Boolean Dreams

Are you looking for PHP,MySQL,Javascript,Web related answers?
Have you faced difficult questions in your interview?
Are you planning for certification exams and you have questions unanswered?
do you want to correct your reasoning?
Then add questions to this post and you can add as many questions as you want. Every week I will answer or compile the answer for [...]

In web development, we do face the issue of running a query few thousands to million times everyday. If your website traffic is small then the impact of such queries is not noticed. but if your site attracts lots of users and the query requires to run a good number of time, it might hurt [...]