What are the different Types of DBMS Architecture?
Explores Single-tier, Two-tier, and Three-tier architectures in database systems.
Why Interviewers Ask This
Architecture impacts scalability and security. Interviewers assess your ability to design systems that separate concerns effectively.
How to Answer This Question
Define Single-tier (client-server embedded), Two-tier (client-database), and Three-tier (client-app-server). Explain the role of the middle tier in business logic. Discuss advantages like scalability and security in three-tier models.
Key Points to Cover
- Tier definitions
- Separation of concerns
- Scalability benefits
- Security improvements
Sample Answer
DBMS architectures include Single-tier where the DB is on the client, Two-tier with direct client-to-database connection, and Three-tier separating presentation, application, and data layers. Three-tier is preferred for enterprise apps as it enhances security, scalability, and maintainability by isolating business logic from the database.
Common Mistakes to Avoid
- Confusing tiers with layers
- Ignoring the middle tier role
- Failing to mention scalability
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