Core Java Interview Questions
Questions Answers Views Company eMail

What does jenkins do?

480

Explain Linked HashSet

1 728

List methods available in Java Queue interface

1 618

Explain Big-O notation with an example

1 620

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); } }

547

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); } }

1 771

Why are strings immutable in Java?

1 632

How to convert string to int in java?

1 643

How to use scanner in java?

1 772

How does a cookie work in Servlets?

336

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

365


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Un-Answered Questions { Core Java }

Explain about doubly linked list

610


Explain the term virtual machine?

581


How do you find the absolute value?

555


Can one thread block the other thread?

599


Is it possible to compare various strings with the help of == operator? What are the risks involved?

605






Why deletion in linkedlist is fast than arraylist?

529


Write down program for following scenario. Use java coding standard. You have array list with some words in it..we will call it as dictionary….and you have a arbitrary string containing some chars in it. You have to go through each word of dictionary and find out if that word can be constructed with the help of chars from arbitrary string given. If you find the word print it else print none.

2275


What does i ++ mean in Java?

496


Define immutable object?

575


what is the difference between Object Based Language and Object Oriented Language?

591


Does java have a compiler?

551


Why is string class considered immutable?

593


Explain what pure virtual function is?

585


Is string pool garbage collected?

538


What is derived datatype?

621