Java

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JAVA

ASSESSMENT

(YOU HAVE ONLY 30 MINUTES TO COMPLETE THIS PART [20 Questions])

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1. JRE stands for ___.

Java run ecosystem

JDK runtime Environment

Java Runtime Environment

None of these

2. Wrapper class in java is ___.

Used to encapsulate primitive data types

Declare new classes called wrapper

Create a new instance of the class

None of these

3. Static variables in java are declared as ___.

final variables

new variables

Constants

All of these

4. Boxing is ___.

Creating new box

Creating object

Converting primitive type of object instance

All of these

5. How can we access methods for file handling in java?

Java.files

Java.io

Java.io.File

Java.FileHandling

6. Which keyword in java is used for exception handling?

exep

excepHand

throw

All of these

7. Can the main() method be overloaded in Java?

Yes

8. Which class in Java is used to take input from the user?

Scanner

Input

Applier

None of these

9. The 'super' keyword is used to ___.

Access instance of the parent class

Access instance of the same class

Access instance of child class

Access instance of friend class

10. BigInteger Class is used to ___.

Store very long range of number

Store integer values

A class that stores large range of integer

All of these

11. 'this' keyword in java is ___.

Used to hold the reference of the current object

Holds object value

Used to create a new instance

All of these

12. Which of the following is the correct syntax to create a variable in Java?

var name;

int name;

var name int;

All of these

13. What is garbage collection in java?

Method to manage memory in java

Create new garbage values

Delete all values

All of these

14. Abstract class is ___.

Created using abstract keyword

Contains only abstract method

Needs to be inherited to be used

All of these

15. The super() method is used to ___.

Call constructor of friend class

Is a declared method

Call constructor of the parent class

Call constructor

16. What will be the output of following Java code?public class Main {
public static void main(String arg[]) {
int i;
for (i = 1; i <= 12; i += 2) {
if (i == 8) {
System.out.println(i);
break;
}
}
}
}

No output

1357911

17. What is type casting in Java?

It is converting type of a variable from one type to another

Casting variable to the class

Creating a new variable

All of these

18. Which of these is the correct method to create an array in java?

int[] arr = {1, 3, 5};

int[] arr;

arr = new int[] {3, 1, 8};

int arr[] = {1, 4, 6};

All of these

19. The break statement in Java is used to ___.

Terminates from the loop immediately

Terminates from the program immediately

Skips the current iteration

All of these

20. What is file handling in java?

It is creating, deleting, and modifying files using a java program.

Creating new method

Filing method to different file to extract them better

All of these

5 out of 4

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