Core Java Quizzes, Questions & Answers

Calling all I.T. specialists! What programming language is your field of expertise? Are someone who's goal oriented? Hopefully, you're object oriented too! Nah... Just kidding! But we're not joking when we tell you we have quizzes about "Core Java"... You have a heap to choose from too! Ready to start out with some basics?

Say "Hello World!" to topics on syntax and semantics. Too easy for you? How about quizzes on some special classes? Applets and servlets; Let's give it a go? There are other quizzes on the Java Platform, libraries, and others too. Get ready to initialize! Do you think you are on a "class" of your own when it comes to knowledge in "Core Java"? Find out when you take on our quizzes... Good luck!

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Core Java Questions: Quiz! Exam

Questions: 30 | Attempts: 3773 | Last updated: Mar 22, 2023

Sample Question
Consider the following listed items: A. Employee() { } B. public Employee() { } C. private Employee() { } Consider the following statements: I. no-argument constructor, that does not allow instantiation from within the package II. no-argument constructor, that does not allow instantiation from outside the package III. no-argument constructor Which of the following option gives the exact matches of above listed items and statements? Consider the following listed items: A. Employee() { } B. public Employee() { } C. private Employee() { } Consider the following statements: I. no-argument constructor, that does not allow instantiation from within the package II. no-argument constructor, that does not allow instantiation from outside the package III. no-argument constructor Which of the following option gives the exact matches of above listed items and statements?{

A-I, B-II, C-III

A-III, B-I, C-II

A-II, B-III, C-I

A-II, B-I, C-III

Core Java Mock Test-3

INTRODUCTION TO OOPS INTRODUCTION TO JAVA AND SDE LANGUAGE FUNDAMENTALS AND OPERATORS

Questions: 45 | Attempts: 666 | Last updated: Sep 5, 2023

Sample Question
Consider the following code: 1. class Test { 2. public static void main(String args[]) { 3. double d = 12.3; 4. Dec dec = new Dec(); 5. dec.dec(d); 6. System.out.println(d); 7. } 8. } 9. class Dec{ 10. public void dec(double d) { d = d - 2.0d; } 11. } Which of the following gives the correct value printed at line 6?

Prints: 12.3

Prints: -2.0

Prints: 10.3

Prints: 0.0

An Advanced Quiz On Core Java!

JAVA is everywhere, from your microwave oven to DVD player, TV remotes to music players, almost everywhere JAVA is used. Well, cut to short, Core Java focuses on the language basics such as data structures, data types, operators,...

Questions: 45 | Attempts: 742 | Last updated: Mar 21, 2023

Sample Question
Which of the following are uses of Object class?(Choose 3)

To achieve inheritance at user-defined class level

To generate String representation of an object

To get the HashCode for an object

To achieve polymorphism at user-defined class level

To handle any Java Object in the name of Object

Core Java Full Mock Test1

Questions: 35 | Attempts: 128 | Last updated: Mar 21, 2023

Sample Question
Which statement is true?

A class's finalize() method CANNOT be invoked explicitly.

Super.finalize() is called implicitly by any overriding finalize() method.

The finalize() method for a given object is called no more than once by the garbage collector.

The order in which finalize() is called on two objects is based on the order in which the two objects became finalizable.

Choose Correct Answer Core Java

Pls do the correction if the answer is wrong in core java.

Questions: 25 | Attempts: 696 | Last updated: Mar 22, 2023

Sample Question
Which of the following may override a method whose signature is void xyz (float f)?1.void xyz(float f)2.public void xyz(float f3,private void xyz(float f)

1, 2

2, 3

3

1,3

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Essentials Of Core Java

Essentials of Core Java

Quiz based on must know concepts of Core Java covering almost all essential aspects of programming language. Make sure you come out with flying colors :) Passing: 70% Time: 30 Minutes

Questions: 35 | Attempts: 101 | Last updated: Feb 13, 2024

Sample Question
Is it possible to have abstract static method for a class?

Yes

No

Basics Of Core Java

Basics of Core Java

Simple Quiz based on basics of Core Java covering almost all important aspects of programming language.Make sure to come out with flying colors.Passing: 80%Time: 30 Minuteswww.java-interviewer.blogspot.com

Questions: 50 | Attempts: 216 | Last updated: Mar 22, 2023

Sample Question
You would use Java because?

It is platform independant

It follows OOPs

It is Open Source

Core Java MCQ Basics Questions

Core Java MCQ Basics questions

Are you looking for ways to advance your Java MCQ knowledge? The quiz below is set and designed not only to test your Java MCQ knowledge but to also advance it. All the best and enjoy learning.

Questions: 25 | Attempts: 597 | Last updated: Mar 22, 2023

Sample Question
What all gets printed when the following gets compiled and run? public class test { public static void main(String args[]) { int i=1, j=1; try { i++; j--; if(i/j > 1) i++; } catch(ArithmeticException e) { System.out.println(0); } catch(ArrayIndexOutOfBoundsException e) { System.out.println(1); } catch(Exception e) { System.out.println(2); } finally { System.out.println(3); } System.out.println(4); } } here

0 2 3 4

3 4

0 3 4

0 3

Core Java MCQ Practice Questions

Core Java MCQ practice questions

Java MCQ is one of the commonly used computer-programming tools used by programmers today. If you are a programmer seeking to become better in your line of duty, then this quiz will bring you closer to you goal.

Questions: 25 | Attempts: 474 | Last updated: Sep 7, 2023

Sample Question
What all gets printed when the following gets compiled and run? public class test { public static void main(String args[]) { int i=1, j=1; try { i++; j--; if(i/j > 1) i++; } catch(ArithmeticException e) { System.out.println(0); } catch(ArrayIndexOutOfBoundsException e) { System.out.println(1); } catch(Exception e) { System.out.println(2); } finally { System.out.println(3); } System.out.println(4); } } here

0 2 3 4

3 4

0 3 4

0 3

Evaluate Your Knowledge Of Core Java

evaluate your knowledge of Core Java

Questions: 5 | Attempts: 321 | Last updated: Mar 22, 2023

Sample Question
Which is the correct way to declare and store a character value to a variable?

Char ch="A"

Char ch='A'

Char [] ch='A'

Char []ch="A"

Core Java Test 6

CORE JAVA TEST 6

Questions: 40 | Attempts: 250 | Last updated: Mar 22, 2023

Sample Question
What happens when this code is compiled and executed? String name = null; File file = new File("/folder", name); System.out.print(file.exists());

A.It prints “true”.

B.It prints “false”.

C.NullPointerException at second line.

D.NullPointerException at third line.

Java Core Mock Test 4

java core mock test 4

Questions: 40 | Attempts: 88 | Last updated: Dec 7, 2023

Sample Question
Under which of the following scenarios a checked exception is thrown? (Choose 2)

A. Given username and password is checked with database and found invalid

B. 5th element of an array is accessed, whose size is 3

C. length() method is called on a String object, that is assigned to null

D. A file that actually does not exist, is opened for reading

E. An attempt to connect to the database is made but failed.

Core Java Test 4

CORE JAVA TEST 4

COLLECTION UTILITY PACKAGE

Questions: 40 | Attempts: 637 | Last updated: Sep 7, 2023

Sample Question
Which statements are true about comparing two instances of the same class,given that the equals() and hashCode() methods have been properly overridden? (choose all that apply)

If the equals()methood returns true,the hashCode() comparison==might return false.

If the equals()methood returns false,the hashCode() comparison==might return true.

If the hashCode() comparison==returns true,the equals() method must return true

If the hashCode() comparison==returns true,the equals() method might return true

If the hashCode() comparison!=returns true,the equals() method must return true

Java Core Mock Test-3

java core mock test-3

Access Specifers, Constructors and method

Questions: 35 | Attempts: 138 | Last updated: Mar 22, 2023

Sample Question
Which access modifier have almost identical behaviour as that of default.?

Protected

Public

Private

Both public and protected

Core Java Hardest Test: Trivia Quiz!

Do you know the core Java language? Java is a classed based language that was made to have minimum implementation dependencies. It is a general-purpose programming language that allows application developers to run anywhere....

Questions: 40 | Attempts: 145 | Last updated: Mar 21, 2023

Sample Question
Choose the possible constructor arguments of the Float wrapper class.

Float

Double

String

Int

Byte

Core Java Quizzes, Questions & Answers

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