ANS 1 and 2:
ANS 3:
a) Primary Key: It is a unique identifier that uniquely identifies each record in a table. It is needed for
searching the database.
b) Foreign Key: A field in one table that is primary key in another table. With foreign key values we can
build relationships between tables.
c) RDBMS: Relational Database management systems allow data to be grouped into tables and
relationships created between the tables.
d) Referential Integrity: It ensures that the data in a relational database maintains consistency when the
data changes.
e) DBMS: It is a Database management system software tool which allows you to use a computer to
create databases, add, change, and delete data in a database.
f) Table: It consists of records which contain information about a single entity (place, person, or thing)
g) Record: Related fields are grouped together, which makes up one record.
h) Field: A piece of information related to a single entity (place, person, or thing).
i) Relationship: Relationship in a data helps you to combine data from two different tables. Here, each
relationship will consist of fields in two tables with corresponding data.
j) Input Mask: It is set of simple rules that specifies the end users, the format in which the data to be
entered into a field.