Java Operators

Java Control Statements

Object Oriented Programming

Java Built-in Classes

Java File Handling

Java Error & Exceptions

Java Multithreading

Java Synchronization

Java Networking

Java Collections

Java Interfaces

Java Data Structures

Java Collections Algorithms

Advanced Java

Java Miscellaneous

Java APIs & Frameworks

Java Class References

Java Useful Resources

Java Online Quiz



Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.

Questions and Answers

Answer : A

Explaination

A class is a blue print from which individual objects are created. A class can contain fields and methods to describe the behavior of an object.

Q 2 - Can we have multiple classes in same java file?

A - True

B - False

Answer : A

Explaination

True, a java file can contain one public class and many other non-public classes.

Q 3 - What is the default value of short variable?

A - 0.0

B - 0

B - null

B - undefined

Answer : B

Explaination

Short variable has default value of 0 if defined as an instance/static variable.

Answer : C

Explaination

By default, variables, methods and constructors can be accessed by any class lying in the same package.

Answer : A

Explaination

Class variables are variables declared with in a class, outside any method, with the static keyword.

Q 6 - Can be constructor be made final?

A - True.

B - False.

Answer : B

Explaination

No, this is not possible.

Answer : A

Explaination

Static binding occurs during Compile time.

Answer : D

Explaination

A thread can enter the waiting state by invoking its sleep() method, by blocking on IO, by unsuccessfully attempting to acquire an object's lock, or by invoking an object's wait() method. It can also enter the waiting state by invoking its (deprecated) suspend() method.

Q 9 - Can constructor be inherited?

A - True.

B - False.

Answer : B

Explaination

No, constructor cannot be inherited.

Answer : B

Explaination

A program is expected to recover if an exception occurs.

java_questions_answers.htm
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