Java Core in Practice: 120+ Exercises and Quizzes for 2025
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What you’ll learn
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Java Core
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Java Development Kit (JDK) setup
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Basic Java program execution
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Integrated Development Environment (IDE) understanding
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Primitive data types usage
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Variable declaration and initialization
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Type casting
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Primitive and non-primitive data type differentiation
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Array and string declaration
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Variable naming conventions
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Variable scope
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Console output
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Console input using the Scanner class
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Arithmetic operators usage
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Comparison and logical operators usage
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Operator precedence understanding
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if-else statement usage
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Switch statement usage
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Loop usage (for, while, do-while)
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Loop control (break, continue)
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Method definition and invocation
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Method overloading
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Recursion in methods
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Array manipulation
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String immutability understanding
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String concatenation
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String comparison
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String formatting
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String pool concept
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Object Oriented Programming (Java OOP)
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Class and object creation
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Constructor usage
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Encapsulation with getters and setters
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Inheritance implementation
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Method overriding
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Use of the super keyword
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Polymorphism in Java
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Method overloading and overriding differentiation
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Abstract classes and interfaces usage
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SOLID principles application
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Exception handling with try-catch blocks
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Checked and unchecked exceptions differentiation
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Custom exception creation
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Collections and Maps
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List, Set, and Queue usage
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Map manipulation
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Iterator usage
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Enumerations
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Generic class and method creation
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Input/output stream usage
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Object serialization and deserialization
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Thread management
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Synchronization for thread safety
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Executor framework usage
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Fork/Join framework usage
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Thread pooling
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Atomic variables for thread safety
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Inter-thread communication with wait-notify
