problem 1:

prepare down differentiation between record and file.

problem 2:

Sketch the hierarchy of data.

problem 3:

prepare down the differentiation between centralized system and decentralized system.

problem 4:

Provide one merit and one drawback of centralized system.

problem 5:

Provide one benefit and one drawback of decentralized system.

problem 6:

What do you understand by the term distributed system?

problem 7:

Provide one benefit and one drawback of distributed system.

problem 8:

What is the distinction between a data definition language (DDL) and a data manipulation language (DML)?