Advanced OOP Concepts in Java
Java Execution & Architecture
Data Types & Control Logic
System-Level Computing Concepts
Access Control & Program Structure
100
This principle hides internal implementation details while showing only essential behavior, improving security and simplicity, like driving a car without seeing the engine mechanics.
What is Abstraction?
100
This platform-independent intermediate code is generated after Java compilation and allows execution on any system with a JVM.
What is Bytecode?
100
This data type stores sequences of characters and is commonly used for text such as user input, messages, and labels in applications.
What is String?
100
This lowest-level language consists of binary digits (0s and 1s) and is directly executed by the CPU without translation.
What is Machine Code?
100
This access modifier restricts visibility so that a variable or method can only be accessed within the same class
What is Private?
200
This concept protects data by restricting direct access and enforcing controlled interaction through methods such as getters and setters, improving data security and integrity.
What is Encapsulation?
200
This virtual machine acts as a runtime environment that interprets and executes Java bytecode across different operating systems.
What is the Java Virtual Machine (JVM)?
200
This primitive data type represents logical conditions and is used in decision-making structures like if-statements
What is Boolean?
200
This symbolic low-level language uses human-readable instructions that are translated into machine code by an assembler
What is Assembly Language?
200
This access modifier allows unrestricted access to a class, method, or variable from any other class in the program
What is Public?
300
This mechanism allows a class to inherit properties and behavior from another class, enabling code reuse and hierarchical relationships (e.g., Animal → Dog)
What is Inheritance?
300
This tool compiles Java source code into bytecode and checks for syntax and type errors before execution
.
What is the Java Compiler?
300
This data type is used for decimal numbers requiring precision in calculations such as financial or scientific applications.
What is Double?
300
This volatile memory temporarily stores data and instructions for active programs to ensure fast processing during execution
What is RAM?
300
These reserved words in Java have predefined meanings and cannot be used as identifiers, such as class, void, or static
What are Keywords?
400
This concept allows a single method or interface to behave differently depending on the object, improving flexibility and scalability in software design.
What is Polymorphism?
400
This JVM component executes bytecode using interpretation and Just-In-Time (JIT) compilation for performance optimization.
What is the Execution Engine?
400
This reusable block of code encapsulates logic to perform a specific task, improving modularity and reducing redundancy in programs
What is a Method?
400
These are low-level requests made by software to interact with the operating system for resources such as file access or hardware control
What are OS Calls?
400
This file represents a compiled Java class containing bytecode that is executed by the JVM
What is a Class File?
500
This programming paradigm models real-world systems using objects that combine data and behavior,making large applications easier to design, maintain, and scale.
What is Object-Oriented Programming (OOP)?
500
This core design principle enables Java’s portability by allowing programs to run unchanged across different operating systems.
What is “Write Once, Run Anywhere” (JVM concept)?
500
This control structure repeatedly executes a block of code until a condition becomes false, commonly used for iterating through data collections
What is a Loop?
500
These compiled output files contain Java bytecode and are executed by the JVM during runtime
What are Class Files?
500
This blueprint defines the structure and behavior of objects, including fields (data) and methods (functions)
What is a Class?