Exam 14: Electronic Commerce and Databases

Explain what Craigslist is and how it works.

Accessing a record in a large file involves at least three disk input/output (I/O) operations.

The selling of retail products to the general public is how most consumers interact with and experience the Web's commercial capabilities.

A standard data DVD holds ____ GB of data.

A ____ is an attribute or combination of attributes that uniquely identifies a tuple.

A(n) ____________________ is a graphical ad, often with animation, placed in a prominent position on a Web page.

Each category of information in a database is called a(n) ____.

In general, issues of personal privacy and public safety are magnified enormously by the capabilities of ____________________ databases.

To the user, distributed databases look like a single database with fast access times, just like data being accessed on the local machine.

A row of the table containing data about one instance of an entity is called a ____.