Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

Can we declare the main method of our class as private?

1005

What are loops in java? What are three types of loops?

1033

What are java packages? What's the significance of packages?

1331

In java, how we can disallow serialization of variables?

994

What are loops in java?

2 1272

Why runnable interface is used in java?

1136

How garbage collection is done in java?

1054

There are two classes named classa and classb. Both classes are in the same package. Can a private member of classa can be accessed by an object of classb?

1492

What is the base class in java from which all classes are derived?

979

Can we declare a class as abstract without having any abstract method?

1001

Which of the following classes will have more memory allocated?

1017

Does importing a package imports its sub-packages as well in java?

972

How objects of a class are created if no constructor is defined in the class?

1072

Give an example of use of pointers in java class.

1031

I want to persist data of objects for later use. What is the best approach to do so?

1066

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Un-Answered Questions { Core Java }

What is variable and its types?

1019

What is bubble sorting in java?

1045

Write a program to solve producer consumer problem in java?

1012

How can you set an applet’s height and width as a percentage?

931

What is a default constraint?

1070

What is the difference between access specifiers and access modifiers in java?

1176

Give reasons supporting that string is immutable.

943

What are invisible components?.

2146

What do you mean by checked exceptions?

959

Why does java not support pointers?

1106

Is empty list java?

930

How do you find the maximum number from an array without comparing and sorting?

1123

There are two classes named classa and classb. Both classes are in the same package. Can a private member of classa can be accessed by an object of classb?

1492

What is percentage in java?

1006

How do you remove duplicates in java?

1020

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