Programming Fundamentals Quiz
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Questions and Answers

Which keyword in Java is used to instantiate objects?

  • new (correct)
  • extends
  • this
  • super

    • What is the keyword used in inheritance?

  • implements
  • extends (correct)
  • abstract
  • interface

    • What is the purpose of the try-catch block in Java?

  • To define a block of code that will be executed only if a specified condition is true
  • To define a block of code that will always be executed
  • To terminate the execution of a program
  • To handle exceptions that may occur within a block of code (correct)

    • What does the term 'method signature' refer to in Java?

    <p>The name and parameter list of a method</p> Signup and view all the answers

    Which keyword is used to prevent a class from being subclassed?

    <p>final</p> Signup and view all the answers

    What OOP concept has a base class and subclass?

    <p>Inheritance</p> Signup and view all the answers

    What is the correct way to properly connect an interface named Assessment from a class?

    <p>public class Assessment implements Compute { }</p> Signup and view all the answers

    What is the correct way to instantiate an object?

    <p>NewClass obj = new NewClass();</p> Signup and view all the answers

    What type of loop is popular for having all the components in one line?

    <p>For Loop</p> Signup and view all the answers

    What keyword in Java is used to reference a variable that is used to refer to the parent class when working with objects?

    <p>super</p> Signup and view all the answers

    What is the value at index 2 if the given array code is String names = {"Jordan", "Curry", "Lebron", "Kobe"};?

    <p>Lebron</p> Signup and view all the answers

    Which is the most restricted type of access modifier?

    <p>private</p> Signup and view all the answers

    What library is used to create an object that will let you input a value from the keyboard?

    <p>import java.util.Scanner;</p> Signup and view all the answers

    What OOP concept involves defining multiple methods with the same name but different parameter lists?

    <p>Polymorphism</p> Signup and view all the answers

    What is the correct way of creating a setter method?

    <p>public void setName(String name) { this.name = name; }</p> Signup and view all the answers

    Which OOP concept involves bundling data and methods that operate on the data into a single unit?

    <p>Encapsulation</p> Signup and view all the answers

    Study Notes

    Loops

    • For Loop is popular for having all the components in one line.
    • While Loop checks the condition first before doing the statements.

    Object-Oriented Programming (OOP) Concepts

    • Polymorphism involves defining multiple methods with the same name but different parameter lists.
    • Encapsulation bundles data and methods that operate on the data into a single unit.
    • Inheritance has a base class and subclass, creating a chain of inheritance.

    Variables and Methods

    • 'super' is the keyword used to reference a variable that is used to refer to the parent class when working with objects.
    • 'this' is used to reference the current object.
    • 'new' is the keyword used to instantiate objects.
    • A setter method is used to initialize objects of a class, and the correct way to create a setter method is public void setName(String name) { this.name = name; }.

    Arrays and Collections

    • The value at index 2 in the given array code String names = {"Jordan", "Curry", "Lebron", "Kobe"}; is Lebron.
    • The correct way to declare an ArrayList of integers in Java is ArrayList numbers = new ArrayList();.

    Access Modifiers

    • private is the most restricted type of access modifier.

    Input/Output

    • The java.util.Scanner library is used to create an object that will let you input a value from the keyboard.

    Constructors and Method Signatures

    • A constructor refers to a special method used to initialize objects of a class.
    • The method signature refers to the name and parameter list of a method.

    Inheritance and Subclassing

    • The keyword extends is used in inheritance.
    • The final keyword is used to prevent a class from being subclassed.

    Generics and Interfaces

    • Using Generics, it is not possible to create a single class that works with a specific data type.
    • The correct way to properly connect an interface named Assessment from a class is public class Assessment implements Compute{ }.
    • The correct way to create a bounded type generic class is public class Box.

    Exception Handling

    • The purpose of the try-catch block in Java is to handle exceptions that may occur within a block of code.

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    Test your knowledge of programming basics, including loop types, object-oriented programming concepts, and variable usage.

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