JAVA Exam EFC-BANGALORE - MSME

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JAVA-BANGALORE-12THJULY24

1 / 50

Which keyword is used for accessing the features of a package?

package

import

extends

export

2 / 50

What are packages in Java?

Methods of a friend class

Methods of the main class

Way to encapsulate a group of classes, sub-packages, and interface

All of these

3 / 50

An interface with no fields or methods is known as a ______________

Runnable Interface

Marker Interface

Abstract Interface

CharSequence Interface

4 / 50

Which escape character is used for word character in regex?

/str

5 / 50

Multithreading in java is _______________

Executing multiple processes simultaneously

Creating more threads at a time

Blocking threads

All of these

6 / 50

What are regexes in Java?

API to define a pattern for searching strings

String

Array to create a new integer

Wrapper class

7 / 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

8 / 50

What is a map in Java?

Data structure

Defined in java.util package

Represented using key-value pairs

All of these

9 / 50

What is a set in Java?

Represented in the form of values

Used to store key-value pairs

Primary structures

All of these

10 / 50

Jar in java stands for ____________

Java Archive

Java application runtime

Java application runner

None of these

11 / 50

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

length()

len()

sizeof()

size()

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 of the following is not a Java features?

Dynamic

Architecture Neutral

Use of pointers

Object-oriented

14 / 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

15 / 50

What do you mean by nameless objects?

An object created by using the new keyword.

An object of a superclass created in the subclass

An object without having any name but having a reference.

An object that has no reference.

16 / 50

Which of the following is an immediate subclass of the Panel class?

Applet class

Window class

Frame class

Dialog class

17 / 50

What is the default encoding of OutstreamWriter?

UTF-32

UTF-16

UTF-12

Based on the host platform

18 / 50

When a finally block executed in Java?

Try block is executed without any exception

Exception has occurred

Executed at last

None of these

19 / 50

Which method in Java is used to check for NaN values?

isNan()

checkNan()

isNotNan()

All of these

20 / 50

What do you mean by nameless objects?

An object created by using the new keyword.

An object of a superclass created in the subclass

An object without having any name but having a reference.

An object that has no reference.

21 / 50

What do you mean by chained exceptions in Java?

Exceptions occurred by the VirtualMachineError

An exception caused by other exceptions

Exceptions occur in chains with discarding the debugging information

None of the above

22 / 50

Which option is false about the final keyword?

A final method cannot be overridden in its subclasses.

A final class cannot be extended.

A final class cannot extend other classes

A final method can be inherited.

23 / 50

Which of these is not a valid Boolean method in Java?

equals() method

hashCode() method

toString() method

All of these

24 / 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

25 / 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

26 / 50

In which memory a String is stored, when we create a string using new operator?

Stack

String memory

Heap memory

Random storage space

27 / 50

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

convertRadtoDeg()

toDegrees()

degree()

All of these

28 / 50

Empty interface in Java is called?

Marker interface

Abstract class

Derived class

None of these

29 / 50

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

deleteAll()

delete()

clearAll()

clear()

30 / 50

What is the use of the intern() method?

It returns the existing string from memory

It creates a new string in the database

It modifies the existing string in the database

None of the above

31 / 50

Which of the following is true about the anonymous inner class?

It has only methods

Objects can't be created

It has a fixed class name

It has no class name

32 / 50

Which of these classes are the direct subclasses of the Throwable class?

RuntimeException and Error class

Exception and VirtualMachineError class

Error and Exception class

IOException and VirtualMachineError class

33 / 50

What is the full form of AWT?

Absolute window toolKit

Abstract window toolKit

Absolute wear kit

Abstract window tools

34 / 50

Which of the following is false?

The rt.jar stands for the runtime jar

It is an optional jar file

It contains all the compiled class files

All the classes available in rt.jar is known to the JVM

35 / 50

Which package contains the Random class?

java.util package

java.lang package

java.awt package

java.io package

36 / 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")

37 / 50

The result of dividing by 0 in Java is _____________

Error

Expectation

Infinite

None of these

38 / 50

What is meant by the classes and objects that dependents on each other?

Tight Coupling

Cohesion

Loose Coupling

None of the above

39 / 50

Which of these is a non-access modifier?

public

private

native

All of these

40 / 50

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

addValue()

copy()

cpy()

addAll()

41 / 50

In which process, a local variable has the same name as one of the instance
variables?

Serialization

Variable Shadowing

Abstraction

Multi-threading

42 / 50

In java, jar stands for_________

Java Archive Runner

Java Application Resource

Java Application Runner

None of the above

43 / 50

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

get

import

extends

All of these

44 / 50

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

JVM

JRE

JDK

JDB

45 / 50

What is boolean in Java?

A value consisting of only true and false value

A value consisting of 8 values

Truthy value in java

All of these

46 / 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")

47 / 50

Which of the following is a marker interface?

Runnable interface

Remote interface

Readable interface

Result interface

48 / 50

Which of the following is a reserved keyword in Java?

object

strictfp

main

system

49 / 50

Which of the following sorts the elements were inserted?

Hashtable

Map

Array

None of these

50 / 50

Which thread is executed in the background?

New thread

User-created thread

Daemon thread

All of these

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