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How to prepare for Java Interview Java Interview Questions

424 views · Published 26 October 2013 · 4:53 · Indexed 1 November 2026

Channel: Interview DOT · 2013 · Science & Technology

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How to prepare for Core Java Interview Questions Tips ? 

Be thorough about OOA&D definitions, such as polymorphism, inheritance, abstraction,etc.
Know the difference between an interface and an abstract class. When to use it ?
Be clear about  Java does not support multiple inheritance the way C++ does.  
Know that you implement an interface (can implement more than one).  
Know about the access modifiers: public/friendly(default)/protected/private.
Know the two ways to start a thread - "extending Thread" or "implementing Runnable".  
Know that the method is "run" but to run a thread you use "start". 
Understand "Serialization" & "Deserialization" process in java,How it works ?
How HashMap Works ? importance of "equals()" & "hashCode()"  methods ?
Exceptions -- Error ,Checked , Unchecked Exceptions,Finally block ?
Thread concepts -- synchronization at object level & class level.
Java collections basics ,generics basics.
Be clear about "Java Pass By Value".
How Strings are stored in Heap ? Immutable objects in Java ?Different types of Memory in Java ie Heap,Stack,Method Area,etc ?
How Garbage Collection works in Java ? What is the advantage ?

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