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What is the main advantage of using StringBuilder over regular String concatenation?

easy📝 Conceptual Q2 of 15
Java - Strings and String Handling
What is the main advantage of using StringBuilder over regular String concatenation?
AIt creates immutable strings.
BIt improves performance by reducing object creation.
CIt automatically synchronizes methods.
DIt converts strings to uppercase.
Step-by-Step Solution
Solution:
  1. Step 1: Understand string concatenation cost

    Regular String concatenation creates many temporary objects, slowing performance.
  2. Step 2: Role of StringBuilder

    StringBuilder modifies the same object, reducing object creation and improving speed.
  3. Final Answer:

    It improves performance by reducing object creation. -> Option B
  4. Quick Check:

    Performance boost = It improves performance by reducing object creation. [OK]
Quick Trick: Use StringBuilder to avoid many temporary strings [OK]
Common Mistakes:
  • Thinking StringBuilder creates immutable strings
  • Assuming it synchronizes methods
  • Confusing with string case conversion

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