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.
Which architectural pattern emphasizes the use of loosely coupled, reusable software components?
- A. Microservices
- B. Monolithic
- C. Event-Driven
- D. Distributed
Explanation
Answer: Microservices The Microservices architectural pattern emphasizes loosely coupled, reusable software components, often organized around business capabilities. It promotes scalability and ease of maintenance.
Which of the following is NOT a characteristic of Service-Oriented Architecture?
- A. Tight coupling between services
- B. Interoperability
- C. Reusability
- D. Discoverability
Explanation
Answer: Tight coupling between services Tight coupling between services is NOT a characteristic of SOA. SOA emphasizes loose coupling to enhance flexibility, scalability, and the ability to replace or upgrade individual services without affecting the entire system.
In SOA, what is the role of a service?
- A. Providing a physical server
- B. Representing a business functionality with well-defined interfaces
- C. Managing network connections
- D. Storing data in a database
Explanation
Answer: Representing a business functionality with well-defined interfaces In Service-Oriented Architecture (SOA), a service plays the role of representing a business functionality with well-defined interfaces. It encapsulates the business logic and can be accessed by other services or applications.
Which technology is commonly used for communication between services in a Service-Oriented Architecture?
- A. HTTP
- B. SMTP
- C. FTP
- D. Telnet
Explanation
Answer: HTTP HTTP (Hypertext Transfer Protocol) is commonly used for communication between services in a Service-Oriented Architecture (SOA). It provides a standard for data exchange and interaction between distributed systems.
Which design principle of SOA emphasizes the autonomy of services and encapsulation of their business logic?
- A. Separation of Concerns
- B. Loose Coupling
- C. High Cohesion
- D. Encapsulation
Explanation
Answer: Encapsulation Encapsulation is the design principle of SOA that emphasizes the autonomy of services and encapsulation of their business logic. It involves bundling the data and methods that operate on the data into a single unit.
What are the potential challenges of implementing Service-Oriented Architecture in large-scale systems?
- A. Increased complexity
- B. Improved performance
- C. Reduced points of failure
- D. Enhanced security
Explanation
Answer: Increased complexity Implementing Service-Oriented Architecture (SOA) in large-scale systems can introduce increased complexity due to the need for managing distributed services, communication, and dependencies.
How does Service-Oriented Architecture contribute to scalability and flexibility in system design?
- A. By promoting loose coupling between services
- B. By enforcing tight integration between services
- C. By limiting the use of APIs
- D. By relying solely on monolithic architecture
Explanation
Answer: By promoting loose coupling between services Service-Oriented Architecture (SOA) contributes to scalability and flexibility by promoting loose coupling between services. This allows for easier modification and scalability without affecting the entire system.
Which approach is commonly used for versioning services in a Service-Oriented Architecture?
- A. URL versioning
- B. Header versioning
- C. Query parameter versioning
- D. Body versioning
Explanation
Answer: URL versioning URL versioning is a common approach for versioning services in Service-Oriented Architecture. It involves including the version number in the URL to ensure backward compatibility and smooth transitions when updating services.
In Service-Oriented Architecture, _________ are designed to provide specific functionalities and can be invoked by other services.
- A. Web services
- B. Microservices
- C. API gateways
- D. Database servers
Explanation
Answer: Web services In Service-Oriented Architecture (SOA), web services are designed to provide specific functionalities and can be invoked by other services. They enable interoperability and communication between different components.
A key benefit of Service-Oriented Architecture is ___________, allowing for the reuse of existing services to build new applications.
- A. Modularity
- B. Scalability
- C. Centralization
- D. Monolithicity
Explanation
Answer: Modularity A key benefit of Service-Oriented Architecture (SOA) is modularity, which allows for the reuse of existing services to build new applications. This enhances flexibility and maintainability in the system.
Service-Oriented Architecture promotes ___________ by allowing services to evolve independently without affecting other components.
- A. Interoperability
- B. Decoupling
- C. Centralization
- D. Monolithic architecture
Explanation
Answer: Decoupling SOA promotes decoupling by allowing services to evolve independently without affecting other components. This independence enhances system flexibility and makes it easier to update or replace individual services.
___________ is a protocol commonly used for service communication in Service-Oriented Architecture, providing standards for message format and delivery.
- A. REST
- B. SOAP
- C. GraphQL
- D. JSON-RPC
Explanation
Answer: SOAP SOAP (Simple Object Access Protocol) is a protocol commonly used for service communication in Service-Oriented Architecture. It defines standards for message format, structure, and delivery, making it a robust choice for inter-service communication.
One of the key principles of Service-Oriented Architecture is ___________, which involves defining contracts that specify the interactions between services.
- A. Decentralization
- B. Loose coupling
- C. Tight coupling
- D. Encapsulation
Explanation
Answer: Loose coupling One of the key principles of Service-Oriented Architecture is loose coupling. This principle involves defining contracts that specify the interactions between services in a way that minimizes dependencies, allowing for flexibility and maintainability.
___________ is a design pattern used to handle distributed transactions across multiple services in a Service-Oriented Architecture.
- A. Microservices
- B. Event Sourcing
- C. Saga Pattern
- D. Monolithic Architecture
Explanation
Answer: Saga Pattern The Saga Pattern is a design pattern used to handle distributed transactions across multiple services in a Service-Oriented Architecture. It breaks down a transaction into a series of smaller, independent steps or events, ensuring consistency in a distributed environment.
In a scenario where a company wants to modernize its legacy systems and improve interoperability between different departments, which architectural approach would you recommend, and why?
- A. Event-Driven Architecture
- B. Microservices Architecture
- C. Service-Oriented Architecture
- D. Monolithic Architecture
Explanation
Answer: Service-Oriented Architecture Service-Oriented Architecture (SOA) is recommended for improving interoperability between different departments in a company. SOA facilitates the creation of loosely coupled services, allowing for better communication and integration between legacy systems.
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.
