Java Programming Knowledge Quiz

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Questions and Answers

Which of the following contributes to the portability and security of Java?

Dynamic Architecture Neutral
Dynamic binding between objects
Byte code is executed by JVM (correct)
Use of pointers

What makes Java code secure and portable?

Use of exception handling
Dynamic Architecture Neutral
Object-oriented
The applet (correct)

Which of the following is not a Java feature?

Object-oriented
Use of exception handling
Use of pointers (correct)
Dynamic Architecture Neutral

What is the execution order of elements in a class with a method, static block, instance block, and constructor?

<p>Instance block, method, static block, and constructor (A)</p> Signup and view all the answers

What contributes to the dynamic nature of Java?

<p>Dynamic binding between objects (D)</p> Signup and view all the answers

Flashcards

What makes Java portable?

Java bytecode is executed by the JVM (Java Virtual Machine). This allows Java programs to run on any platform with a compatible JVM, making Java portable.

How does Java ensure security?

Java's bytecode is designed to be secure. It prevents direct access to memory, reduces security risks, and allows for secure execution in a sandbox environment.

Why doesn't Java use pointers?

Java doesn't use pointers explicitly. It uses references to objects, providing a safer approach to memory management and reducing the risk of memory errors.

What's the execution order of elements in a Java class?

In a Java class, the execution order is as follows:

Static block (executed once when the class is loaded)
Instance block (executed each time an object is created)
Constructor (responsible for initializing the object)
Method (executed when called)

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What makes Java dynamic?

Java's dynamic binding allows methods to be called based on the object's actual type at runtime. This enables flexibility and extensibility in Java code.

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Study Notes

Java Portability and Security

Bytecode makes Java code secure and portable, allowing it to run on any platform that has a JVM (Java Virtual Machine) without modification.

Java Features

Platform independence, simple and familiar syntax, object-oriented design, and dynamic loading of classes are key features of Java.
Dynamic loading of classes contributes to the dynamic nature of Java.