Core Java Programming Course- StringBuilder Class
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you concatenate strings in Java?
The original string is modified.
A new string object is created.
The string becomes mutable.
The string is stored in a temporary buffer.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is creating multiple string objects during concatenation inefficient?
It causes syntax errors.
It increases the complexity of the code.
It leads to higher memory usage.
It makes the strings mutable.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the StringBuilder class improve performance?
By allowing direct modification of string objects.
By using a different syntax for concatenation.
By reducing the number of string objects created.
By making strings immutable.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method is used in StringBuilder for concatenation?
concat()
join()
merge()
append()
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following methods is unique to the StringBuilder class?
charAt()
substring()
indexOf()
delete()
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