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What is the primary reason to use immutability in system design for safety?

easy📝 Conceptual Q1 of 15
LLD - Advanced LLD Concepts
What is the primary reason to use immutability in system design for safety?
ATo improve the speed of data mutation
BTo reduce memory usage by sharing mutable objects
CTo allow multiple threads to write data simultaneously
DTo prevent accidental changes to data after creation
Step-by-Step Solution
Solution:

  1. Step 1: Understand immutability concept

    Immutability means data cannot be changed after creation, preventing accidental modification.

  2. Step 2: Identify safety benefit

    This prevents bugs caused by unexpected data changes, especially in concurrent environments.

  3. Final Answer:

    To prevent accidental changes to data after creation -> Option D

  4. Quick Check:

    Immutability = Prevent accidental changes [OK]
Quick Trick: Immutable means unchangeable after creation [OK]
Common Mistakes:
  • Confusing immutability with performance optimization
  • Thinking immutability allows simultaneous writes
  • Assuming immutability reduces memory usage

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