Get Job-ready: Java Course with 45+ Real-time Projects! - Learn Java
Dive into the world of autoboxing and unboxing in Java and see if you can master these fundamental concepts! This interactive quiz is designed to be both informative and engaging.
As you answer questions that test your understanding of how primitive data types seamlessly convert to and from their corresponding wrapper classes, you’ll gain valuable insights into your strengths and weaknesses.
Whether you’re a seasoned Java developer or just starting your programming journey, this quiz serves as a perfect platform to solidify your foundational knowledge of autoboxing and unboxing.
By tackling these challenges and learning from any missteps, you’ll be well on your way to crafting efficient and concise Java code that leverages the power of automatic conversions. So, are you ready to put your autoboxing and unboxing skills to the test? Take the quiz and embark on a rewarding learning experience! Let’s test your knowledge.
Quiz Summary
0 of 15 Questions completed
Questions:
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
Results
Results
0 of 15 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- Current
- Review / Skip
- Answered
- Correct
- Incorrect
-
Question 1 of 15
1. Question
Autoboxing technique is used for which of the following techniques ?
CorrectIncorrect -
Question 2 of 15
2. Question
class Boxing {
public static void main ( String args [ ] )
{
Integer i = 10;
int j = 5;
System.out.println(i+j);
}
}
What will be the output of the program ?
CorrectIncorrect -
Question 3 of 15
3. Question
class Function {
public void change ( Integer i )
{
System.out.println(i);
}
}
class Main {
public static void main ( String args [ ] )
{
int i = 10;
change(i);
}
}
What is the output of the program ?
CorrectIncorrect -
Question 4 of 15
4. Question
Autoboxing in Java eliminates which function in the program ?
CorrectIncorrect -
Question 5 of 15
5. Question
class Casting {
public static void main ( String args [ ] )
{
long l = 12345;
Byte b = l;
}
}
What is the output of the program ?
CorrectIncorrect -
Question 6 of 15
6. Question
class Main {
public static void main ( String args [ ] )
{
Integer i = new Integer();
i = 100;
Short s = i;
System.out.println(s);
}
}
What will be the output of the program ?
CorrectIncorrect -
Question 7 of 15
7. Question
Which of the following does not have a wrapper class in Java ?
CorrectIncorrect -
Question 8 of 15
8. Question
class AutoBox {
public void convert ( a )
{
Integer i = a:
System.out.println(“Integer Value is “ + i );
}
}
class Main {
public static void main ( String args [ ] )
{
short a = 2;
convert(a);
}
}
What is the output of the program ?
CorrectIncorrect -
Question 9 of 15
9. Question
class Box {
public static void main ( String args [ ] )
{
float f = 10;
System.out.println(f);
Integer i = f;
System.out.println(i);
Float val = f;
System.out.println(val);
}
}
What is the output of the program ?
CorrectIncorrect -
Question 10 of 15
10. Question
Which of the following are ways to achieve autoboxing in Java ?
CorrectIncorrect -
Question 11 of 15
11. Question
class Example {
public void value()
{
int a = arr.get(1);
System.out.println(a);
}
}
class Main {
public static void main ( String args [ ] )
{
ArrayList <Integer> arr = new ArrayList();
arr.add(1);
arr.add(2);
arr.add(3);
System.out.println(arr);
}
}
What is the output of the program ?
CorrectIncorrect -
Question 12 of 15
12. Question
class Unboxing {
public static void main ( String args [ ] )
{
int i = 10;
String a = i;
System.out.println(a);
}
}
What is the error in the program ?
CorrectIncorrect -
Question 13 of 15
13. Question
Autoboxing or unboxing is not possible in which of the following ?
CorrectIncorrect -
Question 14 of 15
14. Question
class Demo {
public static void main ( String args [ ] )
{
Queue < Integer > q = new priorityQueue();
q.add(10);
q.add(20);
}
}
The given program is an example of which of the following ?
CorrectIncorrect -
Question 15 of 15
15. Question
class Sample {
public static void main ( String args [ ] )
{
Integer x = 50;
int y = x;
System.out.println(y);
}
}
What is the output of the program ?
CorrectIncorrect
Summary:
So you’ve taken the Java Autoboxing and Unboxing Quiz and put your skills to the test! This quiz covered key scenarios where autoboxing and unboxing occur, including primitive type assignment to wrapper objects, method parameter passing, and arithmetic operations.
By reviewing both your correct and incorrect answers, you can gain valuable insights into your strengths and weaknesses in this crucial domain. Remember, effective learning is an ongoing process. Explore additional resources beyond the quiz to deepen your understanding. Consider online courses, tutorials, and practice problems to further solidify your grasp of autoboxing and unboxing in Java.