Learn Java from Scratch - A Beginner's Guide - Step 07 - Java String Alternatives - StringBuffer and StringBuilder

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Information Technology (IT), Architecture
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University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is string concatenation considered inefficient in Java?
Because it requires creating multiple immutable string instances.
Because it uses too much memory.
Because it is not supported in Java.
Because it is a slow operation.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key feature of the StringBuffer class?
It is immutable.
It is mutable.
It is faster than StringBuilder.
It does not support concatenation.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does StringBuffer handle string modifications?
By converting strings to arrays.
By creating new instances for each modification.
By allowing direct changes to the existing instance.
By using a temporary buffer.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main difference between StringBuffer and StringBuilder?
StringBuffer is synchronized, while StringBuilder is not.
StringBuilder is synchronized, while StringBuffer is not.
StringBuffer is faster than StringBuilder.
StringBuilder does not support concatenation.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When should you prefer using StringBuilder over StringBuffer?
When you need thread safety.
When you are working in a single-threaded environment.
When you need to handle large strings.
When you want to avoid using memory.
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