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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does it mean for a string to be immutable?
💡 Hint: Think about whether altering a string would affect the original.
Question 2
Easy
If you call toUpperCase() on a string 'hello', what happens?
💡 Hint: Consider what happens behind the scenes.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What happens when you try to change a string in Java?
- The string is modified
- A new string is created
- Nothing happens
💡 Hint: Consider how Java handles string operations.
Question 2
Is it true that string immutability prevents accidental changes to string values?
- True
- False
💡 Hint: Think about why immutability exists.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a Java program that demonstrates string immutability by trying to modify a string and showing the original and new strings side by side.
💡 Hint: Pay attention to how the original string behaves after the operation.
Question 2
Find and explain a scenario where string immutability could cause performance bottlenecks.
💡 Hint: Consider operations involving large loops and repeated string modifications.
Challenge and get performance evaluation