22 Questions
Match the Java feature with its description:
Encapsulation = Eliminates error prone codes by emphasizing on compile time error checking and runtime checking Platform Independent = Java program is compiled into bytecode, which is platform independent and can be run on any machine Secure = Enables the development of virus free, temper free system and runs in Java runtime environment with almost null interaction with system OS Multi Threading = Makes it possible to write program that can do many tasks simultaneously by utilizing same memory and other resources to execute multiple threads at the same time
Match the Java characteristic with its description:
Architectural Neutral = Compiler generates bytecodes, which have nothing to do with a particular computer architecture, making Java program easy to interpret on any machine Portable = Java Byte code can be carried to any platform without implementation dependent features and predefined storage related elements like size of primitive data types High Performance = Enables high performance with the use of just-in-time compiler, although it will never be as fast as a compiled language like C or C++ Distributed = Programs can be designed to run on computer networks with a special class library for communicating using TCP/IP protocols, making network connections easy compared to C/C++
Match the following features of Java with their descriptions:
Simple = Java is easy to learn and has a clean syntax. Object Oriented = In Java, everything is an object with data and behavior. Security = Java addressed important security issues of the internet. Portability = Java can be easily run on different platforms.
Match the following OOP concepts with their descriptions:
Object = Basic unit of Object-Oriented Programming, representing real-world entities. Class = Blueprint for creating objects, defining their structure and behavior. Inheritance = Ability of a class to inherit properties and behavior from another class. Polymorphism = Ability to present the same interface for different data types.
Match the following terms with their association to Java and the internet:
Hot Java = First application program written in Java, used to run applets on the internet. Applets = Programs created in Java that can be run locally using a Java-enabled browser on the internet. Internet = Influenced by Java through simplifying web programming and inventing applets. Java-enabled browser = Allows internet users to run Java applets locally, extending the scope of the internet.
Match the following features of C++ with their relation to Java:
Pointers and Operator Overloading = Important concepts in C++ but not present in Java. Cleaner implementation = Confusing and ambiguous concepts of C++ were either left out or re-implemented in a cleaner way in Java. Extension = Java can be easily extended due to its Object Model. C++ influence = Java's syntax is cleaner and easier to understand compared to C++.
What is the first application program written in Java?
Hot Java
How has Java influenced the internet?
By simplifying web programming and inventing applets
What are two important issues of the internet that Java addressed?
Security and portability
What are some features of Java that make it easy to learn?
Simple syntax, clean and easy to understand
What is the basic concept of OOP's in Java?
Everything is an object with data and behavior
Name a feature of Java based on Object Model
Inheritance
What does Java emphasize to eliminate error prone codes?
Compile time error checking and runtime checking
What does Java guarantee as a language?
Write-once, run-anywhere
What feature of Java enables the development of virus free and temper free systems?
Secure features
What does Java's multithreading feature make possible?
Writing programs that can do many tasks simultaneously
What does Java's architectural neutral feature mean for a Java program?
Easy to interpret on any machine
What can be carried to any platform in Java?
Java Byte code
How does Java enable high performance despite being an interpreted language?
With the use of just-in-time compiler
What kind of language is Java in terms of distribution?
Distributed language
What is bytecode in Java?
A set of instructions for the Java Virtual Machine
Where is Java bytecode present?
In a .class file
Study Notes
Java Features and Characteristics
- Java is an object-oriented programming language (OOP) that emphasizes the basic concept of OOP, where objects interact with each other.
- Java is easy to learn due to its simplicity, familiarity, and verbose syntax.
- Java's architectural neutral feature means a Java program can run on any platform, without the need for recompilation.
Error Handling and Security
- Java emphasizes error handling to eliminate error-prone codes, ensuring robust and secure systems.
- Java guarantees memory management, preventing memory leaks and reducing the risk of bugs.
- Java's sandboxing feature enables the development of virus-free and tamper-free systems.
Performance and Distribution
- Despite being an interpreted language, Java enables high performance through just-in-time (JIT) compilation.
- Java is a distributed language, allowing for the creation of distributed applications and systems.
- Bytecode is the intermediate form of Java code, present in
.classfiles, which is interpreted by the Java Virtual Machine (JVM).
Multithreading and Platform Independence
- Java's multithreading feature makes possible the creation of programs that can perform multiple tasks concurrently, improving system responsiveness and throughput.
- Java's platform independence allows Java programs to be carried to any platform, without the need for recompilation or modification.
History and Influence
- The first application program written in Java was a web browser called "Oak".
- Java has significantly influenced the internet, enabling the creation of dynamic and interactive web applications, and addressing issues such as security and platform independence.
- Java addressed two important issues of the internet: security and platform independence.
Test your knowledge about the strong association between Java and the internet, including the creation and execution of applet programs, and the influence of Java on the internet. This quiz covers the impact of Java on web browsers, applet programs, and the extension of the local computer's storage system over the internet.
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