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Core Java Interview Questions
Questions Answers Views Company eMail

Why null interfaces are used in Java?

2 8508

What is a Wrapper class?

14 44683

Write a program for recursive Traverse?

1 6270

Write a program to create a binary Tree ?

2 9226

what are Hostile Applets?

1 2168

what is a transient variable?

5 11743

what is the JNDI?

3 6749

What JNDI(Java Naming and Directory Interface) provides?

4 7573

Explain, why the constructor is required in implemented class?

4 8210

is java support call by reference and call by value, if supports please explain?

5 22123

what is the difference between the "protected and default" modifiers?

8 24282

where u use Abstraction and Interface in real time

Sonata,

3 9092

Difference between JDK, JRE, JVM

Deloitte, HCL, Mind Tree, Oracle, Reliance, TCS, ThinkBox,

16 97123

what do you meant by Platform-Independent?

Persistent,

6 13972

Why Java is not purely object oriented?

Elitecore, Persistent, Reliance, Wipro,

50 80165


Post New Core Java Questions

Un-Answered Questions { Core Java }

Write a java program to find the route that connects between Red and Green Cells. General Rules for traversal 1. You can traverse from one cell to another vertically, horizontally or diagonally. 2. You cannot traverse through Black cells. 3. There should be only one Red and Green cell and at least one of each should be present. Otherwise the array is invalid. 4. You cannot revisit a cell that you have already traversed. 5. The maze need not be in the same as given in the above example

2649


Write a program to print count of empty strings in java 8?

1071


Is minecraft 1.15 out?

1024


Write a program to find the whether a number is an Armstrong number or not?

1085


Realized?

2239


What is parsing in java?

1022


What do you mean by an interface in java?

1084


What is a constructor overloading in java?

1113


Differentiate between static and non-static methods in java.

1106


How to create a base64 decoder in java8?

1119


How to sort array in descending order in java?

976


Explain public static void main(string args[]) in java.

1053


What is the difference between equals() and == in java?

1021


What are the differences between heap and stack memory in java?

1112


What is java string pool?

1068