Solution:Step 1: Insert "123" at index 1 in "abc"Result after insert: "a123bc".Step 2: Delete characters from index 2 to 3 (4 excluded)Characters at index 2 and 3 are '2' and '3', so after deletion: "a1bc".Final Answer:a1bc -> Option AQuick Check:Insert then delete correct substring [OK]

[Solved] Given this code:StringBuilder sb = new StringBuilder("abc"); sb.insert(1, "123"); sb.delete(2, 4); System.out.println(sb);What is the output? | Java

Java - Strings and String Handling

Given this code:

StringBuilder sb = new StringBuilder("abc");
sb.insert(1, "123");
sb.delete(2, 4);
System.out.println(sb);

What is the output?

Aa1bc

Ba13bc

Ca123bc

Da23bc

Step-by-Step Solution

Solution:

Step 1: Insert "123" at index 1 in "abc"
Result after insert: "a123bc".
Step 2: Delete characters from index 2 to 3 (4 excluded)
Characters at index 2 and 3 are '2' and '3', so after deletion: "a1bc".
Final Answer:
a1bc -> Option A
Quick Check:
Insert then delete correct substring [OK]

Quick Trick: Insert adds text; delete removes specified range [OK]

Common Mistakes:

Miscounting indexes for delete
Confusing insert position

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More Java Quizzes

Given this code:

Step 1: Insert "123" at index 1 in "abc"

Step 2: Delete characters from index 2 to 3 (4 excluded)

Final Answer:

Quick Check:

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