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DBMS UNIT 1: Theory Questions on Database Approach and Characteristics

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Questions and Answers

What is the main difference between the database approach and traditional file systems?

Database approach relies on flat files, while traditional file systems use relational databases.
Database approach uses a centralized approach to data management, while traditional file systems are decentralized.
Database approach is more prone to data corruption than traditional file systems.
Database approach allows for data independence, while traditional file systems do not. (correct)

Which of the following best defines metadata in a database context?

Metadata refers to the data that is stored in a database.
Metadata is another term for the database schema.
Metadata is data that provides information about other data. (correct)
Metadata is the physical implementation of the database schema.

In a company database, what do relationship constraints define?

Relationship constraints define the rules for updating data in a table.
Relationship constraints define the attributes that must have values in each record.
Relationship constraints define the number of records in a table.
Relationship constraints define how tables are linked in a database. (correct)

What is the purpose of defining weak entity types in a database?

Weak entity types define entities that rely on other entities for identification. (A) Signup and view all the answers

How do entity and attribute differ in a database context?

Entity is a collection of attributes, while attribute describes an entity. (C) Signup and view all the answers

What does Data Independence refer to in database management?

Data Independence refers to the separation of data storage details from application programs. (D) Signup and view all the answers

What is the role of mapping among schemas in database design?

Ensuring consistency and integrity between related schemas (D) Signup and view all the answers

Which of the following best describes structural constraints on relationship types in a database?

They define permissible relationships among entities (A) Signup and view all the answers

What is a weak entity type in a database schema?

An entity whose existence depends on another entity (B) Signup and view all the answers

How does a partial key contribute to the design of a weak entity set?

It provides additional but not sufficient identification for the weak entity set (D) Signup and view all the answers

In the given Banking database scenario, what does it mean for a Customer to have both types of relationship with a bank branch?

The customer can have both account and loan transactions with a branch (C) Signup and view all the answers

What characteristic distinguishes a Manager's role in controlling a department in the database schema?

Overseeing the operations and decision-making processes within a specific department (B) Signup and view all the answers

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