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.
In an e-commerce platform, what role does content delivery networks (CDNs) play in enhancing performance?
- A. Improving server security
- B. Accelerating website load times by caching and delivering content from nearby servers
- C. Managing user authentication
- D. Optimizing database queries
Explanation
Answer: Accelerating website load times by caching and delivering content from nearby servers CDNs enhance performance by caching and delivering content from servers geographically closer to users, reducing latency and accelerating website load times.
How can data partitioning be utilized to improve scalability in the product catalog of an e-commerce website?
- A. Storing the entire product catalog on a single server
- B. Distributing product information across multiple servers based on specific criteria
- C. Using a single database for all product data
- D. Replicating the product catalog on each server
Explanation
Answer: Distributing product information across multiple servers based on specific criteria Data partitioning involves distributing product information across multiple servers based on specific criteria, improving scalability by reducing the load on individual servers.
Which messaging system is often used for handling real-time inventory updates in an e-commerce platform?
- A. Simple Queue Service (SQS)
- B. Apache Kafka
- C. RabbitMQ
- D. ActiveMQ
Explanation
Answer: Apache Kafka Apache Kafka is often used for handling real-time inventory updates in an e-commerce platform due to its high-throughput, fault tolerance, and scalability.
_________ is a technique used to optimize search functionality in e-commerce platforms by precomputing search results.
- A. Caching
- B. Sharding
- C. Indexing
- D. Load Balancing
Explanation
Answer: Indexing Indexing is a technique that involves creating data structures to improve the speed of data retrieval operations. In the context of e-commerce search optimization, precomputing search results using indexing can significantly enhance search functionality.
Implementing _________ can help e-commerce systems handle sudden increases in traffic by distributing load across multiple servers.
- A. Caching
- B. Sharding
- C. Indexing
- D. Load Balancing
Explanation
Answer: Load Balancing Load balancing is a technique that involves distributing incoming network traffic across multiple servers. In e-commerce systems, implementing load balancing can help handle sudden increases in traffic by ensuring even distribution of requests, preventing any single server from becoming a bottleneck.
_________ is a database optimization technique used to reduce redundancy and improve data consistency in e-commerce databases.
- A. Caching
- B. Sharding
- C. Normalization
- D. Denormalization
Explanation
Answer: Normalization Normalization is a database optimization technique that involves organizing data to reduce redundancy and improve data consistency. In e-commerce databases, normalization can enhance efficiency and maintain data integrity by minimizing duplicate information.
_________ is a design principle in e-commerce systems that ensures consistent user experience across different devices.
- A. Responsive Design
- B. Cross-browser Compatibility
- C. Adaptive Design
- D. Mobile Optimization
Explanation
Answer: Responsive Design Responsive design is a crucial design principle in e-commerce, ensuring that the user experience remains consistent and visually appealing across various devices, such as desktops, tablets, and smartphones.
_________ is a strategy used to personalize product recommendations in e-commerce platforms based on user behavior.
- A. Collaborative Filtering
- B. Content Filtering
- C. Item-Based Filtering
- D. Hybrid Filtering
Explanation
Answer: Collaborative Filtering Collaborative filtering is a popular strategy in e-commerce for personalizing product recommendations. It analyzes user behavior and preferences to suggest items based on similarities with other users.
Implementing _________ can help mitigate the risk of data breaches and ensure compliance with regulations in e-commerce systems.
- A. Two-Factor Authentication
- B. Encryption
- C. Firewalls
- D. Intrusion Detection Systems
Explanation
Answer: Encryption Implementing encryption is crucial in e-commerce systems to protect sensitive data. It helps mitigate the risk of data breaches, ensuring that information remains secure and aids in compliance with regulations.
In a scenario where an e-commerce platform experiences a sudden surge in traffic due to a flash sale event, which scaling strategy would be most effective in handling the increased load while maintaining performance and availability?
- A. Horizontal Scaling
- B. Vertical Scaling
- C. Auto Scaling
- D. Manual Scaling
Explanation
Answer: Auto Scaling Auto Scaling is the most effective strategy for handling sudden surges in traffic. It automatically adjusts the number of resources based on demand, ensuring optimal performance and availability during peak times.
In a situation where an e-commerce platform needs to handle a large number of concurrent transactions during peak hours, which database technology would be most suitable for ensuring transactional integrity and high availability?
- A. SQL Database
- B. NoSQL Database
- C. NewSQL Database
- D. Graph Database
Explanation
Answer: NoSQL Database NoSQL databases are most suitable for handling large volumes of concurrent transactions with high availability and transactional integrity. They offer flexibility and scalability, making them ideal for e-commerce platforms experiencing peak loads.
A popular e-commerce platform is expanding globally and needs to support multiple currencies and languages. Which architectural pattern would best accommodate these requirements while maintaining scalability and flexibility?
- A. Microservices
- B. Monolithic Architecture
- C. Service-Oriented Architecture (SOA)
- D. Event-Driven Architecture
Explanation
Answer: Microservices Microservices architecture is well-suited for supporting multiple currencies and languages in a globally expanding e-commerce platform. It allows for independent development, deployment, and scaling of services, promoting flexibility and scalability.
What is a primary requirement for a real-time chat application?
- A. Low latency communication
- B. High storage capacity
- C. Batch processing capabilities
- D. Strong encryption
Explanation
Answer: Low latency communication A primary requirement for a real-time chat application is low latency communication. This ensures that messages are delivered quickly, providing a seamless and responsive user experience.
Which architectural pattern is commonly used for building real-time chat applications?
- A. Client-Server
- B. Monolithic
- C. Microservices
- D. Peer-to-Peer
Explanation
Answer: Peer-to-Peer The peer-to-peer architectural pattern is commonly used for building real-time chat applications. It allows direct communication between users, reducing the need for a central server to handle all messages.
Which component is essential for ensuring real-time communication in a chat application?
- A. Message Queue
- B. Database
- C. WebSocket
- D. Cache
Explanation
Answer: WebSocket The WebSocket component is essential for ensuring real-time communication in a chat application. It provides a persistent, bidirectional communication channel between the server and clients, allowing instant message delivery.
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.
