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Frequently Asked Java interview questions and answers for freshers

(#M40031853) JAVA QUESTION Keep an EYE

What is the output of this program?

class average {
public static void main(String args[])
{
double num[] = {5.5, 10.1, 11, 12.8, 56.9, 2.5};
double result;
result = 0;
for (int i = 0; i < 6; ++i)
result = result + num[i];
System.out.print(result/6);

}
}
a) 16.34
b) 16.566666644
c) 16.46666666666667
d) 16.46666666666666

Asked In Java Rajendra Singh (11 years ago)

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(#M40167114) JAVA QUESTION Java question Keep an EYE

What will be the output of the following program?

class A
{
public void test()
{
System.out.println("Class A");
}
}
class Trial extends A
{
public void test()
{
System.out.println("Class Trial");
}
public static void main(String args[])
{
Trial object = (Trial)new A();
object.test();
}
}

A. Runtime Error
B. Compile Time Error
C. Class A
D. Class Trial

Asked In Java Jax (3 years ago)

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(#M40167160) JAVA QUESTION Keep an EYE

6. Which of the following refers to data encapsulation in object oriented programming?

A. The data and operations for an object are defined and fixed

B. The data of an object is encapsulated in its class

C. The data is hidden for an object

D.A class can have multiple object​

Asked In Java Mansoor (2 years ago)

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(#M40029406) JAVA QUESTION java Keep an EYE

Q. Why there are no global variables in Java?

A. Global variables are globally accessible. Java does not support globally accessible variables due to following reasons:
1)The global variables breaks the referential transparency
2)Global variables creates collisions in namespace

Asked In Java MAN (12 years ago)

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(#M40031854) JAVA QUESTION Keep an EYE

What is the output of this program?

class conversion {
public static void main(String args[])
{
double a = 295.04;
int b = 300;
byte c = (byte) a;
byte d = (byte) b;
System.out.println(c + " " + d);
}
}
a) 38 43
b) 39 44
c) 295 300
d) 295.04 300

Asked In Java Rajendra Singh (11 years ago)

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(#M40167113) JAVA QUESTION instanceof question Keep an EYE

What will be the output of the program?

class Tree { }

class Pine extends Tree { }

class Oak extends Tree { }

public class Forest1
{
public static void main (String [] args)
{
Tree tree = new Pine();

if( tree instanceof Pine )
System.out.println ("Pine");

else if( tree instanceof Tree )
System.out.println ("Tree");

else if( tree instanceof Oak )
System.out.println ( "Oak" );

else
System.out.println ("Oops ");
}
}

A. Oops
B. Tree
C. Pine
D. Forest

Asked In Java Jax (3 years ago)

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(#M40167115) JAVA QUESTION Inheritance relationship in Java Keep an EYE

Which of the following statements are correct with respect to inheritance relationship in java?

A. object of subclass referenced by super class type can invoke super class methods
B. object of subclass referenced by super class type can access newly defined sub class variables
C. object of subclass referenced by super class type can access super class variables
D. object of subclass referenced by super class type can invoke overridden sub class methods
E. object of subclass referenced by super class type can invoke newly defined sub class methods

Asked In Java Jax (3 years ago)

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(#M40167117) JAVA QUESTION Access Modifiers Keep an EYE

Given a method in a public class, ________ access modifier must be used to restrict access to that method to only the other members of the same class.

A. final
B. private
C. protected
D. default

Asked In Java Jax (3 years ago)

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(#M40167119) JAVA QUESTION equals() vs == based question Keep an EYE

What is the output of the following program?

import java.util.Arrays;

class Test
{
public static void main(String args[])
{
String[] cities = new String[]{"London", "Paris", "NewYork", "HongKong", "Tokyo"};
String[] metros = new String[]{"London", "Paris", "NewYork", "HongKong", "Tokyo"};
String[] capitals = cities;
System.out.println("cities == metros : " + (cities == metros));
System.out.println("cities == capitals : " + (cities == capitals));
System.out.println("cities.equals(metros) : " + cities.equals(metros));
System.out.println("cities.equals(capitals) : " + cities.equals(capitals));
System.out.println("Arrays.equals(cities, metros) : " + Arrays.equals(cities, metros));
System.out.println("Arrays.equals(cities, capitals) : " + Arrays.equals(cities, capitals));
}
}


A. cities == metros : false
cities == capitals : true
cities.equals(metros) : true
cities.equals(capitals) : true
Arrays.equals(cities, metros) : false
Arrays.equals(cities, capitals) : true

B. cities == metros : false
cities == capitals : true
cities.equals(metros) : true
cities.equals(capitals) : true
Arrays.equals(cities, metros) : true
Arrays.equals(cities, capitals) : true

C. cities == metros : false
cities == capitals : true
cities.equals(metros) : false
cities.equals(capitals) : true
Arrays.equals(cities, metros) : true
Arrays.equals(cities, capitals) : true

D. cities == metros : false
cities == capitals : true
cities.equals(metros) : false
cities.equals(capitals) : true
Arrays.equals(cities, metros) : true
Arrays.equals(cities, capitals) : false

Asked In Java Jax (3 years ago)

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(#M40167127) JAVA QUESTION Checked vs Unchecked exceptions Keep an EYE

Which exceptions should be explicitly handled or properly propagated?

A. Unchecked exceptions
B. Checked exceptions
C. Errors
C. None of the above

Asked In Java Jax (3 years ago)

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