1. List the types of approaches used in recommendation engines. 2. How do the two approaches differ? 3. Can you identify specific sites that may use one or another type of recommendation system? 4....

1. List the types of approaches used in recommendation engines.

2. How do the two approaches differ?

3. Can you identify specific sites that may use one or another type of recommendation system?

4. Define Web 2.0.

5. List the major characteristics of Web 2.0.

6. What new business model has emerged from Web 2.0?

7. Define social network.

8. List some major social network sites.