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ANSWER THE FOLLOWING QUESTIONS: 4. A desktop on the screen is an example of which of the three metaphors used to describe human-computer interaction?

ANSWER THE FOLLOWING QUESTIONS:

 

4. A desktop on the screen is an example of which of the three metaphors used to describe human-computer interaction?

 

2. What is a database schema? What information does it contain?

 

14. What is relational database normalization? Why is a database schema in third normal form considered to be of higher quality than a non-normalized database schema?

 

21.  What is the purpose of database synchronization for a replicated database?

 

22. What are the advantages and disadvantages of replicated databases?

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