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?

908

Explain Linked HashSet

1 1603

List methods available in Java Queue interface

1 1449

Explain Big-O notation with an example

1 1464

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); } }

993

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 1523

Why are strings immutable in Java?

1 1543

How to convert string to int in java?

1 1472

How to use scanner in java?

1 1727

How does a cookie work in Servlets?

838

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

831

Is Java Platform Independent if then how?

5 1314

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

5 1425

How many types of packages are there in Java?

5 1440

Explain different data types in Java.

5 1403

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Un-Answered Questions { Core Java }

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

999

How to split arraylist elements in java?

1165

What access modifiers can be used for variables?

1144

What are the two parts of a conditional statement?

961

Is java a pure object oriented language?

961

Is alive and join method in java?

1162

What is a numeric digit?

1079

Why can't we override private static methods?

965

Differentiate between == and equals().

1047

State some advantages of java?

1224

Using callable statement how can you pass out parameters, explain with example?

1227

Is logger a singleton?

946

What is an infinite loop? How infinite loop is declared?

1102

What is a parent class in java?

1014

What is the difference between method overriding and overloading?

1227

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