11th Grade Core Java Quizzes, Questions & Answers

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Java Core Mock Test 4

This 'java core mock test 4' assesses knowledge on Java core concepts such as exception handling, interfaces, abstract classes, and inheritance. It is designed to test understanding of code snippets, error identification, and...

Questions: 40 | Attempts: 96 | Last updated: Dec 7, 2023

Sample Question 1
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.

Sample Question 2
1 Consider the following code snippet: interface Equalizer { boolean equals(Object o1, Object o2); } public class EqualIt { String name; public EqualIt(String name) { this.name = name; } public void TestIt() { System.out.println( new Equalizer() { public boolean equals(Object o1, Object o2) { return o1.equals(o2); } }.equals(this, this) ); } public static void main(String[] args) { new EqualIt("Welcome Planet").TestIt(); } } Which of the following will be the output of the above code snippet?

A. true

B. Welcome Planet

C. Compile-time error

D. false

Run time error

Core Java Questions: Quiz! Exam

This Core Java Questions: Quiz! Exam assesses understanding of Java constructors, annotations, and their properties. It's designed for learners to test their knowledge on fundamental Java concepts, enhancing their ability to...

Questions: 30 | Attempts: 3814 | Last updated: May 15, 2024

Sample Question 1
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

Sample Question 2
Which of the following statement is true regarding constructors?

Abstract classes cannot have constructors

Default Constructors are Optional for all classes

can be overloaded across inherited classes

Default Constructors are optional only for the classes that does not have constructors

Recent Core Java Quizzes

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: 106 | Last updated: Feb 13, 2024

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

Yes

No

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