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Core Java - Interview Questions and Answers for 'Immutability classes' - 3 question(s) found - Order By Newest

 Q1. Is immutability an advantage with Wrapper classes over primitive types ? Core Java2017-08-24 21:43:19

Ans. There is no concept of de referencing with primitive types and hence they are implicitly immutable. Having wrapper classes as mutable offers disadvantages compared to primitive types. Wrapper classes being immutable offer similar advantage as primitive types.It actually overshadows the disadvantage wrapper class could have if they are immutable.

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 Q2. Which immutable classes have you worked with ? Can you name some immutable Collections ? How to make an immutable collection ?Core Java2017-08-28 17:11:22

Ans. string and wrapper class objects

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   Like         Discuss         Correct / Improve     immutability  immutable  immutability classes   immutable  immutability collections     Asked in 3 Companies


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 Q3. What are the benefits of immutability or Immutable classes ?Core Java2017-08-28 19:36:18

Ans. Immutable objects are thread-safe so you will not have any synchronization issues.Immutable objects are good for Map keys and Set elements, since these typically do not change once created.Immutability makes it easier to write, use and reason about the code (class invariant is established once and then unchanged)Immutability makes it easier to parallelize your program as there are no conflicts among objects.The internal state of your program will be consistent even if you have exceptions.References to immutable objects can be cached as they are not going to change.

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   Like         Discuss         Correct / Improve     immutable  immutability classes   benefits of immutable  immutability classes     Asked in 1 Companies


Related Questions

  Why is String immutable in Java ?
  Why Char array is preferred over String for storing password?
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
 How is string object immutable if we can concat a string to it ?
  How to implement an immutable class ?
  What is an Immutable Object ?
  What is an immutable class ?
  Does Declaring an object "final" makes it immutable ?
  What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ?
  What are advantages of stateless and / or immutable objects ?



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