Most asked top Interview Questions and Answers & Online Test
Education platform for interview prep, online tests, tutorials, and live practice

Build skills with focused learning paths, mock tests, and interview-ready content.

WithoutBook brings subject-wise interview questions, online practice tests, tutorials, and comparison guides into one responsive learning workspace.

Prepare Interview

Mock Exams

Make Homepage

Bookmark this page

Subscribe Email Address
Home / Interview Subjects / System Design
WithoutBook LIVE Mock Interviews System Design Related interview subjects: 74

Interview Questions and Answers

Know the top System Design interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Total 30 questions Interview Questions and Answers

The Best LIVE Mock Interview - You should go through before interview

Know the top System Design interview questions and answers for freshers and experienced candidates to prepare for job interviews.

Interview Questions and Answers

Search a question to view the answer.

Experienced / Expert level questions & answers

Ques 1

Create a distributed cache system.

The system can use a consistent hashing algorithm to distribute keys across multiple cache nodes, and a mechanism to handle cache misses by fetching data from the main storage.

Example:

When a node receives a cache miss, it fetches the data from the main database and stores it in the cache for future requests.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 2

Build a content delivery network (CDN).

The system includes edge servers strategically placed worldwide to cache and deliver static content, reducing latency and improving performance.

Example:

A user in Asia requests an image, and it's served from the nearest edge server instead of the origin server.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 3

Design a scalable news feed system like Facebook's.

The system comprises a feed generation service, a storage system for user posts, and algorithms to rank and personalize the feed based on user interests.

Example:

User sees posts in their feed based on relevance and recency.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 4

Build a fault-tolerant file storage system.

The system can replicate data across multiple servers, use erasure coding for data durability, and implement techniques like sharding for better performance.

Example:

Even if one server fails, the system ensures data availability and integrity.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 5

Create a scalable video streaming service like Netflix.

The system includes a content delivery network, video encoding/transcoding servers, and a recommendation engine to provide a seamless streaming experience.

Example:

A user selects a movie, and the system streams it in high quality without buffering.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 6

Design a distributed file system.

The system involves a master server for metadata, chunk servers for storing data, and a replication mechanism for fault tolerance.

Example:

A user uploads a large file, and it gets distributed and replicated across multiple servers for reliability.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 7

Design a real-time stock trading system.

The system includes a trading engine, order matching algorithm, and a distributed database for storing real-time stock prices and transaction history.

Example:

A user places a stock order, and the system executes it in real-time based on market conditions.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 8

Design a video conferencing system.

The system involves audio/video processing, real-time communication, and scalability to support multiple participants in a conference.

Example:

Multiple users join a video call, and the system ensures smooth communication with low latency.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 9

Design a content moderation system for a user-generated platform.

The system uses machine learning models, user reports, and manual review to identify and filter inappropriate content.

Example:

A user posts content, and the system automatically detects and removes content violating community guidelines.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 10

Design an e-commerce search engine.

The system involves indexing products, ranking algorithms, and handling user queries with efficient search and filtering capabilities.

Example:

A user searches for 'laptops,' and the system returns relevant products with sorting options.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 11

Design a scalable IoT (Internet of Things) platform.

The system involves device connectivity, data processing, and storage for managing a large number of IoT devices and their data.

Example:

Sensors in smart home devices send data to the platform, and the system processes and stores the information for analysis.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 12

Design a scalable message queue system.

The system involves message producers, queues, and consumers, with features like message persistence, load balancing, and fault tolerance.

Example:

Services in a microservices architecture communicate by sending messages through the queue.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 13

Create a collaborative document editing system like Google Docs.

The system involves real-time collaboration, version control, and conflict resolution mechanisms to enable multiple users to edit a document simultaneously.

Example:

Several users edit a document together, and changes are reflected in real-time across all collaborating users.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 14

Design an online multiplayer gaming system.

The system involves game servers, matchmaking algorithms, and real-time communication for a seamless multiplayer gaming experience.

Example:

Players from different locations connect to the game server and engage in a multiplayer game with low latency.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 15

Design an event-driven architecture for a financial trading system.

The system uses events to trigger actions, ensuring real-time updates and responses to market changes in the financial trading domain.

Example:

A change in stock prices triggers automatic buy/sell orders in response to predefined trading algorithms.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 16

Create a system for real-time analytics on a streaming data source.

The system involves data ingestion, processing, and analytics in real-time to provide insights on streaming data.

Example:

Sensor data from IoT devices is continuously analyzed to detect anomalies and trigger alerts in real-time.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments
Ques 17

Design a distributed task scheduling system.

The system manages the distribution and execution of tasks across multiple nodes, considering load balancing and fault tolerance.

Example:

A cluster of servers schedules and executes tasks in parallel to efficiently process a large workload.
Save For Revision

Save For Revision

Bookmark this item, mark it difficult, or place it in a revision set.

Open My Learning Library
Is it helpful?
Add Comment View Comments

Most helpful rated by users:

Copyright © 2026, WithoutBook.