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

Core Java Interview Questions

Questions Answers Views Company eMail

What does jenkins do?

914

Explain Linked HashSet

1 1609

List methods available in Java Queue interface

1 1471

Explain Big-O notation with an example

1 1481

10. What is the output of the following Java program? class Main { public static void main(String args[]){ final int i; i = 10; System.out.println(i); } } 10. What is the output of the following Java program? class Main { public static void main(String args[]){ final int i; i = 10; System.out.println(i); } }

998

What is the output of the following Java program? class Main { public static void main(String args[]){ final int i; i = 10; System.out.println(i); } } 10. What is the output of the following Java program? class Main { public static void main(String args[]){ final int i; i = 10; System.out.println(i); } }

1 1527

Why are strings immutable in Java?

1 1547

How to convert string to int in java?

1 1478

How to use scanner in java?

1 1746

How does a cookie work in Servlets?

844

What the difference is between execute, execute Query, execute Update?

835

Is Java Platform Independent if then how?

5 1343

What will happen if we declare don’t declare the main as static?

5 1449

How many types of packages are there in Java?

5 1456

Explain different data types in Java.

5 1444

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Un-Answered Questions { Core Java }

Is java code slower than native code?

1067

What is early binding and late binding in java?

1192

Why do we need autoboxing in java?

998

What about features of local inner class?

1069

What is multi level inheritance in java?

1033

what is synchronization? : Java thread

1027

How do you declare an empty string?

1063

What are the 8 data types in java?

995

Is null == null in java?

1108

What is a stack class in java ?

1107

What is run time allocation?

1025

Define how objects are stored in java?

1062

What is boolean logic?

1025

What are synchronized methods and synchronized statements in java programming?

1023

Is multiple inheritance supported by java?

994

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