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Core java - Interview Questions and Answers for 'Adnovum' - 1 question(s) found
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Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant
Q1.
What is an Immutable Object ?
Core Java
Ans. Object that can't be changed after instantiation.
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 java   oops   immutable  immutability
Asked in 27 Companies
basic
 
frequent
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Try 2 Question(s) Test
Which of the following class creates mutable objects ?
Boolean
File
String
StringBuffer
Which of the following class creates immutable objects ?
String
StringBuffer
StringBuilder
None of these create immutable objects.
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What is an immutable class ?
Does Declaring an object "final" makes it immutable ?
Is String final in Java ?
What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ?
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