Questions for designing / analytical rounds of product cos

1. How would you go about designing a phone book application for mobile with a limitation on memory?
2. How would you process the log that is being generated by some web application that runs 24/7 and is in gigabytes of size? You need to display the log in sorted format.
3. Design a library management software with tagging facility. Tags may have associated sub tags which should get automatically assigned. A search feature in the same software which may provide facility to search based on tags, author, availability.
One feature of advanced reservation on books.
A feature to impose fine for over due books.
search of members/user based on over due frequency, fine amount, number of books issued etc..
4. How to design a distributed system with efficient throughput time?
5. What parameters should be taken into account for designing a distributed application with probably a million of users?
6. How would you go about designing a self update system which has say 10 different sources of information, all source being web server and has relevant web services and APIs for information retrieval?
7. How to design a car parking system?
8. How to design a traffic system?
9. How would solve a problem if you were to find out how many movie tickets were sold today in Bangalore?
10. How do you beak a system say a web application. In how many ways and how do you use if you gain sensitive information.

..... more will be added