Java Chapter 1: Introduction to Object Oriented Programming

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Questions and Answers

What type of method is showMessageDialog in the JOptionPane class?

  • Static method (correct)
  • Abstract method
  • Instance method
  • Interface method

What is the purpose of the import statement in Java?

  • To create a new object
  • To identify and locate classes used in Java programs (correct)
  • To define a new class
  • To throw an exception

What are the two groups of packages in the Java API?

  • Public and private packages
  • Core and extension packages (correct)
  • Instance and static packages
  • Abstract and interface packages

What is the purpose of the System.exit method in Java?

<p>To terminate an application (C)</p>
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What is the function of the java.lang package in Java?

<p>It is automatically imported in every Java program (A)</p>
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What is the purpose of null in the showMessageDialog method?

<p>To specify the parent component of the dialog box (B)</p>
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What is the purpose of the javax.swing.JOptionPane class in Java?

<p>To display a graphical user interface for input and output (D)</p>
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What is the main method in Java responsible for?

<p>Beginning the execution of a Java application (B)</p>
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What is the purpose of the Integer.parseInt() method in Java?

<p>To convert a string to an integer (A)</p>
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What is the purpose of the showInputDialog() method in Java?

<p>To read a string input from the user (A)</p>
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What is the import statement used for in Java?

<p>To import a package or class (C)</p>
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What is the purpose of the Addition class in the given code?

<p>To perform addition operations (C)</p>
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What is a significant feature of Java that makes it a safer programming language?

<p>Its design to be safe and portable (D)</p>
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What is the primary purpose of the Java Development Kit (JDK)?

<p>To provide a compiler for Java programming (B)</p>
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What is the name of the directory where the JDK is installed by default?

<p>C:\Program Files\Java\jdk1.6.0 (A)</p>
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What is the role of the verifier in a Java environment?

<p>To ensure bytecodes do not violate security requirements (C)</p>
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What are the five phases that a Java program undergoes?

<p>Edit, Compile, Load, Verify, Execute (D)</p>
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What is a characteristic of a Java system?

<p>Consists of environment, language APIs, and class libraries (C)</p>
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