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Questions and Answers
What is the purpose of abstraction in managing complex systems?
What is the purpose of abstraction in managing complex systems?
To hide the details of the system and only show the essential components, making it easier to use.
What is encapsulation in programming?
What is encapsulation in programming?
Binding and wrapping up the methods and the data together to keep them safe from being misused or mishandled.
Explain the concept of inheritance in programming with an example.
Explain the concept of inheritance in programming with an example.
Inheritance is the process by which an object acquires the properties of another object. For example, an Alsatian inherits the characteristics of a dog, which itself inherits the characteristics of a mammal.
What is polymorphism in programming?
What is polymorphism in programming?
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Why is Java called an Internet language?
Why is Java called an Internet language?
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What is the advantage of bytecode in Java programming?
What is the advantage of bytecode in Java programming?
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What is the role of the JVM in Java programming?
What is the role of the JVM in Java programming?
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Why is Java considered a portable language?
Why is Java considered a portable language?
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What is the role of Java Virtual Machine (JVM) in executing a Java program?
What is the role of Java Virtual Machine (JVM) in executing a Java program?
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What is the intermediate level language that Java compiler translates the source code to?
What is the intermediate level language that Java compiler translates the source code to?
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What is the feature of Java that allows it to build distributed applications?
What is the feature of Java that allows it to build distributed applications?
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How does Java perform type checking?
How does Java perform type checking?
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What is abstraction in object-oriented programming?
What is abstraction in object-oriented programming?
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What is the characteristic of Java programs that makes them portable?
What is the characteristic of Java programs that makes them portable?
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Why is Java considered a popular programming language?
Why is Java considered a popular programming language?
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What is the execution stage of Java bytecode?
What is the execution stage of Java bytecode?
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What is the main concept of object-oriented programming?
What is the main concept of object-oriented programming?
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What are the two types of programming languages mentioned in the text?
What are the two types of programming languages mentioned in the text?
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What is the purpose of encapsulation in OOP?
What is the purpose of encapsulation in OOP?
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What is the benefit of using inheritance in OOP?
What is the benefit of using inheritance in OOP?
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What is bytecode in Java?
What is bytecode in Java?
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What is the difference between POP and OOP?
What is the difference between POP and OOP?
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What is the purpose of JVM in Java?
What is the purpose of JVM in Java?
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What is the characteristic of polymorphism in Java?
What is the characteristic of polymorphism in Java?
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Study Notes
Object-Oriented Programming (OOP)
- OOP simulates the real world in software, where real-world objects are represented as software objects.
- The main principles of OOP are:
- Encapsulation: Binding and wrapping up methods and data together to keep them safe from misuse.
- Abstraction: Hiding unnecessary details and representing only essential features.
- Inheritance: Acquiring properties from another object (e.g., Alsatian inherits characteristics from dog, dog from mammal, and mammal from animal).
- Polymorphism: Same operation functions differently on different classes (e.g., "move" behaves differently on Microsoft Windows and a chess game).
Java and JVM
- Java is called an Internet language because Java programs are translated to bytecode, which is not affected by the machine environment, making them portable.
- JVM (Java Virtual Machine) is an interpreter that translates bytecode to machine language and runs it.
- JVM, along with Java Application Interface libraries, acts as a platform for Java programs to run on a machine.
Characteristics of Object-Oriented Programming
- Abstraction: Hiding unnecessary details and representing only essential features.
- Encapsulation: Protects objects from misuse by binding and wrapping up methods and data together.
- Inheritance: Acquiring properties from another object.
- Polymorphism: Same operation functions differently on different classes.
Java Features
- Purely object-oriented programming language
- Can be used to build distributed applications
- Compiled and interpreted
- Portable (can be carried to different machines in the form of bytecode)
- Handles unexpected faults and errors
- Performs type checking on the user machine
- Allows for multitasking
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