JAVA-EFC CHENNAI-BATCH3 DATED 07TH NOV 2024 - MSME

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JAVA-EFC-CHENNAI BATCH3-07TH NOVEMBER 2024

1 / 50

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

2 / 50

Array in Java is ______________

Collection of similar elements

Collection of elements of different types

The data type of consisting of characters

None of these

3 / 50

Which Java method is used to detect the OS in which the Java program is being run?

system.getOSdetails()

system.get(os.name)

system.getProperties("os.name")

system.getProperties("os")

4 / 50

What is a set in Java?

Represented in the form of values

Used to store key-value pairs

Primary structures

All of these

5 / 50

What will be the output of the following Java code?

public class Main {
public static void main(String[] args) {
System.out.println(Math.copySign(100.6, -200.6));
}

100.6

-100.6

-200.6

200.6

6 / 50

Multithreading in java is _______________

Executing multiple processes simultaneously

Creating more threads at a time

Blocking threads

All of these

7 / 50

Which thread is executed in the background?

New thread

User-created thread

Daemon thread

All of these

8 / 50

The trim() method in Java used to ______________

Remove the given character

Remove the values after the given index

Remove leading and trailing spaces

None of these

9 / 50

Can we keep a different name for the java class name and java file
name?

Yes

10 / 50

_____ is used to find and fix bugs in the Java programs.

JVM

JRE

JDK

JDB

11 / 50

Finally block is attached to?

Try-catch block

Class block

Method block

All of these

12 / 50

Which Java method is used to get the version of running java VM?

System.vm.version

System.getProperties("vm.version")

System.getProperties("java.vm.version")

System.getVmVersion

13 / 50

Which Java method is used to clear the element of ArrayList?

deleteAll()

delete()

clearAll()

clear()

14 / 50

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

Scanner

Input

Applier

None of these

15 / 50

Which of the following sorts the elements were inserted?

Hashtable

Map

Array

None of these

16 / 50

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

17 / 50

Which of the following methods is used to extract the length of a stringin Java?

length()

len()

sizeof()

size()

18 / 50

Jar in java stands for ____________

Java Archive

Java application runtime

Java application runner

None of these

19 / 50

Which of the following can be declared as final in java?

Class

Method

Variable

All of these

20 / 50

Is string mutable in Java?

Yes

21 / 50

Which of the following option leads to the portability and security of Java?

Bytecode is executed by JVM

The applet makes the Java code secure and portable

Use of exception handling

Dynamic binding between objects

22 / 50

Can the Java program accept input from the command line?

Yes, using command-line arguments

Yes, by access command prompt

None of these

23 / 50

Which method is used to convert radians to degree in Java?

convertRadtoDeg()

toDegrees()

degree()

All of these

24 / 50

What is the entry point of a program in Java?

main() method

The first line of code

Last line of code

main class

25 / 50

Which of these is a property of threads in Java?

Multiple threads can be executed concurrently

Has its own priority

Both A. and B

None of these

26 / 50

Which escape character is used for word character in regex?

/str

27 / 50

JRE stands for _______________

Java run ecosystem

JDK runtime Environment

Java Runtime Environment

None of these

28 / 50

What makes the Java platform independent?

Advanced programming language

It uses bytecode for execution

Class compilation

All of these

29 / 50

Multiline comment is created using ________________

/* */

All of these

30 / 50

What is the full form of AWT?

Absolute window toolKit

Abstract window toolKit

Absolute wear kit

Abstract window tools

31 / 50

Method used to take a string as input in Java?

next()

nextLine()

Both A. and B.

None of these

32 / 50

Which Java method is used to add all of the specified elements to thespecified collection?

addValue()

copy()

cpy()

addAll()

33 / 50

What is a map in Java?

Data structure

Defined in java.util package

Represented using key-value pairs

All of these

34 / 50

What will be the output of the 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

35 / 50

The result of dividing by 0 in Java is _____________

Error

Expectation

Infinite

None of these

36 / 50

Can the main() method be overloaded in Java?

Yes

37 / 50

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

var name;

int name;

var name int;

All of these

38 / 50

Which Java keyword is used to access the features of a package?

get

import

extends

All of these

39 / 50

Which method in Java is used to get the name of the running Java VM?

System.getProperties("java.vm.name")

System.vmName

Sytem.getVmName

System.getProperties("vm.name")

40 / 50

Which of these is a type of variable in Java?

Instance Variable

Local Variable

Static Variable

All of these

41 / 50

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

42 / 50

JDK stands for _________________

Java development kit

Java deployment kit

JavaScript deployment kit

None of these

43 / 50

Which of the following is not a Java features?

Dynamic

Architecture Neutral

Use of pointers

Object-oriented

44 / 50

What are regexes in Java?

API to define a pattern for searching strings

String

Array to create a new integer

Wrapper class

45 / 50

What are the types of memory allocated in memory in java?

Heap memory

Stack memory

Both A and B

None of these

46 / 50

Can we write a program without a main method in Java?

Yes

47 / 50

What is the default encoding of OutstreamWriter?

UTF-32

UTF-16

UTF-12

Based on the host platform

48 / 50

What will be the output of the following Java code?

public class Main {
public static void main(String[] args) {
String str = "Hello" ;
str = "Bye";

System.out.println(str);
}
}

Hello

Bye

Error

All of these

49 / 50

Which keyword in Java is used for exception handling?

exep

excepHand

throw

All of these

50 / 50

Which type of casting is lossy in Java?

Widening typecasting

Narrowing typecasting

Manual typecasting

All of these

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