Q. What is the difference between Singleton and Immutable object
Java Intern Interview Questions
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Question: Write pseudo code to validate and evaluate a given arithematic expression Example: a+(b*c)+(d/e) If the input is syntactically wrong, display an error message else display the result
Question: Write a simple query to show data in a single resultset. Resultset should have department table data first order by deptname and followed immediately by sub-department table data also ordered by deptname. Both tables data should be wrapped in a single resultset, with the above criteria.
what is the output public class Barclays { static class A{ A(){ f(); } public void f(){ System.out.println("A ctor"); } } static class B extends A{ B(){ f(); } public void f(){ System.out.println("B ctor"); } } public static void main(String[] args) { B b = new B(); b.f(); A a = new A(); a.f(); } }
How concurrent Hashmap works ?
Write a method to remove even numbers from list without using any other collection.
Program : find duplicate string from list
Yeah, it is not thread safe, you can call it just a certain number of times, what would you do? There is some feature in the language, but I'm trying to see what you think.
1. Implement Comparable Interface? 2. Write a Employee class and sort its properties age and Emp name? 3. How actually hashmap works in Java? 4. How the size of ArrayList grows dynamically?
Draw merge sort on paper.
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