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Core java - Interview Questions and Answers for 'Knight capital' - 3 question(s) found - Order By Newest

Very frequently asked. Usually asked with questions related to String.
  Q1. What is an Immutable Object ?Core Java
Anonymous
Ans. Object that can't be changed after instantiation.

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Related Questions

  Why is String immutable in Java ?
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
  Why Char array is preferred over String for storing password?
 How is string object immutable if we can concat a string to it ?
  What is an immutable class ?
  How to implement 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 ?


 Q2. What are the benefits of creating immutable objects ?Core Java2017-01-22 16:01:54

Ans. 1. Security and Safety - They can be shared across multiple threads as they are thread safe. Moreover, it protects then from bad state due to interception by the other code segment. One such problem due to mutability and access by alternate code segment could be the change of hash code and then the impact on its search with hash collections.

2. Reuse - In some cases they can be reused as only one copy would exist and hence it can be relied upon. For example - String Pool

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   Like      Discuss      Correct / Improve     immutable objects     Knight Capital      Intermediate        frequent


Related Questions

  Why is String immutable in Java ?
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
  Why Char array is preferred over String for storing password?
 How is string object immutable if we can concat a string to it ?
  What is an Immutable Object ?
  What is an immutable class ?
  How to implement 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 ?


 Q3. Write a Program to find the missing integer in an array of consecutive numbers?Core Java2017-02-02 18:04:12

 This question was recently asked at 'Knight Capital'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve          Knight Capital


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