MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -An entity in DBMS is used to represent any real-world object, while an entity set in DBMS is a set or collection of entities of similar types. In relational models, i.e., the tabular representation to represent data, each row in a table is a separate entity while the whole table is an entity set.

Detailed explanation-2: -In a well-designed database, each table stores data about a particular subject, such as employees or products. A table has records (rows) and fields (columns). Fields have different types of data, such as text, numbers, dates, and hyperlinks.

Detailed explanation-3: -The complete picture of data stored in database is known as Schema. The database schema of a database system is its structure described in a formal language supported by the database management system (DBMS).

Detailed explanation-4: -Entities are stored in tables in databases. Each table will contain an entity set or a list of all those entities which are considered similar. For instance, in a university database, the students might be in one table, the staff in another.