Correct Answer is: may be declared private

Correct Answer is: Java Decompilation Kit

Java MCQ Multiple Choice Questions Answers

Q: 1. Which of the following is TRUE?

Correct Answer is: Instance variable na mes may only contain letters and digits

Q: 3. Which of the following may be part of a class definition?

Correct Answer is: constructors

Q: 4. What is different between a Java applet and a Java application?

Correct Answer is: Please check the page for the answer.

Q: 5. What is byte code in the context of Java?

Correct Answer is: It is the code written within the instance methods of a class

Q: 6. What is garbage collection in the context of Java?

Correct Answer is: Any package imported in a program and not used is automatically deleted.

Q: 10. Output of Java Compiler is

Correct Answer is: Executable code

Q: 18. Variable path in Windows Operating System is called as ________.

Correct Answer is: Global Variable

Q: 19. Environment Variable can be set by right clicking __________ icon and then clicking on Properties menu in Windows OS.

Correct Answer is: Control Panel

Java Multiple Choice Questions (MCQs) are essential practice tools for students and exam aspirants to test and enhance their understanding of Java programming concepts.

About Java MCQ Questions

Java MCQs cover a wide range of topics, from basic syntax and data types to advanced concepts like multithreading, exceptions, and collections. These questions are designed to assess your knowledge and application skills in Java programming.

Why Practice Java Objective Questions?

Practicing Java objective questions helps you prepare for exams, interviews, and concept revision. It enhances your problem-solving skills, improves your understanding of core Java concepts, and builds your confidence in tackling real-world programming challenges.

Who Should Use These MCQs?

Java MCQ Questions for Practice

1. Which of the following is TRUE?

In java, an instance field declared public generates a compilation error
int is the name of a class available in the package java.lang
Instance variable na mes may only contain letters and digits
A class has always a constructor (possibly automatically supplied by the java compiler).

2. A constructor

must have the same name as the class it is declared within.
is used to create objects.
may be declared private
A, B and C

3. Which of the following may be part of a class definition?

instance variables
instance methods
constructors
all of the above

4. What is different between a Java applet and a Java application?

An application can in general be trusted whereas an applet cant
An applet must be executed in a browser environment
An applet is not able to access the files of the computer it runs on
A, B, and C

5. What is byte code in the context of Java?

The type of code generated by a Java compiler
The type of code generated by a Java Virtual Machine
It is another name for a Java source file
It is the code written within the instance methods of a class

6. What is garbage collection in the context of Java?

The operating system periodically deletes all of the java files available on the system
Any package imported in a program and not used is automatically deleted.
When all references to an object are gone, the memory used by the object is automatically reclaimed
The JVM checks the output of any Java program and deletes anything that doesnt make sense

7. JDK stands for

Java Debugging Kit
Java Developers Kit
None of these
Java Decompilation Kit

8. JVM is a

Debugger
Assembler
Interpreter
Compiler

9. Bytecode is given as input to

JRE
linker
JVM
Assembler

10. Output of Java Compiler is

Non executable code
Executable code

11. Output of Java Compiler is executable

true
false

12. Bytecode is a set of highly optimizable code. True or false

true
false

13. The JVM needs to be implemented for each platform

true
false

14. JVM will differ from platform to platform but still all understand the Same Java Bytecode

true
false

15. The compiler and other java development tools reside in _________ sub-folder.

jre
bin
docs
demo

16. The library containing the files needed to integrate Java with programs written in other languages resides inside following sub folder.

jre
bin
include
lib

17. We can set class path of java by setting following variable.

javapath
class
path
java

18. Variable path in Windows Operating System is called as ________.

Environment Variable
Local Variable
Instance Variable
Global Variable

19. Environment Variable can be set by right clicking __________ icon and then clicking on Properties menu in Windows OS.

Internet Explorer
Recycle Bin
Control Panel
My Computer

20. Arrange the following statements in correct order. 1. Running the java command Statement. 2. Main method of that class is executed Statement. 3. JRE is loaded along with the class you specify.

Statement: 2 1 3
Statement: 1 3 2
Statement: 1 2 3
Statement: 3 2 1

21. We can compile java program with following command

java-version
javac
jre
java

22. Class file must have extension ______.

.sample.class
.class
.cls
.java

23. The name of the class file is created automatically when you compile the program with the javac command.

true
false

24. _ is a compiled Java program that can be executed by the _ command.

class file & javac
class file & java
source file & java
source file & javac

25. Java source code is compiled into _______.

Bytecode
.exe
Source code
.obj

26. Which of the tool is used to compile java code?

javac
jar
java
javadoc

27. Which of the following tool used to execute java code.

javadoc
java
rmic
javac

28. Which of the following is used to interpret and execute Java Applet Classes hosted by HTML.

appletshow
appletscreen
appletviewer
appletwatcher

29. HTML based Java Documentary help can be accessed using

none of these
javadoc
javahelp
javamanual

30. jar stands for ________.

none of these
Java Archive
Java Application Runner
Java Archive Runner

Java MCQ Multiple Choice Questions Answers | Quiz for Practice

About Java MCQ Questions

Why Practice Java Objective Questions?

Who Should Use These MCQs?

Java MCQ Questions for Practice

1. Which of the following is TRUE?

2. A constructor

3. Which of the following may be part of a class definition?

4. What is different between a Java applet and a Java application?

5. What is byte code in the context of Java?

6. What is garbage collection in the context of Java?

7. JDK stands for

8. JVM is a

9. Bytecode is given as input to

10. Output of Java Compiler is

11. Output of Java Compiler is executable

12. Bytecode is a set of highly optimizable code. True or false

13. The JVM needs to be implemented for each platform

14. JVM will differ from platform to platform but still all understand the Same Java Bytecode

15. The compiler and other java development tools reside in _________ sub-folder.

16. The library containing the files needed to integrate Java with programs written in other languages resides inside following sub folder.

17. We can set class path of java by setting following variable.

18. Variable path in Windows Operating System is called as ________.

19. Environment Variable can be set by right clicking __________ icon and then clicking on Properties menu in Windows OS.

20. Arrange the following statements in correct order. 1. Running the java command Statement. 2. Main method of that class is executed Statement. 3. JRE is loaded along with the class you specify.

21. We can compile java program with following command

22. Class file must have extension ______.

23. The name of the class file is created automatically when you compile the program with the javac command.

24. _ is a compiled Java program that can be executed by the _ command.

25. Java source code is compiled into _______.

26. Which of the tool is used to compile java code?

27. Which of the following tool used to execute java code.

28. Which of the following is used to interpret and execute Java Applet Classes hosted by HTML.

29. HTML based Java Documentary help can be accessed using

30. jar stands for ________.

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Java MCQ Multiple Choice Questions Answers | Quiz for Practice

About Java MCQ Questions

Why Practice Java Objective Questions?

Who Should Use These MCQs?

Java MCQ Questions for Practice

1. Which of the following is TRUE?

2. A constructor

3. Which of the following may be part of a class definition?

4. What is different between a Java applet and a Java application?

5. What is byte code in the context of Java?

6. What is garbage collection in the context of Java?

7. JDK stands for

8. JVM is a

9. Bytecode is given as input to

10. Output of Java Compiler is

11. Output of Java Compiler is executable

12. Bytecode is a set of highly optimizable code. True or false

13. The JVM needs to be implemented for each platform

14. JVM will differ from platform to platform but still all understand the Same Java Bytecode

15. The compiler and other java development tools reside in _________ sub-folder.

16. The library containing the files needed to integrate Java with programs written in other languages resides inside following sub folder.

17. We can set class path of java by setting following variable.

18. Variable path in Windows Operating System is called as ________.

19. Environment Variable can be set by right clicking __________ icon and then clicking on Properties menu in Windows OS.

20. Arrange the following statements in correct order. 1. Running the java command Statement. 2. Main method of that class is executed Statement. 3. JRE is loaded along with the class you specify.

21. We can compile java program with following command

22. Class file must have extension ______.

23. The name of the class file is created automatically when you compile the program with the javac command.

24. _______ is a compiled Java program that can be executed by the _______ command.

25. Java source code is compiled into _______.

26. Which of the tool is used to compile java code?

27. Which of the following tool used to execute java code.

28. Which of the following is used to interpret and execute Java Applet Classes hosted by HTML.

29. HTML based Java Documentary help can be accessed using

30. jar stands for ________.

Your Score

Related Quiz Topics

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24. _ is a compiled Java program that can be executed by the _ command.