10. What is the use of COMMIT in mysql queries
more questions coming....
29 Apr 2008
 
kumar rakesh
His other forums
Hey friends, these are the answers for the above mentioned questions.

I'm writing these answers from my experience and from searching/ studying on internet.



1. stored procedures and triggers

    stored procedures are procedures kept in database, which performs a predefined task. keeping procedures in             database instead of in scripts improves performance and also enables us to hide our business logic. But do remember, keeping un-neccessary and so many stored procedures will increase burden on database server and may affect performance of database. Triggers are also same but, one difference between them is that, triggers are called automatically on some database event, while we've to call stored procedures externally, whenever required.



2. Constraints

   
Constraints are put on the records in database. constraints put some compulsions on data to be operated on. for example, foreign_key constraints.



3. difference between echo and print

   echo  do not returns anything while print  returns true/false on success/failure



4. difference between echo and print_r

   
echo can't print arrays while print_r can.



5.Methods for retrieving data from database    There are many methods to retrieve data from database




  1.   mysql_fetch_object()

  2. mysql_fetch_array()

  3. mysql_fetch_assoc()


6. can we define function in function

    In php we can not define function in function



7.Syntax of creating class in php

   
class myclass{

       function __construc(){

        }

       // other functions

    }



8. ???????? don't know Please answer if anybody know

9. No. of functions you have created in your past experiences

       Your personal question. answer carefully, so that you can explain which functions you have created.( even if you have created more, and forgotten)



10. What is the use of COMMIT in mysql queries

    Commit is part of the transaction, commit, rollback method in database

    if you starts a transaction in mysql using transaction begin then after performing operations of this transaction, you can either commit to these changes permanently or can rollback to the previous state.



so commit commits all the changes made in transaction in database permanently.
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