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 design pattern is commonly associated with Event-Driven Architecture?
- A. Observer Pattern
- B. Singleton Pattern
- C. Factory Pattern
- D. Decorator Pattern
Explanation
Answer: Observer Pattern The Observer Pattern is commonly associated with Event-Driven Architecture. It enables a one-to-many dependency between objects, ensuring that when one object changes state, all its dependents are notified and updated automatically.
How does Event-Driven Architecture handle asynchronous communication?
- A. Components communicate without waiting for a response, allowing them to continue processing
- B. Components always wait for a synchronous response before proceeding
- C. Components send messages sequentially, waiting for each to be processed
- D. Components communicate only through direct function calls
Explanation
Answer: Components communicate without waiting for a response, allowing them to continue processing Event-Driven Architecture handles asynchronous communication by allowing components to communicate without waiting for a response. This enables efficient parallel processing and responsiveness in the system.
What are some common challenges in implementing Event-Driven Architecture at scale?
- A. Scalability, Event ordering, Debugging complexity, Synchronous communication
- B. Message delivery, Asynchronous communication, Event-driven design, Fault tolerance
- C. Event-driven design, Message delivery, Synchronous communication, Fault tolerance
- D. Debugging complexity, Scalability, Asynchronous communication, Event ordering
Explanation
Answer: Scalability, Event ordering, Debugging complexity, Synchronous communication Challenges in implementing Event-Driven Architecture at scale include managing scalability, ensuring proper event ordering, handling debugging complexity, and addressing issues with synchronous communication.
How does Event-Driven Architecture contribute to system scalability?
- A. By enabling loose coupling between components, By introducing synchronous communication, By reducing fault tolerance, By limiting data flow between services
- B. By enabling loose coupling between components, By introducing asynchronous communication, By reducing fault tolerance, By limiting data flow between services
- C. By enforcing tight coupling between components, By introducing synchronous communication, By enhancing fault tolerance, By increasing data flow between services
- D. By enforcing tight coupling between components, By introducing asynchronous communication, By enhancing fault tolerance, By increasing data flow between services
Explanation
Answer: By enabling loose coupling between components, By introducing asynchronous communication, By reducing fault tolerance, By limiting data flow between services Event-Driven Architecture contributes to system scalability by enabling loose coupling between components and introducing asynchronous communication, allowing for better handling of increased workloads.
Which technologies are commonly used for event sourcing in Event-Driven Architecture?
- A. SQL databases, Redis, Cassandra, Kafka
- B. MongoDB, RabbitMQ, PostgreSQL, Amazon S3
- C. Kafka, Apache Flink, Apache Pulsar, Redis Streams
- D. MySQL, Apache Kafka, Apache Cassandra, AWS Lambda
Explanation
Answer: Kafka, Apache Flink, Apache Pulsar, Redis Streams Event sourcing in Event-Driven Architecture commonly utilizes technologies such as Kafka, Apache Flink, Apache Pulsar, and Redis Streams to store and manage event data efficiently.
In Event-Driven Architecture, events are typically transmitted through a _________.
- A. Message Queue
- B. Direct HTTP Calls
- C. Database
- D. Shared Memory
Explanation
Answer: Message Queue Events in Event-Driven Architecture are often transmitted through a Message Queue, facilitating asynchronous communication and decoupling components.
A key advantage of Event-Driven Architecture is its ability to decouple _________.
- A. Components
- B. Modules
- C. Layers
- D. Dependencies
Explanation
Answer: Dependencies Event-Driven Architecture excels in decoupling dependencies, allowing components to operate independently and reducing tight coupling between various parts of a system.
_________ is a pattern where events are persisted as a sequence of immutable records.
- A. Event Sourcing
- B. Caching
- C. Load Balancing
- D. Replication
Explanation
Answer: Event Sourcing Event Sourcing is a pattern where events are persisted as an immutable sequence. This ensures a reliable record of events and simplifies tracking changes in a system.
_________ is a design principle in Event-Driven Architecture where components are only aware of the events they are interested in.
- A. Loose coupling
- B. Tight coupling
- C. Cohesion
- D. Coupling
Explanation
Answer: Loose coupling Loose coupling is a design principle in Event-Driven Architecture, emphasizing that components should be unaware of each other, only focusing on the events they are interested in. This enhances flexibility and maintainability.
_________ is a technique used in Event-Driven Architecture to ensure reliable event delivery.
- A. Event Queue
- B. Event Loop
- C. Event Broker
- D. Event Handler
Explanation
Answer: Event Broker Event Broker is a technique in Event-Driven Architecture that ensures reliable event delivery. It acts as an intermediary, facilitating communication between components without direct dependencies.
In Event-Driven Architecture, _________ is often used for real-time data processing and analytics.
- A. Publish-Subscribe
- B. Request-Response
- C. Point-to-Point
- D. Broadcast
Explanation
Answer: Publish-Subscribe Publish-Subscribe is commonly used in Event-Driven Architecture for real-time data processing and analytics. It allows multiple components to subscribe to relevant events, promoting efficient communication.
In a scenario where a financial trading platform needs to process a large volume of transactions in real-time, how would Event-Driven Architecture facilitate this requirement?
- A. Enabling asynchronous communication between components
- B. Ensuring a monolithic architecture for stability
- C. Implementing a polling mechanism for data retrieval
- D. Prioritizing synchronous communication for instant responses
Explanation
Answer: Enabling asynchronous communication between components Event-Driven Architecture facilitates real-time processing by allowing asynchronous communication between components. This enables efficient handling of a large volume of transactions without blocking the system.
In a healthcare system where various devices generate patient data continuously, how can Event-Driven Architecture support real-time monitoring and analysis?
- A. Using event queues to buffer and manage incoming data
- B. Adopting a request-response pattern for data retrieval
- C. Implementing a strictly synchronous communication model
- D. Relying solely on batch processing for data analysis
Explanation
Answer: Using event queues to buffer and manage incoming data Event-Driven Architecture supports real-time monitoring and analysis in healthcare systems by using event queues to buffer and manage continuously generated patient data, ensuring timely processing and response.
A logistics company wants to implement a system that reacts to changes in delivery statuses in real-time. How would Event-Driven Architecture enable this functionality?
- A. Broadcasting events when delivery statuses change
- B. Implementing a centralized status checking service
- C. Utilizing a strictly request-response communication
- D. Storing delivery status changes in a relational database
Explanation
Answer: Broadcasting events when delivery statuses change Event-Driven Architecture enables real-time reactions to changes in delivery statuses by broadcasting events when these changes occur. This allows other components to react promptly to the updated information.
What is Service-Oriented Architecture (SOA) primarily focused on?
- A. Organizing software as a collection of services
- B. Maximizing hardware utilization
- C. Minimizing network latency
- D. Prioritizing front-end development
Explanation
Answer: Organizing software as a collection of services SOA focuses on organizing software as a collection of services, where each service represents a discrete business functionality. This promotes modularity and flexibility in system design.
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.
