Questions and Answers
What is the primary responsibility of the Presentation tier in a 3-tier server architecture?
Displaying user interface components
Which component is responsible for processing business logic in the 3-tier architecture?
Application server
In the context of 3-tier server architecture, what is the primary function of the Database tier?
Storing and managing data
Which layer in a 3-tier architecture is responsible for ensuring the security by storing data securely?
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Why does the separation of tiers in a 3-tier architecture provide stronger security?
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Which component of the 3-tier architecture can be scaled independently based on needs for performance and capacity?
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What is the main purpose of the application tier in a 3-tier server architecture?
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Which component of the ERP system is responsible for CRUD operations?
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In a 3-tier server architecture, what does the database tier primarily ensure?
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What role does the presentation tier play in the ERP system?
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Which component in the 3-tier architecture is responsible for managing physical hardware that stores the database?
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What is a key responsibility of the application tier concerning external systems?
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What is the main function of the presentation tier in a 3-tier architecture?
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In a 3-tier architecture, which tier is responsible for validating user access rights before processing data requests?
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What is the primary role of the application tier in a 3-tier architecture?
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Which tier in a 3-tier architecture processes database queries and updates based on requests received from the application tier?
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Which component is primarily responsible for ensuring data integrity and security in a 3-tier architecture?
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In the context of a 3-tier architecture, which component plays a vital role in managing user authentication and authorization?
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Study Notes
3-Tier System
- The 3-tier system separates software into three layers: presentation tier, application tier, and database tier.
Presentation Tier
- Responsible for user interface components, such as forms and reports.
- Runs on the user's device or web browser.
Application Tier
- Also known as the middle tier.
- Responsible for processing business logic and communicating with the database tier.
- Includes the application server, which runs application code and executes business processes.
- May communicate with external systems or services, such as payment gateways or shipping providers.
Database Tier
- Also known as the data tier.
- Responsible for storing and managing data used by the application tier.
- Includes the database server, which stores data and provides access to it.
- Performs CRUD (create, read, update, delete) operations.
Advantages of 3-Tier System
- Separation of concerns between tiers allows for stronger security.
- Allows for scalability and flexibility.
- Easier maintenance and updates, as changes to one tier do not affect the others.
3-Tier Program Flow
- Presentation tier sends a request to the application tier.
- Application tier processes the request and contacts the database tier if necessary.
- Database tier returns data requested.
- Application tier receives data and returns results to the presentation tier.
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