FreeCharge Interview Experienced 2.5 years

I got the call from FreeCharge to have face to face interview in weekend.

Round 1 :
1. Reduce matrix of 0, 1 to the array so that it can only store 1 and can be convert in anytime to original matrix
2. Left View and Right view of tree
3. Square root of any number upto 2 precision (log(n)
4.Basic oops concept
5. some tricky question on polymorphism ( by grand children)

Round 2 :

1. Searching element in sorted linked list
2. nodes at k unit distance from given node in a tree
3. which provide better abstraction interface or abstract class
4. Join vs Subquery
5. Race Condition and some other basic basic sql java concept.

Round 3 :

1. Project Discussion
2. Diameter of tree
3. String literal, String pool
4. Java function call some questions
5. basic questions of  nosql db, multithreading, design, queue, spring

Write your Interview Experience or mail it to

My Personal Notes arrow_drop_up

If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.