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What is the main purpose of using Ractor in Ruby?

easy📝 Conceptual Q11 of 15
Ruby - Concurrent Programming
What is the main purpose of using Ractor in Ruby?
ATo run code truly in parallel on multiple CPU cores
BTo create graphical user interfaces
CTo handle database connections
DTo write single-threaded scripts
Step-by-Step Solution
Solution:

  1. Step 1: Understand Ractor's role

    Ractor is designed to enable true parallel execution in Ruby, using multiple CPU cores.

  2. Step 2: Compare options

    Options A, B, and C do not relate to parallelism or CPU core usage.

  3. Final Answer:

    To run code truly in parallel on multiple CPU cores -> Option A

  4. Quick Check:

    Ractor = true parallelism [OK]
Quick Trick: Ractor means real parallel tasks in Ruby [OK]
Common Mistakes:
  • Confusing Ractor with threads
  • Thinking Ractor is for UI or database
  • Assuming Ractor runs code sequentially

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