Fundamentals of Android Applications Unit 1

Questions and Answers

What is the main advantage of Java's platform independence?

Java code is run directly on the hardware

Java code is compiled into bytecode (correct)

Java applications are only usable on Windows

Java cannot run on mobile devices

Java supports Object-Oriented Programming.

True

What does API stand for?

Application Programming Interface

Java does not include automatic garbage collection.

False Signup and view all the answers

Which of the following IDEs is not open-source?

IntelliJ IDEA Signup and view all the answers

What are the four fundamental principles of OOP?

Encapsulation, Inheritance, Polymorphism, Abstraction Signup and view all the answers

The definition of a class in Java is a ______ for creating objects.

blueprint Signup and view all the answers

What does a function do in programming?

Executes code to perform a task Signup and view all the answers

Memory is allocated when a class is defined in Java.

False Signup and view all the answers

Study Notes

Java Fundamentals

Java is a widely-used programming language due to its platform independence, allowing code to run on any device with a Java Virtual Machine (JVM).
Object-oriented programming (OOP) in Java promotes modularity and reusability, making code more manageable.
A rich standard library provides extensive APIs for various tasks, minimizing the need for code repetition.
Java supports automatic garbage collection, managing memory resources and minimizing memory leaks.
It features strong exception handling and built-in security measures like bytecode verification and sandboxing for developing robust applications.
Java's multi-threading capabilities enable concurrent task execution, enhancing application performance.
The language benefits from a large developer community, ensuring plenty of resources and support.
Popular Integrated Development Environments (IDEs) for Java include Eclipse, IntelliJ IDEA, and NetBeans, which streamline development with tools for debugging and project management.

Object-Oriented Programming (OOP)

OOP is centered around "objects," which are instances of classes, facilitating organized and reusable software structure.
The four principles of OOP are:
- Encapsulation: Bundling data and methods that operate on the data.
- Inheritance: Creating new classes based on existing ones to promote code reuse.
- Polymorphism: Allowing entities to use methods in various forms.
- Abstraction: Hiding complex reality while exposing essential parts.

Class in Java

A class is a blueprint for creating objects, defining properties (fields) and methods (functions) relevant to those objects.
Components of a class include:
- Fields (Variables): Attributes that represent the state of the class.
- Methods: Functions that define the behavior of the objects.
- Constructors: Special methods that initialize objects upon creation.

Objects

An object is an instance of a class; memory allocation occurs when an object is created.
Objects represent real-world entities, encapsulating specific data and behaviors relevant to those entities.

Description

Explore the fundamental concepts of Android applications in this quiz, which covers Object-Oriented Programming (OOPS), software engineering principles, and the basics of Android development. Gain insight into why Java is the preferred language for developing Android applications, emphasizing its platform independence.