What are processes vs threads?
Company: xAI
Role: Machine Learning Engineer
Category: Software Engineering Fundamentals
Difficulty: medium
Interview Round: Take-home Project
## Question
Explain the difference between **multiprocessing** and **multithreading** in the context of building concurrent applications.
Cover the following:
- What a **process** is vs what a **thread** is
- How **memory/address space** is managed in each
- **Communication** patterns (shared memory vs IPC)
- Typical **performance trade-offs** (CPU-bound vs I/O-bound)
- Common **failure/isolation** implications (crash containment)
- Give 1–2 concrete examples of when you would choose each approach
Quick Answer: This question evaluates understanding of concurrency concepts—processes versus threads—including memory/address-space management, shared-memory versus inter-process communication, performance trade-offs for CPU-bound versus I/O-bound workloads, and failure/isolation implications such as crash containment.