Why do XML and JSON exist?

a.Because formatted information; i.e., information that can easily be read by humans such as HTML web pages and spreadsheets cannot move quickly over the internet.

b.Because with XML and JSON we can include formatting (graphic layout instructions) with the data.

c.Because we needed a way for organizations to exchange information without accessing each other's databases and without having to rely on how data are displayed on a screen.

Why are NoSQL databases becoming popular?

a. Because noSQL databases are faster than relational ones.

b. Because there are lots of applicatons that do not need the full integrity and ACIDity of the relational model.

c. Because NoSQL fits modern programing languages such as Python better than the relational model.

Which of the following can NOT be done in a relational database?

a.full text searching

b.spatial data representation

c.network modeling

d.None of the other answers is correct.

Assume that we have sales data spread over multiple databases at multiple locations. To compute total sales, we ask each of the databases to compute and report their total sales; then we centrally sum those totals into a general total. What is the name for this type of 'distributed computing?'

a.map-reduce

b.normalization

c.sharding

d.key-value computing