prepare down differentiation between record and file.
Sketch the hierarchy of data.
prepare down the differentiation between centralized system and decentralized system.
Provide one merit and one drawback of centralized system.
Provide one benefit and one drawback of decentralized system.
What do you understand by the term distributed system?
Provide one benefit and one drawback of distributed system.
What is the distinction between a data definition language (DDL) and a data manipulation language (DML)?