Java and Object-Oriented Programming

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Questions and Answers

Which concept involves bundling data and methods that operate on that data within a class, protecting it from outside access?

  • Encapsulation (correct)
  • Polymorphism
  • Inheritance
  • Abstraction

What is the primary function of the Java Virtual Machine (JVM)?

  • To execute Java bytecode by interpreting or JIT compiling it. (correct)
  • To compile Java source code into machine code.
  • To provide a platform for web browsing.
  • To manage operating system resources.

In Java, what mechanism allows a class to inherit properties and methods from another class?

  • Polymorphism
  • Encapsulation
  • Inheritance (correct)
  • Abstraction

What term describes the ability of an object to take on many forms?

<p>Polymorphism (D)</p> Signup and view all the answers

Which of the following is NOT a type of operator in Java?

<p>Differential (D)</p> Signup and view all the answers

What is the process of converting one data type to another known as in Java?

<p>Type casting (D)</p> Signup and view all the answers

Which of the following facilitates hiding the implementation details and showing only the essential information about an object?

<p>Abstraction (A)</p> Signup and view all the answers

What is the compiled form of a Java program that the JVM can execute?

<p>Bytecode (D)</p> Signup and view all the answers

Within the context of object-oriented programming, what encompasses objects and classes?

<p>Object-oriented programming (OOP) (C)</p> Signup and view all the answers

Which feature of Java enables passing information to the program during runtime?

<p>Command line arguments (A)</p> Signup and view all the answers

Flashcards

Object-Oriented Programming (OOP)

A programming paradigm based on the concept of "objects", which contain data and methods. Includes key principles like encapsulation, inheritance, and polymorphism.

Class

A blueprint for creating objects. It defines the attributes (data) and methods (behavior) that the objects of that class will have.

Encapsulation

Wrapping data (attributes) and methods (behavior) that operate on the data within a single unit (class), and protecting it from outside access.

Inheritance

A mechanism where a new class (subclass or derived class) inherits properties and behaviors from an existing class (superclass or base class).

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Polymorphism

The ability of an object to take on many forms. It allows objects of different classes to respond to the same method call in their own way.

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Dynamic Binding

The process of associating a method call to its specific implementation at runtime.

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Java Virtual Machine (JVM)

The environment that enables a computer to run a Java program, involving code interpretation and execution.

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Bytecode

A sequence of instructions in a binary format to be executed by the Java Virtual Machine.

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Type Casting

Converting a variable from one data type to another (e.g., from int to double).

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Operators in Java

Symbols that perform operations on one or more operands (variables or values). Examples include arithmetic (+, -, *), relational (==, !=), and logical (&&, ||) operators.

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Study Notes

Object-Oriented Programming Concepts

  • Core concepts include objects and classes
  • Additional principles consist of data abstraction and encapsulation
  • Inheritance and polymorphism are fundamental aspects
  • Dynamic binding and message passing are also included

Java Fundamentals

  • Key features define the language
  • The Java Virtual Machine (JVM) is important
  • Byte code interpretation is a crucial process

Program Structure and Data

  • Writing simple Java programs as an initial step
  • Command-line arguments is a method for input
  • Data types and type casting are essential for data handling
  • Operators, including arithmetic, increment, decrement, relational, logical, bitwise, and conditional, are used in expressions

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