EmSAT Achieve Exam > EmSAT Achieve Questions > Which of the following statements is true abo...
Start Learning for Free
Which of the following statements is true about mutable and immutable strings in Java?
- a)Strings are always mutable in Java.
- b)Immutable strings cannot be changed once created.
- c)Mutable strings cannot be used in Java.
- d)Immutable strings are more memory-efficient than mutable strings.
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Which of the following statements is true about mutable and immutable ...
Immutable strings are created using the 'String' class in Java, and their values cannot be modified after creation.
Free Test
FREE
| Start Free Test |
Community Answer
Which of the following statements is true about mutable and immutable ...
Immutable Strings in Java
Immutable strings in Java are strings that cannot be changed once they are created. This means that any operation that appears to modify an immutable string actually creates a new string with the desired modifications. The original string remains unchanged.
Advantages of Immutable Strings
There are several advantages to using immutable strings in Java:
1. Thread Safety: Immutable strings are inherently thread-safe because they cannot be modified. Multiple threads can access and use the same immutable string without worrying about concurrent modifications.
2. Security: Immutable strings are often used to store sensitive information such as passwords or encryption keys. Since they cannot be changed, there is no risk of accidentally modifying or exposing the sensitive data.
3. String Pool: Java maintains a pool of immutable strings, known as the string pool. When a new string is created, Java checks if an identical string already exists in the pool. If it does, the new string references the existing one, reducing memory usage. This string interning helps improve performance and memory efficiency.
4. Caching: Immutable strings can be safely cached, as their values cannot change. This caching can lead to performance improvements, especially when dealing with frequently used strings.
5. Hashing: Immutable strings are suitable for use as keys in hash-based data structures like HashMaps. Since the hash code of a string is based on its content, and immutable strings cannot be modified, the hash code remains consistent.
Conclusion
Immutable strings in Java provide several advantages, including thread safety, security, efficient memory usage through string interning, caching capabilities, and suitability for use as keys in hash-based data structures. Understanding the concept of immutability is crucial for efficient and reliable Java programming.
Immutable strings in Java are strings that cannot be changed once they are created. This means that any operation that appears to modify an immutable string actually creates a new string with the desired modifications. The original string remains unchanged.
Advantages of Immutable Strings
There are several advantages to using immutable strings in Java:
1. Thread Safety: Immutable strings are inherently thread-safe because they cannot be modified. Multiple threads can access and use the same immutable string without worrying about concurrent modifications.
2. Security: Immutable strings are often used to store sensitive information such as passwords or encryption keys. Since they cannot be changed, there is no risk of accidentally modifying or exposing the sensitive data.
3. String Pool: Java maintains a pool of immutable strings, known as the string pool. When a new string is created, Java checks if an identical string already exists in the pool. If it does, the new string references the existing one, reducing memory usage. This string interning helps improve performance and memory efficiency.
4. Caching: Immutable strings can be safely cached, as their values cannot change. This caching can lead to performance improvements, especially when dealing with frequently used strings.
5. Hashing: Immutable strings are suitable for use as keys in hash-based data structures like HashMaps. Since the hash code of a string is based on its content, and immutable strings cannot be modified, the hash code remains consistent.
Conclusion
Immutable strings in Java provide several advantages, including thread safety, security, efficient memory usage through string interning, caching capabilities, and suitability for use as keys in hash-based data structures. Understanding the concept of immutability is crucial for efficient and reliable Java programming.
Attention EmSAT Achieve Students!
To make sure you are not studying endlessly, EduRev has designed EmSAT Achieve study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in EmSAT Achieve.
|
Explore Courses for EmSAT Achieve exam
|
|
Similar EmSAT Achieve Doubts
Top Courses for EmSAT AchieveView all
Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer?
Question Description
Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? for EmSAT Achieve 2024 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer?.
Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? for EmSAT Achieve 2024 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for EmSAT Achieve.
Download more important topics, notes, lectures and mock test series for EmSAT Achieve Exam by signing up for free.
Here you can find the meaning of Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements is true about mutable and immutable strings in Java?a)Strings are always mutable in Java.b)Immutable strings cannot be changed once created.c)Mutable strings cannot be used in Java.d)Immutable strings are more memory-efficient than mutable strings.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice EmSAT Achieve tests.
|
|
Explore Courses for EmSAT Achieve exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup