System Design
15 questions — answer mentally, then read the explanations
What you'll learn
- Try to answer each question before reading the explanation
- Cover System Design topics in system design
Questions
Read each question and options, then check the explanation below.
A multinational corporation with diverse business units wants to adopt Service-Oriented Architecture to streamline its IT operations. What challenges might they face during the transition, and how can they address them?
- A. Integration Complexity
- B. Standardization Difficulties
- C. Increased Latency
- D. All of the Above
Explanation
Answer: All of the Above Adopting Service-Oriented Architecture (SOA) can pose challenges like integration complexity, standardization difficulties, and increased latency. Addressing these challenges requires careful planning, standardized protocols, and effective communication across business units.
A software development company is considering implementing microservices architecture vs. Service-Oriented Architecture for its new product. What factors should they consider when making this decision, and how would each approach impact scalability and maintainability?
- A. Factors: Size of the Project, Team Expertise, Deployment Complexity
- B. Microservices: Granular Scaling, Independent Deployability
- C. Service-Oriented: Centralized Governance, ESB Usage
- D. Both: Scalability Challenges
Explanation
Answer: Microservices: Granular Scaling, Independent Deployability Factors such as the size of the project, team expertise, and deployment complexity should be considered. Microservices offer granular scaling and independent deployability, while Service-Oriented Architecture provides centralized governance and may involve the use of Enterprise Service Bus (ESB).
What does layered architecture refer to in system design?
- A. Organizing system components into horizontal layers
- B. Distributing system components across multiple servers
- C. Arranging system components in a vertical structure
- D. Combining all system components into a single layer
Explanation
Answer: Organizing system components into horizontal layers Layered architecture involves organizing system components into horizontal layers, facilitating modularity and separation of concerns. Each layer performs a specific set of functions, promoting maintainability and scalability.
Which of the following is a characteristic of layered architecture?
- A. Tight coupling between layers
- B. Loose coupling between layers
- C. No communication between layers
- D. Random coupling between layers
Explanation
Answer: Loose coupling between layers Layered architecture promotes loose coupling between layers. This means that each layer is relatively independent, making it easier to modify or replace one layer without affecting others. Loose coupling enhances flexibility and maintainability.
What is the primary benefit of using a layered architecture in software development?
- A. Improved performance
- B. Reduced development time
- C. Enhanced security
- D. Modular and maintainable design
Explanation
Answer: Modular and maintainable design The primary benefit of layered architecture is achieving a modular and maintainable design. Each layer has a specific responsibility, making it easier to understand, update, and scale the system. This structure enhances long-term maintainability.
In a layered architecture, what does the presentation layer primarily handle?
- A. User interface and interaction
- B. Data storage and retrieval
- C. Business logic
- D. Communication between layers
Explanation
Answer: User interface and interaction The presentation layer primarily handles the user interface and interaction, ensuring the proper display of information and capturing user input. It focuses on the front-end aspects of the system.
What is a common disadvantage of layered architecture?
- A. Increased complexity and overhead
- B. Improved modularity and maintainability
- C. Enhanced scalability
- D. Reduced communication between layers
Explanation
Answer: Increased complexity and overhead A common disadvantage of layered architecture is increased complexity and overhead. While it offers modularity and maintainability, managing communication between layers can become challenging.
Which layer in a layered architecture is responsible for data storage and retrieval?
- A. Presentation Layer
- B. Business Logic Layer
- C. Data Access Layer
- D. Application Layer
Explanation
Answer: Data Access Layer The Data Access Layer is responsible for data storage and retrieval. It manages interactions with the database, abstracting the details of data manipulation from the higher layers.
How does layered architecture promote modifiability and maintainability?
- A. By isolating components into distinct layers with well-defined interfaces
- B. By minimizing the number of layers to reduce complexity
- C. By tightly coupling all components for better communication
- D. By allowing components to access any layer directly
Explanation
Answer: By isolating components into distinct layers with well-defined interfaces Layered architecture promotes modifiability and maintainability by isolating components into distinct layers with well-defined interfaces. This separation facilitates changes in one layer without affecting others, making it easier to modify and maintain the system.
In a layered architecture, how are layers typically organized?
- A. Sequentially, with each layer performing a specific set of functions
- B. Randomly, with no specific order
- C. Hierarchically, with higher layers depending on lower layers
- D. Independently, with each layer working in isolation
Explanation
Answer: Hierarchically, with higher layers depending on lower layers Layers in a layered architecture are typically organized hierarchically, with higher layers depending on lower layers. This organization provides a clear structure and ensures that each layer has a specific responsibility in the system.
Which design principle does layered architecture closely align with?
- A. Separation of Concerns
- B. Don't Repeat Yourself (DRY)
- C. Keep It Simple, Stupid (KISS)
- D. Least Astonishment Principle
Explanation
Answer: Separation of Concerns Layered architecture closely aligns with the design principle of "Separation of Concerns." It emphasizes isolating different aspects of the system into distinct layers, promoting modularization and making the system more comprehensible and maintainable.
The _________ layer in a layered architecture interacts directly with the end user.
- A. Presentation
- B. Business
- C. Data
- D. Application
Explanation
Answer: Presentation The Presentation layer in a layered architecture interacts directly with the end user. It is responsible for presenting information to users and capturing their input.
In a layered architecture, the _________ layer often contains business logic and rules.
- A. Presentation
- B. Business
- C. Data
- D. Application
Explanation
Answer: Data In a layered architecture, the Application layer often contains business logic and rules. This layer manages the application's functionality, processing user inputs, and coordinating the application's overall behavior.
_________ is a common challenge in layered architecture where changes in one layer may necessitate changes in other layers.
- A. Coupling
- B. Cohesion
- C. Abstraction
- D. Encapsulation
Explanation
Answer: Coupling Coupling is a common challenge in layered architecture where changes in one layer may necessitate changes in other layers. Tight coupling between layers can make the system less flexible and harder to maintain.
_________ is a design anti-pattern that can emerge in layered architecture when layers become tightly coupled.
- A. Tight Coupling
- B. Loose Coupling
- C. Strong Coupling
- D. Weak Coupling
Explanation
Answer: Tight Coupling Tight coupling in a layered architecture is considered a design anti-pattern. It occurs when layers become interdependent, making it challenging to modify or replace one layer without affecting others.
Today's exercise: Review & recall
Revisit any questions you hesitated on. Write one-line answers in your own words.
Steps
- 1
First pass
Read each question and pick an answer without looking at the explanation.
- 2
Second pass
Expand explanations only for questions you missed or were unsure about.
- 3
Notes
Jot down 3 terms or patterns you want to remember from this batch.
