Java basics

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Java Basics Quiz

Test your knowledge of Java fundamentals with our engaging quiz! Whether you are a beginner or looking to refresh your skills, this quiz covers the essential topics you need to know.

Multiple choice and checkbox questions
Instant feedback on your answers
Perfect for students and enthusiasts alike

31 Questions8 MinutesCreated by CodingWizard42

Is JVM, a compiler or interpreter ?

Compiler

Interpretor

What is Java bytecode ?

Character

Binary number

Integer

Some value

Is Java a compiler or an Interpreter ?

Both

Compiler

Interpreter

None

Why is Java considered Portable Language ?

True

False

How many additions of java?

Java Architecture consists of mainly these components:

Jdk,jre,jvm

Jse,jme,jee

Both

None

Feature of jvm is:

Write any where

Write multiple time

Write once and run anywhere

None

Number of primitive data types in Java are?

What is the size of float and double in java?

32&64

32&32

64&64

8&16

Automatic type conversion is possible in which of the possible cases?

Byte to int

Int to long

Long to int

Short to int

Find the output of the following code. int Integer = 24; char String = ‘I’; System.out.print(Integer); System.out.print(String);

Throws error

No o/p

24 I

Which of the following option leads to the portability and security of Java?

Bytecode is executed by JVM

The applet makes the Java code secure and portable

Use of exception handling

Dynamic binding between objects

Which of the following is a valid declaration of a char?

Char ch = '\utea';

Char ca = 'tea';

Char cr = \u0223;

Char cc = '\itea';

Which of the following is a valid long literal?

ABH8097

L990023

904423

0xnf029L

What does the expression float a = 35 / 0 return?

Infinity

Not a number

Error

Which of these cannot be used for a variable name in Java?

identifier & keyword

Identifier

keyword

None

JDK stands for ____.

Java development kit

Java deployment kit

JavaScript deployment kit

None

What is the entry point of a program in Java?

Main() method

The first line of code

Last line of code

Main class

Which class in Java is used to take input from the user?

Array

Class

Main

Scanner

Method used to take a string as input in Java?

Next()

NextLine()

A and b

None

What will be the output of following Java code? Public class Main { public static void main(String[] args) { String str = "Hello"; str = "Bye"; System.out.println(str); } }

Bye

Hello

Error

None

What is type casting in Java?

It is converting type of a variable from one type to another

Casting variable to the class

Creating a new variable

All of these

who is the father of java?

James gosling

Charles babbage

Lava was earlier known as

Oak

Pine

Palm

None

What is garbage collection?

Garbage collection is a process which is performed for memory management. It is used for reclaiming the runtime unused objects.

Is a program that converts code written in "Java Assembly Language" into a valid Java . Class file.

A sequence of characters in the code that identifies a variable, function, or property.

Taking words in their usual or most basic sense

Java is case sensitive langauge

Yes

Java is case sensitive langauge

True

False

The command javac is used to

Compile

Run

None

An assembler is a program that takes basic computer instructions and converts them into a pattern of bits that the computer's processor can use to perform its basic operations.

True

False

"void" excepts some thing in return

True

False

Java basics

Java Basics Quiz

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