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

Core Java Interview Questions

Questions Answers Views Company eMail

Explain wait(), notify() and notifyall() methods of object class ?

1 1131

How to instantiate member inner class?

1 1154

Is this valid in java ? Can we instantiate interface in java?

1 1032

Explain about main() method in java ?

1 1122

What is an exception in java?

1 1170

Which is the best approach for creating thread ?

1 1282

Can we define package statement after import statement in java?

1 1108

How to instantiate static nested classes in java?

1 1156

Will the compiler creates a default constructor if I have a parameterized constructor in the class?

1 1195

Explain about interrupt() method of thread class ?

1 1184

Can we have more than one package statement in source file ?

1 1100

Explain differences between checked and unchecked exceptions in java?

1 1126

Can we have any code between try and finally blocks?

1 1083

If two threads have same priority which thread will be executed first ?

1 1586

Explain creating threads by extending thread class ?

1 1104

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Un-Answered Questions { Core Java }

How to sort array in descending order in java?

976

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

1085

How to create a base64 decoder in java8?

1119

Differentiate between static and non-static methods in java.

1106

Is minecraft 1.15 out?

1024

What is java string pool?

1068

What is the difference between break and continue statements?

1107

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

Realized?

2239

What is an object in java and how is it created?

1110

What do you mean by an interface in java?

1084

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

1071

What is a constructor overloading in java?

1113

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

1053

explain different ways of using thread? : Java thread

1068

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