[Solved] What will be printed by this code?String s = "Hello"; StringBuilder sb = new StringBuilder(s); sb.append(" World"); System.out.println(s); System.out.println(sb); | Java

Java - Strings and String Handling

What will be printed by this code?

String s = "Hello";
StringBuilder sb = new StringBuilder(s);
sb.append(" World");
System.out.println(s);
System.out.println(sb);

AHello World\nHello World

BHello\nHello World

CHello\nHello

DHello World\nHello

Step-by-Step Solution

Solution:

Step 1: Understand String immutability
Variable s remains "Hello" because String is immutable and not changed.
Step 2: StringBuilder appends " World"
sb becomes "Hello World" after append.
Final Answer:
Hello Hello World -> Option B
Quick Check:
String unchanged; StringBuilder changed [OK]

Quick Trick: String unchanged; StringBuilder changes with append [OK]

Common Mistakes:

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