Why DBMS replaced file-based systems - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Why is data redundancy a problem in file-based systems?

File-based systems often store the same data in multiple places. Why is this a problem?

A It reduces the need for data backups.

B It makes data retrieval faster and more efficient.

C It improves data security by having multiple copies.

D It causes data inconsistency and wastes storage space.

💡 Hint

Think about what happens if one copy of data is changed but others are not.

Storing the same data multiple times can lead to inconsistencies if updates are not synchronized. It also uses more storage than necessary.

📋 Factual

intermediate

Which feature of DBMS helps avoid data inconsistency?

What feature of a Database Management System helps prevent data inconsistency that is common in file-based systems?

A Centralized data management

B Multiple file storage

C Manual data entry

D Separate data files for each user

💡 Hint

Consider how controlling data in one place affects consistency.

DBMS centralizes data storage and management, ensuring all users access the same updated data, reducing inconsistency.

🚀 Application

advanced

How does DBMS improve data security compared to file-based systems?

Choose the option that best explains how DBMS enhances data security over file-based systems.

A By avoiding backups to prevent data leaks.

B By storing data in multiple unprotected files.

C By allowing controlled access through user permissions and roles.

D By letting all users freely edit any file.

💡 Hint

Think about how access control can protect data.

DBMS provides user authentication and authorization, so only permitted users can access or modify data, improving security.

🔍 Analysis

advanced

What is a key advantage of DBMS in data sharing over file-based systems?

Analyze the following statements and select the one that best describes how DBMS improves data sharing compared to file-based systems.

A File-based systems allow better simultaneous access by multiple users.

B DBMS allows multiple users to access data concurrently without conflicts.

C DBMS restricts data access to one user at a time to avoid errors.

D File-based systems automatically synchronize data among users.

💡 Hint

Consider how DBMS handles multiple users working with the same data.

DBMS supports concurrent access with mechanisms like locking and transactions to prevent conflicts, unlike file-based systems.

❓ Reasoning

expert

Why does DBMS provide better data independence than file-based systems?

Data independence means changes in data structure do not affect application programs. Why is this better achieved in DBMS?

A Because DBMS separates data storage from application logic using schemas.

B Because file-based systems store data and programs together in one file.

C Because DBMS requires rewriting all programs when data changes.

D Because file-based systems use a central schema to manage data.

💡 Hint

Think about how DBMS uses a data model to isolate data from programs.

DBMS uses schemas to define data separately from programs, so changes in data structure do not require program changes, unlike file-based systems.