C) Fields: A field is a group of characters or bytes that has some meaning.
Example: Kapil, Ajay, 29, Ram these are the different example of fields like it can be anybody name, age, number etc.
D) Records: Composition of various related fields are called records. eg: kapil+29+male+12000 so in this Kapil is a name 29 is the age where is the gender of Kapil and 12000 is salary. So these are various field and combining this will become records.
E) Files: Combinations of various records is called files.
Example of Files
These are all various records and combining them becomes a file.
F) Database: A database is a collection of information that is organised in such a manner so that it can be assessed, managed and updated in future. A complete diagram of Hierarchy: