Java Interview Preparation
Ace your next Java interview with our curated collection of frequently asked questions. From Core Java to Advanced concepts, we've got you covered.
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Core Java
Fundamental concepts including JVM, variables, data types, and operators.
JVMVariablesData Types+2
OOP Concepts
Object-Oriented Programming pillars: Encapsulation, Inheritance, Polymorphism, Abstraction.
Class & ObjectInheritancePolymorphism+2
Collections
List, Set, Map, Queue implementations and internal workings.
ArrayListHashMapHashSet+2
Multithreading
Thread lifecycle, synchronization, concurrent utilities, and executors.
Thread LifecycleSynchronizationExecutors+2
Java 8+ Features
Lambdas, Streams, Optional, and modern Java updates.
LambdaStreamsOptional+1
Exception Handling
Try-catch blocks, custom exceptions, and best practices.
Checked vs UncheckedTry-CatchCustom Exceptions+1
Most Asked Questions
Core Java
What is the difference between JDK, JRE, and JVM?
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OOP ConceptsExplain the four pillars of OOPs.
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CollectionsDifference between ArrayList and LinkedList?
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Core JavaWhat is the contract between equals() and hashCode()?
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MultithreadingExplain Thread Lifecycle in Java.
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Core JavaWhy is String immutable in Java?
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