Java Quiz: From Basics to Hard! 28 MCQs to Test Your Knowledge - It's Quize

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Related:Test Your Knowledge with 39 True/False Questions about JavaScript | JavaScript Quiz

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Java Quiz

What is Java?

Programming language

Coffee brand

Operating system

Database management system

What is the main purpose of Java?

Web development

Desktop application development

Mobile app development

Cross-platform programming

What is a class in Java?

Object that defines properties and methods

Basic data type

Conditional statement

Looping statement

What is an object in Java?

Instance of a class

Primitive data type

Relational operator

Bitwise operator

What is the syntax for creating an object in Java?

new ClassName()

create ClassName()

object ClassName()

make ClassName()

What is inheritance in Java?

Mechanism for reusing code

Data structure for storing objects

Method for sorting arrays

Function for calculating math expressions

What is a constructor in Java?

Method for creating objects

Data type for storing strings

Conditional statement

Looping statement

What is encapsulation in Java?

Hiding implementation details from the user

Process of defining a class hierarchy

Process of creating new objects

Process of inheriting properties from a parent class

What is a method in Java?

Block of code that performs a specific task

Data structure for storing elements

Keyword for creating loops

Keyword for creating conditional statements

What is the name of Java's package manager?

Maven

Gradle

Ant

Ivy

What keyword is used to define a constant in Java?

final

const

static

var

What is the default value of a boolean variable in Java?

false

true

0

null

What is the name of Java's built-in testing framework?

JUnit

TestNG

Cucumber

Spock

What is the name of the Java virtual machine's just-in-time (JIT) compiler?

HotSpot

JRockit

OpenJ9

GraalVM

What is the name of Java's built-in serialization mechanism?

Java Serialization

Gson

Jackson

Protobuf

What is the name of the method used to start a Java thread?

start

run

execute

begin

What is the name of the design pattern used to create objects without using a constructor?

Factory

Singleton

Builder

Prototype

What is the name of the keyword used to create a subclass in Java?

extends

implements

abstract

super

What is the name of the method used to read input from the console in Java?

Scanner.nextLine()

System.in.read()

BufferedReader.readLine()

Console.read()

What is the name of the design pattern used to decouple an abstraction from its implementation?

Bridge

Decorator

Adapter

Facade

What does JDK stand for?

Java Development Kit

Java Debugging Kit

Java Deployment Kit

Java Database Kit

What is the purpose of a constructor?

Object initialization

Exception handling

Code debugging

Memory management

What is a static method?

Method that belongs to the class

Method that belongs to an object

Method that can be overridden

Method that can be abstract

What is the difference between an abstract class and an interface?

Abstract class can have method implementations, interface cannot

Interface can have method implementations, abstract class cannot

Abstract class can be instantiated, interface cannot

Interface can be extended, abstract class cannot

What is the difference between equals() and == in Java?

equals() compares the values of objects, == compares the references

equals() compares the references of objects, == compares the values

equals() is used for primitive types, == is used for objects

equals() is used for objects, == is used for primitive types

What is a try-catch block used for?

Exception handling

Object instantiation

Variable declaration

Code optimization

What is the purpose of the final keyword?

Prevent modification of values or methods

Indicate a method can be overridden

Indicate a class cannot be extended

Indicate a variable cannot be initialized

What is the purpose of the keyword this?

Refer to the current object

Refer to the superclass object

Refer to a method parameter

Refer to a local variable

Related:Java Quiz: From Basics to Hard! 28 MCQs to Test Your Knowledge

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