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Questions and Answers
What does the keyword 'new' do in the context of variable declarations in Java?
What does the keyword 'new' do in the context of variable declarations in Java?
- It defines a method within a class.
- It creates an object instance from a class. (correct)
- It converts a primitive type to an object.
- It initializes a variable with a static value.
Which of the following statements is true about the Scanner class in Java?
Which of the following statements is true about the Scanner class in Java?
- It can only read data from user input.
- It is only used for reading files.
- It can only read entire lines of text.
- It translates bytes from various sources into data. (correct)
How are parameters and arguments related to methods in Java?
How are parameters and arguments related to methods in Java?
- Parameters and arguments are the same in Java.
- Parameters are actual values while arguments are variables.
- Parameters define how many arguments can be passed. (correct)
- Arguments specify what type of parameters are accepted.
Which of the following best describes the term 'access modifier' in Java?
Which of the following best describes the term 'access modifier' in Java?
What is the purpose of the 'if' selection statement in Java?
What is the purpose of the 'if' selection statement in Java?
In Java, what is the role of the 'main' method?
In Java, what is the role of the 'main' method?
Which of the following correctly describes the equality operator in Java?
Which of the following correctly describes the equality operator in Java?
What is the effect of declaring an instance variable as 'private' in Java?
What is the effect of declaring an instance variable as 'private' in Java?
What is the main purpose of the Java virtual machine (JVM)?
What is the main purpose of the Java virtual machine (JVM)?
What does the 'Void' keyword indicate in a Java method?
What does the 'Void' keyword indicate in a Java method?
Which of the following is NOT a characteristic of Java class libraries?
Which of the following is NOT a characteristic of Java class libraries?
What does the 'import' statement do in a Java program?
What does the 'import' statement do in a Java program?
Which statement accurately describes the Java class structure?
Which statement accurately describes the Java class structure?
How are comments treated in Java programs?
How are comments treated in Java programs?
What is the role of the main method in a Java application?
What is the role of the main method in a Java application?
What will happen if a String in Java spans multiple lines of code?
What will happen if a String in Java spans multiple lines of code?
Flashcards
Software
Software
A set of instructions that tells a computer what to do.
Hardware
Hardware
The physical components of a computer system, such as the keyboard, monitor, and CPU.
Method
Method
A block of code that performs a specific task.
Class
Class
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Attributes
Attributes
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Java Class Libraries
Java Class Libraries
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Compiler
Compiler
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Integrated Development Environment (IDE)
Integrated Development Environment (IDE)
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Package
Package
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Constructor
Constructor
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Main Method
Main Method
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Static Variable
Static Variable
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Data Hiding
Data Hiding
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Set and Get Methods
Set and Get Methods
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Study Notes
Java Fundamentals
- Java is a widely used programming language.
- Software is the set of instructions written to be carried out by the computer.
- Hardware are the computers themselves.
Methods and Classes
- Tasks are performed by methods.
- Methods contain program statements, hidden from the user.
- Methods are grouped inside classes.
- Classes are reused to create many objects, saving time and effort.
Objects and Attributes
- Objects have attributes (characteristics) defined by the class's instance variables.
- The class specifies the attributes of the object.
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Description
Test your knowledge on the basics of Java programming, including methods, classes, objects, and their attributes. This quiz covers core concepts essential for understanding Java's structure and functionality.
