What is an array? What is a disadvantage?

What is the purpose of a record?

What is the definition of serial files?

How are records added to serial files? Where is new data added to(appended)?

How are files searched in serial files? Why is this a disadvantage?

How are records deleted in serial and sequential files?

What is the definition of sequential files?

How are records added to sequential files?

How are records searched in sequential files?

What are indexed sequential files ?

What is the other name for direct access files?