JAVA EC MADURAI OCT BATCH1 DATED 01ST MARCH 2025 - MSME

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JAVA- EC MADURAI OCT BATCH1 -01ST MARCH 2025

1 / 50

Which keyword in Java is used for exception handling?

exep

excepHand

throw

All of these

2 / 50

Which of the following is true about the try-catch block?

A try block must be followed by at least one catch block

A try block must be followed by either a catch or a finally block

A try block cannot be used without a catch block

A try block cannot contain another try-catch block

3 / 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

4 / 50

JRE stands for _______________

Java run ecosystem

JDK runtime Environment

Java Runtime Environment

None of these

5 / 50

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

Yes

6 / 50

Which of the following is responsible for garbage collection in Java?

JVM

JIT

JDK

JRE

7 / 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

8 / 50

Which of these is a type of variable in Java?

Instance Variable

Local Variable

Static Variable

All of these

9 / 50

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

Heap memory

Stack memory

Both A and B

None of these

10 / 50

What is the correct way to manually request garbage collection in Java?

System.free();

Runtime.getRuntime().gc();

System.gc();

finalize();

11 / 50

Which of the following is the correct way to exit from all nested loops?

Use multiple break statements

Use labeled break statement

Use exit() method

Nested loops cannot be exited together

12 / 50

Is string mutable in Java?

Yes

13 / 50

What is the purpose of the finalize() method in Java?

To execute code after the program terminates

To execute code before an object is garbage collected

To finalize the class implementation

To finalize a loop

14 / 50

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

Yes

15 / 50

What will happen if an exception is thrown and not caught in a try-catch block?

The program will ignore the exception and continue executing

The program will terminate immediately

The exception will be caught by the JVM

The exception will be thrown to the caller of the method

16 / 50

What is the entry point of a program in Java?

main() method

The first line of code

Last line of code

main class

17 / 50

Which keyword is used to handle exceptions in Java?

try

catch

throw

All of the above

18 / 50

JDK stands for _________________

Java development kit

Java deployment kit

JavaScript deployment kit

None of these

19 / 50

Which of the following statements is true?

An abstract class can implement an interface

An interface can extend a class

An abstract class cannot extend another abstract class

An interface can extend multiple classes

20 / 50

Can the main() method be overloaded in Java?

Yes

21 / 50

An abstract class in Java:

Cannot have any concrete methods

Can be instantiated directly

Can have both abstract and concrete methods

Cannot have constructors

22 / 50

Which command is used to compile a Java program?

java

javac

javadoc

jar

23 / 50

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

Class

Method

Variable

All of these

24 / 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

25 / 50

Which type of casting is lossy in Java?

Widening typecasting

Narrowing typecasting

Manual typecasting

All of these

26 / 50

Which of the following is a consequence of garbage collection?

Faster program execution

Memory leaks

Automatic memory deallocation

Manual memory management

27 / 50

Method used to take a string as input in Java?

next()

nextLine()

Both A. and B.

None of these

28 / 50

Which keyword is used to implement an interface in Java?

implements

extends

inherits

overrides

29 / 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

30 / 50

What makes the Java platform independent?

Advanced programming language

It uses bytecode for execution

Class compilation

All of these

31 / 50

Which of the following is true about String objects in Java?

Strings are mutable

Strings are immutable

Strings are reference types and mutable

Strings are value types and immutable

32 / 50

Where are Java source files stored by convention?

.java extension files

.class extension files

.jar extension files

.exe extension files

33 / 50

Which block is used to specify a code that must be executed regardless of an exception being handled or not?

try

catch

finally

throw

34 / 50

What does the concat() method do in Java?

Combines two strings

Compares two strings

Copies a string

Converts a string to uppercase

35 / 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

36 / 50

What does the java command do?

Compiles Java code

Executes Java bytecode

Documents Java code

Packages Java classes

37 / 50

In Java, objects are stored in:

Stack memory

Heap memory

Cache memory

38 / 50

Which method is used to compare two strings in Java?

equals()

compareTo()

isEqual()

Both a and b

39 / 50

Which of the following is a checked exception in Java?

ArithmeticException

NullPointerException

IOException

ArrayIndexOutOfBoundsException

40 / 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

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

Which of the following is a correct way to declare an abstract method in Java?

abstract void methodName();

abstract method methodName();

void methodName() abstract;

methodName() abstract;

43 / 50

What is the default filename extension for compiled Java files?

.java

.class

.exe

.jar

44 / 50

Finally block is attached to?

Try-catch block

Class block

Method block

All of these

45 / 50

Which method is used to get the length of a String in Java?

length

size

getLength

length()

46 / 50

After compilation, Java code is converted into:

Machine code

Assembly code

Bytecode

C++ code

47 / 50

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

Scanner

Input

Applier

None of these

48 / 50

Can the Java program accept input from the command line?

Yes, using command-line arguments

Yes, by access command prompt

None of these

49 / 50

Multiline comment is created using ________________

/* */

All of these

50 / 50

Which of the following is true about interfaces in Java?

Interfaces can contain method implementations

Interfaces can have constructors

Interfaces can contain only abstract methods and final variables

Interfaces can contain instance variables

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