How to swap values of two variables without using 3rd variable !
OK,
that's the most asked question when ever i went for an interview. Interviewer asks , can u swap values of two variables without taking 3rd variable ?
I mean, the simplest way to do this job is taking 3 variables
but the thing get tricky when we are asked to not to introduce 3rd variable at all. Here is the code to swap values between two variables without using/introducing 3rd variable, the most asked question in an interview for any kind of programming job !
This script is too small to get notice but it's quite complex and it tells a lot about programmer's logic and ability to solve complex problem.
Other important php job interview questions include
Top PHP interview Questions |
- Difference between require() , include() and include_once() functions
- What is GET & POST, what is difference between the two
- What are global functions in PHP?
- Is php Object oriented?
- Can we submit a form without a submit button
- Why we use hidden variables in forms ?
- How many ways are there to send a value from one page to another page.
- Session and cookies, which is safest and why ?
- What is php safe_mode()
- What is sql injection and how to prevent it ?
- How to get highest value in a column of database table.
- How to get second highest values in a column.
- How to define a constant in PHP
- Name the top 5 php functions we used most !
No comments:
Post a Comment