Interview questions for Web developer position

1. What’s the difference between primary key and unique key?
2. The Perl script on the site is working slow. What’s your plan of attack?
3. Name several reasons why a Web site would not work entirely.
4. Write an SQL statement that would select only the customers who made multiple orders within a single week.
5. What version control systems do you use?
6. How do you configure the maximum number of processes in Apache?
7. How much memory do you need for Web server app? Describe your logic of calculating this number.
8. What are response codes 302 and 303?
9. How do you delete all files with file extension temp recursively on a Linux box?
10. What Perl tools do you use for coding, testing, debugging?
11. Do you use DHTML and JavaScript? Describe the projects you’ve used them in.