HashMap & HashSet are not only one of the frequently used data structures, but also one of the popular interview topics.
Q1. How does a HashMap store data?
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Home › Java-Success.com › Java-Success.com - Q&As › 300+ Core Java Q&As › Archive for Core Java – Objects
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5 Java Object class methods interview questions & answers
Q1. What are the non-final methods in Java Object class, which are meant primarily for extension? A1. The non-final methods are equals( ), … Read more ›...
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Login Register Try Java FAQs Try Big Data FAQs Home8 Java immutable objects interview questions & answers
Best Practice: “Classes should be immutable unless there’s a very good reason to make them mutable….If a class cannot be made immutable, limit its mutability as much as possible.” …...
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Login Register Try Java FAQs Try Big Data FAQs HomeJava enum interview questions & answers
Covers the power of enumand 3 design patterns that can be applied with the help of enums. Q1. Why is it a best practice to use enums over static final...
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Login Register Try Java FAQs Try Big Data FAQs HomeJava serialization, cloning, and casting interview Q&A
Q1. Which Java interface must be implemented by a class whose instances are transported via a Web service? a. Accessible b. BeanInfo c. Remote d. … Read more ›...
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Login Register Try Java FAQs Try Big Data FAQs HomeMocks, stubs, domain, and anemic objects interview Q&A
Q1. What are mock objects? A1. Mock objects are used in unit testing to ensure that your tests don’t fail due to volatility of the data changes. … Read more...
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Login Register Try Java FAQs Try Big Data FAQs HomeObject equals Vs == and pass by reference Vs value
Q1. What is the difference between “==” and equals(..) method when comparing 2 objects?
A1.It is important to understand the difference between identity (i.e.
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